In memoriam: Las aportaciones micrográficas del valenciano Luis Simarro (1851-1921) / In memoriam: The histological contributions of Dr. Luis Simarro (1851-1921)

El pasado 19 de junio del 2021, se cumplió el centenario de la muerte del histólogo valenciano Luis Simarro Lacabra (1851-1921). La figura de Simarro prácticamente ha desaparecido, en el momento actual, de la memoria del panorama científico y cultural español, siendo sus aportaciones micrográficas escasamente conocidas, probablemente debido a que su producción científica escrita fue muy reducida. En el presente trabajo, las aportaciones micrográficas de Simarro, de las que tenemos conocimiento, son revisadas en el contexto de su biografía, analizando su influencia en el origen y desarrollo de la escuela neurohistológica española que, liderada por Santiago Ramón y Cajal, es hoy universalmente reconocida.(AU)

The centenary of the death of the Valencian histologist Luis Simarro Lacabra (1851-1921) was celebrated on the 19th of June 2021. However, today little of his work is remembered and his valuable contribution to histology is scarcely known. This is probably due to his limited publications. We review Simarro's histological research in the context of his biography and analyse how it influenced Santiago Ramón y Cajal and the development of neurohistology.(AU)

Axonemal Symmetry Break, a New Ultrastructural Diagnostic Tool for Primary Ciliary Dyskinesia?

Diagnosis testing for primary ciliary dyskinesia (PCD) requires a combination of investigations that includes study of ciliary beat pattern by high-speed video-microscopy, genetic testing and assessment of the ciliary ultrastructure by transmission electron microscopy (TEM). Historically, TEM was considered to be the "gold standard" for the diagnosis of PCD. However, with the advances in molecular genetic techniques, an increasing number of PCD variants show normal ultrastructure and cannot be diagnosed by TEM. During ultrastructural assessment of ciliary biopsies of patients with suspicion of PCD, we observed an axonemal defect not previously described that affects peripheral doublets tilting. To further characterize this defect of unknown significance, we studied the ciliary axonemes by TEM from both PCD-confirmed patients and patients with other sino-pulmonary diseases. We detected peripheral doublets tilting in all the PCD patients, without any significant difference in the distribution of ciliary beat pattern or mutated gene. This defect was also present in those patients with normal ultrastructure PCD subtypes. We believe that the performance of axonemal asymmetry analysis would be helpful to enhance diagnosis of PCD.

Value of KI-67/MIB-1 labeling index and simpson grading system to predict the recurrence of who grade I intracranial meningiomas compared to who grade II.

Simpson grading of resection has been used as a predictor of intracranial meningioma (IM) recurrence. Histopathological findings, like the Ki-67/MIB-1 labeling index, may be useful in the assessment risk of recurrence. Our objective was to analyze the predictive value of meningioma recurrence using both parameters. We retrospectively studied 322 consecutive patients with histopathological diagnosis of IM WHO grade I and 43 patients with IM WHO grade II in a 13-year period. Multivariate survival analysis was performed. In the WHO grade I IM group, recurrence was observed in 28 patients (8.69%). The Cox regression model for WHO grade I IM, provided a significative hazard ratio (HR) for Ki-67/MIB-1 index ≥3 (HR = 36.35, p < 0.001) and Simpson's grading resection, grade II (HR = 2.03, p = 0.045), grade III (HR = 3.41, p = 0.034) and grade IV (HR = 19.75, p ≥ 0.001). In the WHO grade II IM group, recurrence was observed in 10 patients (23.25%). The Cox regression model for WHO grade II IM, provided a significative hazard ratio (HR) for Ki-67/MIB-1 index ≥3% (HR = 1.66, p < 0.001) and Simpson's grading resection grade III (HR = 3.96, p = 0.027). The Kaplan-Meier survival curve showed a similar distribution of survival between WHO grade I IM with Ki-67/MIB-1 ≥3% and WHO grade II IM. In WHO grade I meningiomas, the Ki-67/MIB-1 index and Simpson grading were both independent predictors of recurrence. A similar management protocol should be advisable for WHO grade I with Ki-67/MIB-1 ≥3% and WHO grade II meningiomas.

Intratumoral immunosuppression profiles in 11q-deleted neuroblastomas provide new potential therapeutic targets.

