Neoplasia endocrina múltiple tipo 1 en paciente con diagnóstico de nesidioblastosis. Presentación de un caso

Las neoplasias endocrinas múltiples engloban una serie de síndromes caracterizados por su origen genético y la afectación de una o más glándulas. Se describe el caso de un paciente masculino, de 23 años, con antecedentes de salud de nesidioblastosis diagnosticado a los 16 años de edad, quien acudió al Hospital General Docente Ambato por presentar convulsiones tónico clónicas, e hipoglucemia severa con posterior estatus epiléptico. Los estudios de laboratorio mostraron hiperparatiroidismo primario, y los de imagen identificaron lesiones sugerentes de adenoma paratiroideo e insulinoma de cabeza de páncreas. Después de analizar el caso, se identificaron dos criterios para plantear una neoplasia endocrina múltiple tipo 1: presencia de insulinoma e hiperparatiroidismo primario. Además de tratamiento con bifosfonato, se planificó interconsulta con el servicio de Genética, para estudio del paciente y familiares; y con Cirugía General, para programación de resolución quirúrgica. Debido a la poca frecuencia de esta enfermedad, resulta de interés describir el caso, con el objetivo de exponer las principales manifestaciones clínicas y conducta a seguir. Constituye una prioridad el diagnóstico de su causa en cada paciente.

Multiple endocrine neoplasias encompass a series of syndromes characterized by their genetic origin and the involvement of one or more glands. A 23-years-old male patient with a health history of nesidioblastosis diagnosed at 16 years of age, who attended the Ambato General Teaching Hospital with tonic-clonic seizures and severe hypoglycemia with subsequent epileptic status, is described. Laboratory studies showed primary hyperparathyroidism, and imaging identified lesions suggestive of parathyroid adenoma and insulinoma of the head of the pancreas. After analyzing the case, two criteria were identified to suggest multiple endocrine neoplasia type 1: presence of insulinoma and primary hyperparathyroidism. In addition to treatment with bisphosphonate, consultation with the Genetics service was planned for study of the patient and family members; and with General Surgery, for scheduling surgical resolution. Due to the infrequency of this disease, it is of interest to describe the case, with the aim of exposing the main clinical manifestations and conduct to follow. Diagnosing its cause in each patient is a priority.

Diagnóstico mutacional del gen RET y la medicina de precisión en México / RET gene mutational diagnosis and precision medicine in Mexico

Resumen La medicina de precisión en algunas enfermedades es una realidad; respalda el desarrollo de métodos diagnósticos certeros y específicos, de nuevas drogas y moléculas. Nuestro equipo de investigación en México, conformado por investigadores clínicos y biomédicos, desde hace 20 años realiza de forma gratuita el diagnóstico mutacional del gen RET y su relación con el cáncer medular de tiroides y la neoplasia endocrina múltiple (NEM) 2 y 3. Las variantes patogénicas de RET en la población mexicana coinciden con los datos reportados: la mayoría con 634/NEM2 y 918/NEM3. Actualmente se están desarrollando nuevos métodos de nanobiotecnología para este tipo de determinaciones, de tal forma que puedan obtenerse resultados más rápidos, simples, sensibles y específicos aplicables en todo tipo de laboratorio.

Abstract Precision medicine is a reality in some diseases; it supports the development of accurate and specific diagnostic methods, new drugs and molecules. Our research team in Mexico, made up of clinical and biomedical researchers, has been performing free RET gene mutational diagnosis for medullary thyroid cancer and multiple endocrine neoplasia (MEN) 2 and 3 for 20 years. RET pathogenic variants in the Mexican population are consistent with reported data: most common mutations are 634/NEM2 and 918/NEM3. Currently, new nanobiotechnology methods are being developed for this type of determination in order to obtain faster, simpler, more sensitive and specific results applicable in all types of laboratories.

Neoplasia endocrina múltiple IIA: feocromocitoma bilateral. A propósito de un caso y revisión de la literatura / Multiple Endocrine Neoplasia IIA: Bilateral Pheochromocytoma. About a Case and Literature Review

Resumen: Presentamos el caso de una paciente del sexo femenino, de 54 años de edad, con antecedente familiar de neoplasia endocrina múltiple tipo II, con estudio genético positivo para NEM 2 IIA EXON 11, c634 CGCIB. Inició padecimiento con cardiopatía hipertensiva y disfunción diastólica, hallazgo to mográfico de tumor suprarrenal bilateral por imagenología, se realizó adrenalectomía convencional transabdominal, se encontró tumor derecho con cápsula correspondiente a feo cromocitoma con un peso de 1,100 g de 14.5 cm de diámetro mayor con invasión a cápsula sin romperla, tumor suprarrenal izquierdo correspondiente a feocromocitoma con un peso de 950 g de 15 cm de diámetro mayor.