High-risk neuroblastoma (NB) patients with 11q deletion frequently undergo late but consecutive relapse cycles with fatal outcome. To date, no actionable targets to improve current multimodal treatment have been identified. We analyzed immune microenvironment and genetic profiles of high-risk NB correlating with 11q immune status. We show in two independent cohorts that 11q-deleted NB exhibits various immune inhibitory mechanisms, including increased CD4+ resting T cells and M2 macrophages, higher expression of programmed death-ligand 1, interleukin-10, transforming growth factor-beta-1, and indoleamine 2,3-dioxygenase 1 (P < 0.05), and also higher chromosomal breakages (P ≤ 0.02) and hemizygosity of immunosuppressive miRNAs than MYCN-amplified and other 11q-nondeleted high-risk NB. We also analyzed benefits of maintenance treatment in 83 high-risk stage M NB patients focusing on 11q status, either with standard anti-GD2 immunotherapy (n = 50) or previous retinoic acid-based therapy alone (n = 33). Immunotherapy associated with higher EFS (50 vs. 30, P = 0.028) and OS (72 vs. 52, P = 0.047) at 3 years in the overall population. Despite benefits from standard anti-GD2 immunotherapy in high-risk NB patients, those with 11q deletion still face poor outcome. This NB subgroup displays intratumoral immune suppression profiles, revealing a potential therapeutic strategy with combination immunotherapy to circumvent this immune checkpoint blockade.

Épulis congénito gigante: importancia del diagnóstico prenatal / Congenital giant cell epulis: Importance of the prenatal diagnosis

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Tumor del estroma gastrointestinal y schwannoma gástricos: una presentación inusual en un paciente sin neurofibromatosis / Gastric gastrointestinal stromal tumour and schwannoma: an unusual presentation in a patient without neurofibromatosis

Actualmente, la mayoría de las neoplasias presentes en el estómago son de tipo epitelial, constituyendo el subtipo más frecuente. El siguiente subtipo de tumor más común es el estromal, siendo el tumor del estroma gastrointestinal el más frecuente, seguido por el leiomioma y el schwannoma. En el presente artículo mostramos el caso excepcional de un paciente con un tumor del estroma gastrointestinal y sospecha de enfermedad residual gástrica, la cual fue diagnosticada posteriormente como schwannoma tras su exéresis

The majority of gastric neoplasms are of epithelial type. Stromal tumours are the next most frequent and are most commonly gastrointestinal stromal tumours, followed by leiomyoma and schwannoma. We present an exceptional case of a patient with a gastrointestinal stromal tumour with suspicion of residual gastric disease, which was diagnosed post-operatively as a schwannoma

[Gastric gastrointestinal stromal tumour and schwannoma: An unusual presentation in a patient without neurofibromatosis]. / Tumor del estroma gastrointestinal y schwannoma gástricos: una presentación inusual en un paciente sin neurofibromatosis.

The majority of gastric neoplasms are of epithelial type. Stromal tumours are the next most frequent and are most commonly gastrointestinal stromal tumours, followed by leiomyoma and schwannoma. We present an exceptional case of a patient with a gastrointestinal stromal tumour with suspicion of residual gastric disease, which was diagnosed post-operatively as a schwannoma.

The Frequency and Prognostic Significance of the Histologic Type in Early-stage Ovarian Carcinoma: A Reclassification Study by the Spanish Group for Ovarian Cancer Research (GEICO).

The frequency and prognostic significance of the histologic type in early-stage ovarian cancer (OC) is not as well established as in advanced stages. In addition, histologic typing based only on morphologic features may be difficult, especially in high-grade tumors. In this study, we have analyzed a prospective cohort of 502 early-stage OCs to investigate their frequency, immunohistochemical characteristics, and survival of the 5 main histologic types. Histotype was assigned according to not only the morphologic features but also according to the expression pattern of WT1, p53, Napsin A, and progesterone receptors. In addition, an extended panel including p16, ß-catenin, HER2, Arid1A, HINF1B, CK7, CDX2, and CK20 was used to refine the diagnosis in difficult cases. In this series, the frequency of the 5 major histologic types was as follows: endometrioid carcinoma, 32.7%; clear cell carcinoma, 25.1%; high-grade serous carcinoma (HGSC), 24.7%; mucinous carcinoma, 10.2%; low-grade serous carcinoma, 4.6%; and others, 2.8%. The combination of morphology and immunohistochemistry allowed the reclassification of 23% of OCs. The lowest concordance was found between samples initially diagnosed as endometrioid, but finally classified as high-grade serous tumors (22% error rate). Endometrioid carcinoma was the most favorable histologic type, whereas HGSC and low-grade serous carcinoma had the worst prognosis. Clear cell carcinoma with abnormal p53 immunostaining pattern also had poor prognosis. Although histologic grade was not a prognostic factor among early-stage endometrioid OCs, distinction between grade 3 endometrioid OC and HGSC is recommended, taking into account differences in prognosis and molecular alterations that can guide different treatments.