Abstract: We present the case of a 54-year-old female patient with a family history of multiple endocrine neoplasia type II, with a genetic study for MEN 2 IIA EXON 11, CG6B c634, onset with hypertensive heart disease and diastolic dysfunction, tomographic finding of bilateral adrenal tumor by imaging. A conventional transabdominal adrenalectomy was performed, finding a right tumor with a capsule corresponding to pheochromocytoma with a weight of 1,100 g of 14.5 cm of greater diameter with invasion of the capsule without breaking it, and a left adrenal tumor corresponding to pheochromocytoma with a weight of 950 g of 15 cm of greater diameter.

Comparison of clinical characteristics between sporadic gastrinoma and multiple endocrine neoplasia type 1-related gastrinoma / 中华胃肠外科杂志

Objective: To compare clinical characteristics of sporadic gastrinoma and multiple endocrine neoplasia type 1 (MEN1)-related gastrinoma. Methods: A retrospective cohort study was conducted. Patients with clinical manifestations of Zollinger-Ellison syndrome, pathological diagnosis as neuroendocrine neoplasm (NEN) and complete clinical and follow-up data were enrolled. Patients with only high gastric acid secretion but without evidence of NEN, or with other concurrent non-NEN tumors were excluded. According to the above criteria, the clinicopathological data of 52 cases of gastrinoma diagnosed from April 2003 to December 2020 in the First Affiliated Hospital, Sun Yat-sen University, were collected. Patients who met the diagnostic criteria of gastrinoma and met one of the following conditions were diagnosed as MEN1-related gastrinoma: (1) the presence of pathogenic mutations in the MEN1 gene confirmed by genetic testing; (2) NENs involving two or more endocrine glands, namely, pituitary, parathyroid, thymic, pancreatic, and adrenal NENs; (3) NEN and at least one first-degree relatives diagnosed as MEN1. The remaining gastrinomas were defined as sporadic gastrinoma. Student's t test and chi-square test were used for statistical analysis. Clinicopathological characteristics, endoscopic findings, imaging characteristics, treatment, and prognosis of sporadic and MEN1-related gastrinoma were compared. Results: Among 52 patients with gastrinoma, 33 were sporadic gastrinoma and 19 were MEN1-related gastrinoma. The common symptoms of both sporadic and MEN1-related gastrinomas were diarrhea (24/33, 72.7%; 17/19, 89.5%) and abdominal pain (19/33, 57.6%; 9/19, 47.4%). Compared with sporadic gastrinoma, MEN1-related gastrinoma needed longer time for diagnosis [(7.4±4.9) years vs. (3.9±5.2) years, t=-2.355, P=0.022), were more likely multiple tumors [47.4% (9/19) vs. 15.2% (5/33), χ(2)=6.361, P=0.012], had smaller diameter [(1.7±1.0) cm vs. (3.1±1.8) cm, t=2.942, P=0.005), presented the lower tumor grade [G1: 83.3% (15/18) vs. 39.4% (13/33); G2: 11.1% (2/18) vs. 54.5% (18/33); G3: 5.6% (1/18) vs. 6.1% (2/33), Z=-2.766, P=0.006], were less likely to have serum gastrin which was 10 times higher than normal [11.8% (2/17) vs. 56.0% (14/33), χ(2)=8.396, P=0.004], had higher probability of complication with type 2 gastric neuroendocrine tumors (g-NET) [31.6% (6/19) vs. 3.0%(1/33), χ(2)=6.163, P=0.013], and had lower rate of liver metastasis [21.1% (4/19) vs. 51.5% (17/33), χ(2)=4.648, P=0.031). There was no obvious difference between sporadic gastrinomas and MEN1-related gastrinomas in endoscopic findings. Both types presented enlarged and swollen gastric mucosa under the stimulation of high gastric acid, and multiple ulcers in the stomach and duodenum could be seen. Gastrinoma with type 2 g-NET presented multiple polypoid raised lesions in the fundus and body of the stomach. (68)Ga-SSR-PET/CT scan had a 100% detection rate for both types while (18)F-FDG-PET/CT scan had a higher detection rate for sporadic gastrinoma compared with MEN1-related gastrinoma [57.9% (11/19) vs. 20.0% (3/15), χ(2)=4.970, P=0.026]. Among the patients with sporadic gastrinoma, 19 received surgical treatment, 1 underwent endoscopic submucosal dissection, 8 underwent transcatheter arterial embolization (TAE), and 5 underwent surgery combined with TAE. Among patients with MEN1-related gastrinoma, 13 received surgical treatment, and the other 6 received conservative treatment. The median follow-up of all the patients was 21.5 (1-129) months, and the 5-year survival rate was 88.4%. The 5-year survival rate of patients with sporadic and MEN1-related gastrinomas was 89.5% and 80.0% respectively (P=0.949). The 5-year survival rate of patients with and without liver metastasis was 76.2% vs. 100%, respectively (P=0.061). Conclusions: Compared with sporadic gastrinoma, MEN1-related gastrinoma has longer diagnosis delay, smaller tumor diameter, lower tumor grading, lower risk of liver metastasis, and is more likely to complicate with type 2 g-NET, while there is no difference in survival between the two tumor types.