Carcinoma tubuloquístico. Una entidad infrecuente en la patología tumoral renal / Tubulocystic renal cell carcinoma. A rare entity in neoplastic renal pathology

El carcinoma renal tubuloquístico es una neoplasia infrecuente dentro de la patología tumoral renal. En el presente caso comentamos la evolución de un paciente con cólicos nefríticos de repetición en el que durante el seguimiento ecográfico se descubrió una lesión nodular de aspecto quístico. Posteriormente la lesión aumentó de tamaño y se decidió nefrectomía parcial (tumorectomía). En el examen histológico e inmunohistoquímico se estableció el diagnóstico de carcinoma renal tubuloquístico

Tubulocystic renal carcinoma is an uncommon neoplasm. We present a case of a patient presenting with multiple renal colic. A nodular cystic lesion was an incidental sonographic finding which increased in size during subsequent follow-ups. The patient underwent radical nephrectomy and tubular renal carcinoma was diagnosed histopathologically and immunohistochemically

[Tubulocystic renal cell carcinoma. A rare entity in neoplastic renal pathology]. / Carcinoma tubuloquístico. Una entidad infrecuente en la patología tumoral renal.

Tubulocystic renal carcinoma is an uncommon neoplasm. We present a case of a patient presenting with multiple renal colic. A nodular cystic lesion was an incidental sonographic finding which increased in size during subsequent follow-ups. The patient underwent radical nephrectomy and tubular renal carcinoma was diagnosed histopathologically and immunohistochemically.

Orthokeratinized odontogenic cysts: a Spanish tertiary care centre study based on HPV DNA detection.

BACKGROUND: The role of human papillomavirus (HPV) in orthokeratinized odontogenic cysts (OOCs) has rarely been studied. The objective is to describe the clinicopathological findings in a series of OOCs from a Spanish population that were investigated in relation to the possible presence of HPV. METHODS: A clinicopathological retrospective analysis followed by a molecular analysis of 28 high- and low-risk HPV genotypes was performed in OOC samples of patients seen during the last 15-years in a Spanish tertiary care center. RESULTS: Of 115 odontogenic cysts with keratinization, 16 cases of OOCs were confirmed and evaluated. OOCs occurred predominantly in the mandible of males (mean age 36.06 ± 13.16 years). Swelling of the jaw followed by pain were the most common clinical symptoms, and 56.5% of the OOC cases were associated with an unerupted tooth. After a mean post-cystectomy follow-up of 3.8 years, only one recurrent case was observed, resulting in a verrucous cystic lesion that was considered premalignant after immunohistological examination. DNA extraction was successful from 14 of the 16 OOC cases. None of the primary OCCs or the single recurrent OOC were positive for HPV in the molecular analysis. CONCLUSIONS: OOCs show a very limited potential for recurrence. Our results suggest that neither high- or low-risk HPV subtypes are likely to play a role in the etiology or neoplastic transformation of OOC, at least in the Spanish population.

Palatal ancient schwannoma: optical, immunohistochemical and ultrastructural study with literature review.

Schwannoma or neurilemmoma is a benign encapsulated slow-growing tumor that originates from a Schwann cell of a nerve, and is rare at intraoral locations. Different histological variants of schwannomas have been described, of these degenerative or ancient schwannoma is probably one of the least common in the oral cavity with only 16 previously reported cases, of which only one has been described in palatal location. Although ancient schwannoma shows particular characteristics, it is difficult to diagnose based on clinical and imaging appearance alone; as a result, morphological examination assisted by ancillary techniques is necessary to establish a definite diagnosis. We present a clinicopathological description of this rare variant of schwannoma, located in an unusual intraoral site, of a 26-year-old female. We illustrate the optical, immunohistochemical and ultrastructural characterization that aid diagnosis, as well as providing a review of the relevant published data of this unusual tumor.