Solitary circumscribed neuroma of the conjunctiva: Differential diagnosis from neurofibroma is a must? / Neuroma circunscrito solitário da conjuntiva: diagnóstico diferencial de neurofibroma obrigatório?

ABSTRACT A 42-year-old male presented with a 4-week history of a mass in the right inferior palpebral conjunctiva close to the punctum. An excisional biopsy of the lesion and histopathological examination revealed that the mass was composed of Schwann cells with thin conical nuclei, fine chromatin, and unnoticeable nucleoli. Immunohistochemically, the spindle cells were diffusely and strongly positive for S100 protein. Neurofilament immunostaining was also positive, which highlighted axons. In light of these findings, the tumor was diagnosed as solitary circumscribed neuroma. A comprehensive evaluation for multiple endocrine neoplasia type 2b was performed. However, no multiple endocrine neoplasia type 2b stigmata and no family history were detected. The diagnosis was therefore finalized as solitary circumscribed neuroma, which is considered as a rare condition. The differential diagnosis is based on the histopathological examination and immunohistochemical evaluation. As the tumor can be related with multiple endocrine neoplasia type 2b, it is essential to systematically investigate for multiple endocrine neoplasia type 2b in such cases.

RESUMO Um homem de 42 anos apresentou uma massa na conjuntiva palpebral inferior direita, próxima ao punctum, com evolução de 4 semanas. Uma biópsia excisional da lesão e o subsequente exame anatomopatológico revelaram que a massa era composta de células de Schwann com núcleos cônicos, croma­tina fina e nucléolos não visíveis. Ao exame imuno-histoquímico, as células fusiformes mostraram-se difusa e fortemente positivas para a proteína S100. A imunocoloração também foi positiva para neurofilamentos e evidenciou os axônios. Considerando esses achados, o tumor foi diagnosticado como um neuroma circunscrito solitário. Procedeu-se uma investigação completa para neoplasia endócrina múltipla tipo 2b, entretanto, estigmas característicos e história familiar não foram detectados. Assim, o diagnóstico foi firmado como neuroma circunscrito solitário, condição rara cujo diagnóstico diferencial baseia-se no exame anatomopatológico e na avaliação imuno-histoquímica. Já que esse tumor pode estar relacionado à neoplasia endócrina múltipla tipo 2b, torna-se essencial, nesses casos, a investigação da neoplasia de forma sistemática.

Hereditary pituitary tumor syndromes: genetic and clinical aspects

ABSTRACT The pituitary gland is responsible for the synthesis and secretion of various hormones that play a key role in regulating endocrine function and homeostasis. Pituitary adenomas (PA) are benign epithelial tumors arising from the endocrine cells of the anterior pituitary gland. Clinically relevant PA are relatively common and they occur in 0.1% of the general population. They are mostly benign monoclonal neoplasms that arise from any of the five hormone-secreting cell types of the anterior pituitary gland. PA are categorized as either functioning or non-functioning, depending on whether or not they produce a hormonal hypersecretion syndrome. Both functioning and non-functioning adenomas can produce symptoms or signs resulting from compression of the optic chiasm or invasion of cavernous sinuses. Only 5% of PA occur within the context of hereditary syndromes with reasonably well-defined oncogenic mechanisms. The vast majority of PA are sporadic, and their etiopathogenesis remains largely unknown. Pituitary tumor oncogenesis involves several mechanisms that eventually lead to abnormal cell proliferation and dysregulated hormone production. Among these factors, we found inactivating mutations of tumor suppressor genes, activating mutation of oncogenes and the participation of hormonal signals coming from the hypothalamus, all resulting in cell-cycle regulation abnormalities. In this review, we summarize the clinical and pathophysiological aspects of the different hereditary pituitary tumor syndromes.

Thyrotropin-secreting adenoma in multiple endocrine neoplasia type 1: one case report and literature review / 中华内分泌代谢杂志

Objective@#To improve the understanding of thyrotropin-secreting adenoma in multiple endocrine neoplasia type 1(MEN1) through analyzing the clinical diagnosis and treatment process, as well as outcomes in one case of this disorder.@*Methods@#The clinical manifestations, biochemical and hormone levels, imaging presentations, medical and surgical treatments, and post-operational pathologic findings in the process of diagnosis and treatment of a patient with thyrotropin-secreting adenoma in MEN1 were analyzed. The next generation sequencing followed by Sanger method was used for analyzing MEN1 and related genes. The results were evaluated with online PolyPhen2 and PROVEAN for variation hazard.@*Results@#One 19-year old male patient was diagnosed with hyperthyroidism due to thyrotoxicosis and high level of thyroid hormones(THs) with measurable TSH(2.78 mIU/L) and negative thyrotropin receptor antibody(TRAb). Meanwhile, primary hyperparathyroidism was suggested by hypercalcemia, hypophosphatemia, and elevated intact parathyroid hormone(PTH) level, all the parameters were returned to normal after surgical resection of the mass which was below the left thyroid lobe indicated by ultrasound and 99mTc scan. Thyrotoxicosis remained in spite of one year treatment with antithyroid drug, thyrotropinoma was then suspected, and subsequent MRI scan found a macroadenoma at right pituitary. TSH and THs returned to normal 1 month after transsphenoidal removal of the adenoma. As expected, immunohistochemical staining revealed TSH positive. In addition, a pancreatic mass was found by both CT and MRI scan, which was considered as a silent neuroendocrine tumor. Gene analysis revealed a missense mutation of MEN1 as c. 415C>T and p. His139Tyr(H139Y), which was predicted highly hazard. Only five cases of thyrotropinoma in MEN1 were previously reported.@*Conclusion@#Thyrotropinoma should be cautiously identified from hyperthyroidism to avoid misdiagnosis and mistreatment, and it should keep in mind that thyrotropinoma may be associated with MEN1 though it would be very rare.

Multiple endocrine neoplasia-IIb with RET gene mutation p.M918T： A case report / 中南大学学报(医学版)

Multiple endocrine neoplasia-IIb (MEN-IIb) is a rare hereditary autosomal dominant syndrome caused by mutations in the RET proto-oncogene. It's characterized by medullary thyroid carcinoma (MTC), pheochromocytoma (PHEO), mucosal neuromas, and Marfanoid habitus. Because of the rarity of MEN-IIb and finiteness of clinical cognition, the majority of the patients suffer a delayed diagnosis. A MEN-IIb patient with the lingual mucosal neuromas since childhood was admitted in the Third Xiangya Hospital of Central South University in November, 2018. He had surgical history of mitral valve prolapse and spinal deformity. He was diagnosed with MTC and PHEO at the age of 22 and 28, respectively, and received surgical treatments. Sequencing of RET gene revealed a de novo heterozygous p.M918T mutation in the patient. Being aware of the unique clinical phenotype and screening of RET gene mutation may lead to the early diagnosis and better long-term outcome for MEN-IIb.

From 'Me' to 'Us': solidarity and biocitizenship in the Brazilian cancer precision medicine innovation system / De 'Mim' para 'Nós': solidariedade e biocidadania no sistema brasileiro de inovação em medicina de precisão para o câncer

ABSTRACT As biotechnology innovations move from the bench to the bedside and, recently, also to the Internet, a myriad of emanating challenges and potentials may rise under distinct sociocultural and political economic contexts. Using a grounded-theory-inspired case study focused on the Brazilian research consortium for Medullary Endocrine Neoplasia type 2 (BrasMEN) - an inherited syndrome where genetic tests define cost-effective interventions - we outline facilitators and barriers to both development and implementation of a 'public health genomics' strategy under a developing country scenario. The study is based on participant observation at three centres and interviews with all who might hold an interest in MEN2 around Brazil. We discuss how a 'solidarity'-based motivation for individual and collective 'biocitizenship' is driving people's pre-emptive actions for accessing and making personalised healthcare available at Brazil's Unified Health System (SUS) via the 'co-production' of science, technology and the culture for precision medicine - termed Brazil's 'hidden' biomedical innovation system. Given the establishment of BrasMEN as 'solidarity networks' - promoting and supporting the cancer precision medicine's rationale - our data illustrates how a series of new bioethical challenges raise from such engagement with familial cancer genomics under Brazil's developing country scenario and how this social/soft technology constitute a solution for Euro/North American societies.