Mortalidad perioperatoria del trasplante pulmonar en la enfermedad pulmonar obstructiva crónica / Perioperative mortality of lung transplantation in chronic obstructive pulmonary disease

Introducción: El trasplante pulmonar (TP) es una alternativa terapéutica en pacientes con EPOC en fase terminal. Nuestro objetivo es analizar la mortalidad perioperatoria (30 días) (MP) y los factores de riesgo que la condicionan en pacientes con EPOC sometidos a TP. Pacientes y método: Cohorte retrospectiva de 107 pacientes con EPOC trasplantados en el Hospital Universitario La Fe (1991-2008). Los datos demográficos, el grado de disnea, el diagnóstico, el índice BODE, el tipo de trasplante, la circulación extracorpórea, la edad del donante, la dependencia de glucocorticoides, la presencia de bronquiectasias, la reperfusión retrógrada, la transfusión de hemoderivados y la relación PaO2/FiO2 fueron analizadas. Las variables continuas se expresaron como media ± DE y las categóricas, con frecuencias absolutas y porcentajes. El análisis multivariante se realizó mediante el modelo de regresión de Cox. Resultados: Se trasplantaron 94 hombres y 13 mujeres con una edad media de 52,58 ± 8,05 años. El 75% de los pacientes tuvieron un BODE ≥ 7. Se realizaron 76 procedimientos bipulmonares. La MP fue del 14%. Las causas de muerte fueron las infecciones (53,3%) y las complicaciones quirúrgicas (33,3%). La presencia de bronquiectasias, el uso de glucocorticoides, la diferencia de talla entre receptor/donante y la presencia de émbolos grasos en la reperfusión retrógrada fueron factores de riesgo para la MP. La relación de PaO2/FiO2 a las 6 h fue un factor protector para la MP. Conclusiones: El TP es un procedimiento con una elevada tasa de MP. El uso previo de glucocorticoides, la presencia de bronquiectasias y de émbolos grasos en la reperfusión retrógrada, así como la PaO2/FiO2condicionaron la MP (AU)

Introduction: Lung transplantation (LT) has been considered an alternative therapeutic approach in terminal patients. However, this process in COPD is not controversy-free. This paper aimed to analyze 30-day mortality (PM) patterns and their risk factors in COPD patients undergoing LT. Patients and method: A retrospective cohort with 107 COPD patients, transplanted at the University La Fe Valencia, Spain, treated from January 1991 to December 2008. Demographics values, degree of dyspnoea, diagnosis, BODE index, single versus bilateral LT, cardio-pulmonary bypass, donor age, steroid dependence, presence of bronchiectasis, retrograde perfusion, transfusion of blood products, and PaO2/FiO2 were analyzed. Continuous variables were expressed as mean ± SD and categorical variables as absolute frequency and percentage. A Cox regression model was used for multivariate analysis. Results: Ninety-four men and 13 women of a mean age of 52.58 ± 8.05 years were transplanted. Of all patients, 75% obtained a BODE score above 7. There were 76 bilateral LT. PM was established at 14%. Main causes of death were infection (53.3%) and surgical complications (33.3%). Presence of bronchiectasis and chronic use of corticosteroids, donor/recipient difference in size and presence of fat in retrograde perfusion fluid were important risk factors for PM. Moreover, PaO2/FiO2 ratio at 6 h was a protective factor for the event, thus a higher ratio value, lowered the risk of PM. Conclusions: LT is a procedure with a high PM rate. Use of corticosteroids, the presence of bronchiectasis and fat emboli in the retrograde reperfusion, and PaO2/FiO2 significantly determine PM (AU)

[Perioperative mortality of lung transplantation in chronic obstructive pulmonary disease]. / Mortalidad perioperatoria del trasplante pulmonar en la enfermedad pulmonar obstructiva crónica.