RESUMO Ao passo em que as inovações biotecnológicas migram da bancada para o leito e, mais recentemente, também para a Internet, uma miríade de desafios e potenciais pode surgir em contextos socioculturais e político-econômicos distintos. Usando um estudo de caso inspirado na teoria embasada em dados focado no consórcio de pesquisa brasileiro sobre a Neoplasia Endócrina Múltipla do Tipo 2 (BrasMEN) - uma síndrome rara em que testes genéticos definem intervenções custo-efetivas - ressaltamos facilitadores e barreiras para ambos desenvolvimento e implementação de uma estratégia de genômica em saúde pública no cenário de um país em desenvolvimento. O estudo foi baseado em observação participante em três centros e entrevistas com todos que podem ter um interesse sobre a MEN2 no Brasil. Discutimos como uma motivação baseada em 'solidariedade' para uma 'biocidadania' individual e coletiva está impulsionando ações preventivas nas pessoas para acessar e fazer com que cuidados em saúde personalizados sejam disponibilizados no Sistema Único de Saúde (SUS) do Brasil via a 'coprodução' de ciência, tecnologia e a cultura para medicina de precisão - denominado sistema de inovação biomédico brasileiro 'escondido'. Dado o estabelecimento do BrasMEN como 'redes de solidariedade' - promovendo e apoiando a abordagem da medicina de precisão em câncer - nossos dados ilustram como uma série de novos desafios bioéticos surgem desse engajamento com a genômica do câncer familiar no cenário de país em desenvolvimento brasileiro e como esta tecnologia social/leve constitui uma solução para sociedades europeias e norte-americanas.

Outcome and long-term follow-up of adrenal lesions in multiple endocrine neoplasia type 1

ABSTRACT Objective To describe the prevalence, clinical characteristics and outcome of adrenal lesions in long-term follow-up of Multiple endocrine neoplasia type 1 (MEN1) patients. Subjects and methods We retrospectively studied sixteen patients from six families of individuals with MEN1. Adrenal involvement was evaluated using clinical, biochemical and imaging data. Results Adrenal lesions were identified in nine of sixteen (56.3%) patients: seven women and two men (mean age: 52.2 years). Adrenal involvement was detected at MEN1 diagnosis in more than half of the patients. Eighteen adrenal nodules were founded (median of two nodules per patient) with mean adrenal lesion diameter of 17.4 mm. Three patients had unilateral adrenal involvement. Hormonal hypersecretion (autonomous cortisol secretion) was found in two patients. None of the patients was submitted to adrenalectomy, presented an aldosterone-secreting lesion, a pheochromocytoma, an adrenal carcinoma or metastatic disease during the follow-up. A predominance of stable adrenal disease, in terms of size and hormonal secretion, was observed. Adrenal lesions were evenly distributed between the germline mutations. Conclusion Adrenal tumours are a common feature of MEN1 that can affect more than half of the patients. Most of the tumours are bilateral non-functional lesions, but hormonal secretion may occur and should be promptly identified to reduce the morbidity/mortality of the syndrome. Periodic surveillance of these patients should be performed.

Zollinger-ellison syndrome. case report

ABSTRACT Introduction: The Zollinger-Ellison syndrome (ZES) is a pathology caused by a neuroendocrine tumor, usually located in the pancreas or the duodenum, which is characterized by elevated levels of gastrin, resulting in an excessive production of gastric acid. Case presentation: A 42-year-old female patient with a history of longstanding peptic ulcer disease, who consulted due to persistent epigastric pain, melena and signs of peritoneal irritation. Perforated peptic ulcer was suspected, requiring emergency surgical intervention. Subsequently, a tumor lesion in the head of the pancreas was documented and managed with Whipple procedure. The pathology results reported a tumor suggestive of neuroendocrine neoplasm. Discussion: The Zollinger-Ellison syndrome occurs in 0.1 to 3 people per 1 000 000 inhabitants worldwide and is predominant in women between 20 and 50 years of age. It usually appears as a refractory acid-peptic disease or as a complication of gastric acid hypersecretion. Medical therapy is the standard management, being proton pump inhibitors (PPI) the most effective option. Surgery is recommended for sporadic ZES. Conclusions: ZES has a low incidence rate. It is rarely considered in the differential diagnosis of chronic epigastric pain and high clinical suspicion is required to achieve adequate management. This article is highly relevant as it presents a confirmed clinical case of ZES in Colombia, highlighting the importance of producing local scientific literature to improve the diagnosis and treatment of this pathology.

RESUMEN Introducción. El síndrome de Zollinger-Ellison (SZE) es una patología producida por un tumor neuroendocrino habitualmente localizado a nivel duodenal o pancreático, el cual produce niveles elevados de gastrina, derivando en hipersecreción de ácido gástrico. Presentación del caso. Paciente femenino de 42 años con antecedente de enfermedad ulceropéptica de larga data, quién consulta por epigastralgia persistente y deposiciones melénicas y presenta signos de irritación peritoneal. Se sospecha una ulcera péptica perforada, requiriendo intervención quirúrgica de urgencia. Posteriormente se documenta una lesión tumoral en la cabeza del páncreas, manejada con cirugía de Whipple; en el reporte de patología se detecta un tumor sugestivo de neoplasia neuroendocrina. Discusión. El SZE se presenta en 0.1-3 personas por cada 1 000 000 de habitantes a nivel mundial, predominantemente en mujeres entre 20 y 50 años de edad. Suele debutar como enfermedad ácido-péptica refractaria o por complicaciones de la hipersecreción gástrica. La terapia médica es el manejo estándar, siendo la más efectiva la que involucra inhibidores de la bomba de protones. En SZE esporádico está recomendada la cirugía. Conclusiones. El SZE tiene una incidencia baja, raramente se considera en el diagnóstico diferencial de epigastralgia crónica y se requiere alta sospecha clínica para lograr un manejo adecuado. Este artículo es valioso al presentar un caso clínico confirmado de SZE en Colombia, destacando la importancia de producir bibliografía científica local para mejorar el diagnóstico y tratamiento de esta patología.

Less-than-subtotal parathyroidectomy as treatment for primary hyperparathyroidism in multiple endocrine neoplasiatype 1: a good option?

Introduction: Multiple endocrine neoplasia type 1 (MEN1) is a genetic syndrome manifested initially as primary hyperparathyroidism (HPT/MEN 1). The treatment is classically surgical with total parathyroidectomy with autograft or subtotal parathyroidectomy. In order to maintain normal postoperative function, less than subtotal parathyroidectomy (LTSPTx) has been suggested as an alternative technique. Objective: Analyse critically LTSPTx as a treatment option for patients with HPT/MEN 1. Methods: A retrospective cohort study of patients submitted to LTSPTx from january 2011 to december 2018. Data from demographics, laboratory tests, 6 months postoperative clinical outcomes, intraoperative PTH values and localization studies were analized. Results: LTSPTx was performed non-intentionally in 13 patients and intentionally in 13 other cases; 17 females and 9 males. The mean age was 44 years, but in patients with identified mutation it was 37 years. Seventeen patients (65.4%) had normal parathyroid function, 5 (19.2%) had hypoparathyroidism, in all of them LTSPTx was performed non intentionally. Four patients (15.4%) had persistence, all submitted intentionally to LTSPTx. The mean intraoperative PTH drop was 85.5% (±10.4%), without difference intergroup. A patient with persistence had PTH intraoperative drop > 80%, which also occurred in another patient with postoperative hypoparathyroidism. No persistence was found in patients with concordant image exams, what happened in three cases with non-concordant studies. Conclusion: LTSPTx may be intentionally performed as treatment for HPT/MEN 1, however social aspects, technical expertise, image exams and patient expectations must be taken into account.

Multiple Endocrine Neoplasia Type 2B (MEN2B) delayed diagnosis: importance of opportune recognition of MEN2 Syndromes in pediatric thyroid cancer

ABSTRACT Background: RET proto-oncogene mutations are responsible for familial thyroid medullary carcinoma and multiple endocrine neoplasia (MEN) type 2A and 2B. These syndromes develop specific biomarkers and, in the case of MEN2B, clinically observable stigmas. However, the diagnosis of patients with MEN2B is usually delayed. Because of the close genotype-phenotype correlation, molecular testing is the final approach for the diagnosis to establish preventive care and therapeutic behaviors. Discussion: pM918T is classified as ''highest risk'' for medullary carcinoma with a 50% of lifetime risk for developing pheochromocytoma. Most cases of MEN2B are due to a de novo mutation. Even with the increased risk of developing pheochromocytoma, our 24-year-old patient does not yet present one. Other factors may be involved in the modulation of the phenotype in different populations. Case report: We present the case of a woman diagnosed with a thyroid nodule at the age of nine. She underwent a total thyroidectomy plus radical cervical lymph node dissection, with a diagnosis and initial management of papillary thyroid carcinoma. During the evolution of the disease, she developed pulmonary metastases. At the age of 24, after her first endocrinological evaluation, typical physical manifestations of MEN2B were observed. A re-evaluation of the original thyroidectomy revealed a medullary carcinoma, with positive manifestation CEA and calcitonin. The analysis of RET proto-oncogene identified a de novo mutation in exon 16 (pM918T). Conclusion: The timely diagnosis of MEN2B offers opportunities to make appropriate preventive and therapeutic decisions that may change the natural evolution of the disease and its complications.