INTRODUCTION: Lung transplantation (LT) has been considered an alternative therapeutic approach in terminal patients. However, this process in COPD is not controversy-free. This paper aimed to analyze 30-day mortality (PM) patterns and their risk factors in COPD patients undergoing LT. PATIENTS AND METHOD: A retrospective cohort with 107 COPD patients, transplanted at the University La Fe Valencia, Spain, treated from January 1991 to December 2008. Demographics values, degree of dyspnoea, diagnosis, BODE index, single versus bilateral LT, cardio-pulmonary bypass, donor age, steroid dependence, presence of bronchiectasis, retrograde perfusion, transfusion of blood products, and PaO2/FiO2 were analyzed. Continuous variables were expressed as mean±SD and categorical variables as absolute frequency and percentage. A Cox regression model was used for multivariate analysis. RESULTS: Ninety-four men and 13 women of a mean age of 52.58±8.05 years were transplanted. Of all patients, 75% obtained a BODE score above 7. There were 76 bilateral LT. PM was established at 14%. Main causes of death were infection (53.3%) and surgical complications (33.3%). Presence of bronchiectasis and chronic use of corticosteroids, donor/recipient difference in size and presence of fat in retrograde perfusion fluid were important risk factors for PM. Moreover, PaO2/FiO2 ratio at 6h was a protective factor for the event, thus a higher ratio value, lowered the risk of PM. CONCLUSIONS: LT is a procedure with a high PM rate. Use of corticosteroids, the presence of bronchiectasis and fat emboli in the retrograde reperfusion, and PaO2/FiO2 significantly determine PM.

Immunohistochemical expression of glucose transporter 1 in keratin-producing odontogenic cysts.

BACKGROUND: Keratin-producing odontogenic cysts (KPOCs) are a group of cystic lesions that are often aggressive, with high rates of recurrence and multifocality. KPOCs included orthokeratinised odontogenic cyst (OOC) and parakeratotic odontogenic cysts, which are now considered true tumours denominated keratocystic odontogenic tumours (KCOTs). GLUT1 is a protein transporter that is involved in the active uptake of glucose across cell membranes and that is overexpressed in tumours in close correlation with the proliferation rate and positron emission tomography (PET) imaging results. METHODS: A series of 58 keratin-producing odontogenic cysts was evaluated histologically and immunohistochemically in terms of GLUT1 expression. Different data were correlated using the beta regression model in relation to histological type and immunohistochemical expression of GLUT1, which was quantified using two different morphological methods. RESULTS: KPOC cases comprised 12 OOCs and 46 KCOTs, the latter corresponding to 6 syndromic and 40 sporadic KCOTs. GLUT1 expression was very low in OOC cases compared with KCOT cases, with statistical significant differences when quantification was considered. Different GLUT1 localisation patterns were revealed by immunostaining, with the parabasal cells showing higher reactivity in KCOTs. However, among KCOTs cases, GLUT1 expression was unable to establish differences between syndromic and sporadic cases. CONCLUSIONS: GLUT1 expression differentiated between OOC and KCOT cases, with significantly higher expression in KCOTs, but did not differentiate between syndromic and sporadic KCOT cases. However, given the structural characteristics of KCOTs, we hypothesised that PET imaging methodology is probably not a useful diagnostic tool for KCOTs. Further studies of GLUT1 expression and PET examination in KCOT series are needed to confirm this last hypothesis.

Mortalidad en carcinoma pulmonar no microcítico resecado, con tamaño máximo de 3 cm y sin afectación ganglionar: análisis de riesgos competitivos / Mortality in early-stage, surgically resected non-small cell lung cancer less than 3 cm of size: Competing risk analysis