A Case of Asymptomatic Multiple Endocrine Neoplasia Type I with Thymic Carcinoid

Multiple endocrine neoplasia type 1 (MEN 1) is an autosomal dominant hereditary disorder caused by germline mutation of the MEN1 gene. It is characterized by tumors of the anterior pituitary gland, parathyroid glands, and endocrine pancreas. Thymic carcinoid tumor is uncommon and associated with a high mortality, but its natural history has not been investigated yet. We report a case of asymptomatic MEN 1 with a thymic carcinoid tumor. A 37-year-old man underwent a routine medical checkup and upper gastrointestinal endoscopy revealed a duodenal neuroendocrine tumor (NET). Further studies showed the coexistence of pancreatic tumor, parathyroid hyperplasia, pituitary adenoma, and thymoma. The patient underwent duodenal endoscopic mucosal resection, distal pancreatectomy, subtotal parathyroidectomy, and thymectomy. The pathological test revealed a duodenal NET, pancreatic NET, parathyroid hyperplasia, and thymic carcinoid tumor. He was treated for MEN 1. We report this asymptomatic case of MEN 1 with a literature review.

Atypical Thymic Carcinoid in a Patient with Zollinger-Ellison Syndrome / 대한흉부외과학회지

Atypical thymic carcinoid is an extremely rare tumor with a poor prognosis. In addition to its known association with multiple endocrine neoplasia type 1, its hallmark characteristics include local invasion and early distant metastasis. In this report, we share our experience treating atypical thymic carcinoid in a patient with Zollinger-Ellison syndrome.

Ultrasound diagnosis of type 2 multiple endocrine neoplasm: A report of 2 cases / 第二军医大学学报

ObjectiveTo explore the pathogeneic characteristics and ideas of ultrasonic diagnosis of type 2 multiple endocrine neoplasm (MEN-2) , so as to improve the clinical diagnosis rate. Methods The clinical data of 2 patients with pathologically confirmed MEN-2 in Changzheng Hospital of Naval Medical University (Second Military Medical University) were retrospectively analyzed. The pathogenic characteristics of 2 patients were summarized. The process of ultrasound diagnosis was discussed, and the ideas of ultrasound diagnosis was summarized. ResultsPatient 1 presented with hypertension. Abdominal ultrasonography showed multiple pheochromocytomas in the bilateral adrenal glands, which attracted attention because of bilateral involvement. Further examination of other endocrine glands revealed that the right upper and middle thyroid junction had an occupation, and there was no abnormality in the pancreas. Ultrasound finally diagnosed medullary thyroid carcinoma. Patient 2 had recurrent urinary calculi for many years. Considering its symptoms might be caused by hyperparathyroidism, we performed ultrasonography and found hyperplasia of parathyroid gland and medullary thyroid cancer. Therefore, we further examined several endocrine organs such as pancreas and adrenal gland, and finally found pheochromocytoma of adrenal gland. Based on the different clinical symptoms of the 2 patients, we made accurate diagnoses through ultrasound examination of endocrine glands associated with multiple lesions combined with pathological results. ConclusionMEN-2 has a variety of clinical manifestations and is difficult to diagnose. It is helpful for early diagnosis of MEN-2, a multi-organ involvement disease, by mastering its pathogenic characteristics, clinical characteristics and ultrasound diagnosis ideas.

Surgical management of concomitant pancreatic neuroendocrine tumors inhereditary tumor syndromes / 中国实用外科杂志

Pancreatic neuroendocrine neoplasms(pNENs)might present as part of complex hereditary(familial)syndromes caused by germline mutations such as multiple endocrine neoplasia type 1(MEN1),von Hippel-Lindau disease(VHL),tuberous sclerosis,and neurofibromatosis type1(NF1).Increasing knowledge of hereditary pNENs in both their genetic underpinnings and clinical implications has affected the entire spectrum of their surgical management.However,the appropriate surgical timing and management of concomitant pNENs inhereditary tumor syndromes is still debated.

Rara presentación de polineuropatía distal hipoglicémica causada por un insulinoma en el contexto de una neoplasia endocrinamúltiple tipo 1 / An unusual presentation of hypoglycemic distal polyneuropathy caused by an insulinoma in the context of multiple endocrine neoplasia 1

La neoplasia endocrina múltiple tipo 1 es una enfermedad de rara presentación. Se caracteriza por el compromiso tumoral neuroendocrino, de paratiroides, hipófisis y enteropancreático. Presentamos el caso de una paciente de 19 años con síntomas de cefalea, convulsiones y debilidad de las cuatro extremidades. Se confirmó la presencia de hipoglicemia 33mg/dL. El estudio elecromiográfico evidenció polineuropatía sensitivo motora en las cuatro extremidades. La resonancia magnética abdominal mostró un tumor en la cola del páncreas que luego de la pancreatectomía se confirmó como insulinoma. La glicemia se normalizó. Además, presentó un macroadenoma hipofisario, hiperparatiroidismo primario y tumor adrenal no funcionante. A los 25 años presentó cefalea intensa y amaurosis de ojo derecho, en la tomografía axial se evidenció tumoración hipofisaria gigante y en estudio de patología se diagnosticó neoplasia maligna condroide (cordoma).

Multiple endocrine neoplasia type 1 is a rare disease. It is characterized by the neuroendocrine, parathyroid, pituitary, and enteropancreatic tumor involvement. We present the case of a 19 year old patient with symptoms of headache, convulsions and weakness of the four extremities. The presence of hypoglycemia 33mg/dL was confirmed. The electromyographic study showed motor sensory polyneuropathy in all four extremities. The abdominal magnetic resonance showed a tumor in the tail of the pancreas that after the pancreatectomy was confirmed as insulinoma. The glycemia was normalized. In addition, he presented a pituitary macroadenoma, primary hyperparathyroidism and non-functioning adrenal tumor. At 25 years of age, he presented severe headache and amaurosis of the right eye. Axial tomography showed a giant pituitary tumor and in the study of pathology chondroid malignancy (chordoma) was diagnosed.

Síndromes de neoplasia endocrina múltiple: revisión radiológica / Multiple Endocrine Neoplasia Syndromes: Radiological Review

Los síndromes de neoplasia endocrina múltiple (MEN), incluyen una serie de enfermedades con alteraciones genéticas que se caracterizan por la presencia de tumores que afectan a dos o más glándulas endocrinas. Son síndromes con una herencia autosómica dominante e incluyen tres patrones: MEN 1 (síndrome de Wermer), MEN 2 (que incluye MEN 2A o síndrome de Sipple y MEN 2B o síndrome de Wagenmann-Froboese) y MEN 4. Los adenomas paratiroideos y el carcinoma medular tiroideo, son los tumores más frecuentes del MEN tipo 1 y 2 respectivamente. Esos síndromes son más comunes en pacientes jóvenes, con patología de afectación bilateral, múltiple o multifocal y, sobre todo, en pacientes con antecedentes familiares. Es necesario el trabajo en equipo de endocrinólogos, cirujanos, oncólogos y radiólogos para optimizar el tratamiento de esos pacientes.

Multiple endocrine neoplasia (MEN) encompasses a serial of familial genetically disorders in wich tumors simultaneusly occur in two or more endocrine organs. MEN síndromes are autosomal-dominant disorders categorized into three main patterns: MEN 1 (Wermer syndrome), MEN 2 (includes MEN 2A o Sipple syndrome and MEN 2B o Wagenmann-Froboese syndrome) and MEN 4. Parathyroid adenomas and medullary thyroid carcinoma are the most frecuent tumors in MEN 1 and MEN 2 respectively. These entities will be suspected in younger patients, bilateral, multiple or multifocal disease and, specially, in patients with family background. Cooperation between endocrinologist, surgeons, oncologists and radiologists is pivotal for optimizing patient treatment.

Multiple Endocrine Neoplasia Type 2b Syndrome: A Rare Case Presentation

Multiple endocrine neoplasia Type 2b is a rare syndrome caused by mutations in RET proto oncogene. It is a rare entity, which is found 1 in 30,000 people. We report a case of 35–year–old male patient who presented with 1 episode of syncope; had bumpy lips and mucosal neuromas over the tongue which on detailed biochemical and radiological investigations turned out to be MEN Type 2B syndrome