Fundamentos y objetivo: Los estudios de supervivencia en el carcinoma pulmonar no microcítico (CPNM) se basan, habitualmente, en el método de Kaplan-Meier. Sin embargo, otros factores, no contemplados por este método, pueden modificar la observación del suceso de interés. Existen modelos de incidencia acumulativa (IA) que, teniendo en cuenta estos riesgos competitivos, permiten estimaciones más precisas de la supervivencia y valorar el riesgo de muerte por otras causas. Nuestro objetivo es evaluar dichos modelos en pacientes operados de CPNM en estadio precoz. Pacientes y método: Estudio de 263 pacientes resecados de un CPNM con un diámetro ≤ 3 cm y sin afectación ganglionar (N0). Se analizaron variables demográfico-clínicas, morfopatológicas, quirúrgicas, clasificación TNM y evolución a largo plazo. Para el análisis de la IA se consideró suceso competitivo la mortalidad por otra causa. Para el análisis univariante se utilizó el método de Gray, y para el multivariante, el de Fine y Gray. Resultados: La mortalidad por CPNM fue del 19,4% a los 5 años y del 14,3% por otra causa. Ambas curvas se cruzaron a los 6,3 años, siendo la probabilidad de muerte por otra causa mayor a partir de este punto. En el análisis multivariante, condicionaron la mortalidad por cáncer la invasión pleural visceral (IPV) (p = 0,001) y la vascular (p = 0,020), mientras que para la mortalidad por otra causa diferente del cáncer lo fueron la edad > 50 años (p = 0,034), el tabaquismo (p = 0,009) y el índice de Charlson ≥ 2 (p = 0,000). Conclusiones: Mediante el método de IA, la IPV y la invasión vascular condicionaron la muerte por cáncer en CPNM > 3 cm y se determinaron cuáles fueron las causas no tumorales de muerte a largo plazo (AU)

Background and objective: Survival studies of non-small cell lung cancer (NSCLC) are usually based on the Kaplan-Meier method. However, other factors not covered by this method may modify the observation of the event of interest. There are models of cumulative incidence (CI), that take into account these competing risks, enabling more accurate survival estimates and evaluation of the risk of death from other causes. We aimed to evaluate these models in resected early-stage NSCLC patients. Patients and method: This study included 263 patients with resected NSCLC whose diameter was ≤ 3 cm without node involvement (N0). Demographic, clinical, morphopathological and surgical variables, TNM classification and long-term evolution were analysed. To analyse CI, death by another cause was considered to be competitive event. For the univariate analysis, Gray's method was used, while Fine and Gray's method was employed for the multivariate analysis. Results: Mortality by NSCLC was 19.4% at 5 years and 14.3% by another cause. Both curves crossed at 6.3 years, and probability of death by another cause became greater from this point. In multivariate analysis, cancer mortality was conditioned by visceral pleural invasion (VPI) (P = .001) and vascular invasion (P = .020), with age > 50 years (P = .034), smoking (P = .009) and the Charlson index ≥ 2 (P = .000) being by no cancer. Conclusions: By the method of CI, VPI and vascular invasion conditioned cancer death in NSCLC > 3 cm, while non-tumor causes of long-term death were determined (AU)

Quiste sinovial de articulación temporomandibular: presentación de un caso / Synovial cyst of the temporomandibular joint: presentation of a case

El quiste sinovial localizado en la articulación temporomandibular es una entidad rara, con pocos casos reportados en la literatura médica. Gaisford et al. fueron los primeros autores que informaron de un caso de quiste sinovial, patología que afecta más frecuentemente a articulaciones como la muñeca o la rodilla. Estos quistes están delimitados por células sinoviales, y pueden estar comunicados o ser independientes de la cavidad articular. Se han propuesto varias teorías para explicar la etiología de esta patología, un incremento de la presión en la cavidad articular causado por una inflamación o traumatismo puede ser clave para producir una herniación de la membrana sinovial dando lugar a la entidad. Entre los diagnósticos que hay que considerar ante una tumoración preauricular se encuentran los tumores de parótida, los quistes sebáceos, los gangliones y los quistes sinoviales, entre otros. El tratamiento quirúrgico es el tratamiento frecuentemente propuesto por la literatura, logrando una escasa tasa de recurrencia (AU)

A synovial cyst located in the temporomandibular joint is rare, with few cases reported in the medical literature. Gaisford et al. were the first authors to report a case of a synovial cyst. This a condition that more frequently affects joints such as the wrist or knee. These cysts are delimited by synovial cells, and may be connected to, or be independent of, the joint cavity. Several theories have been proposed to explain the etiology of this disease: an increase in pressure in the joint cavity caused by inflammation or trauma may be the reason that a herniation of the synovial membrane could be produced. Among the diagnoses to be considered when faced with a tumor are pre-auricular parotid tumors, sebaceous cysts, ganglia and synovial cysts, among others. Surgery is the treatment most frequently proposed in the literature, achieving a low rate of recurrence (AU)

Factores pronóstico en el carcinoma bronquial no microcítico menor de 3 centímetros (análisis actuarial, incidencia acumulativa y grupos de riesgo) / Prognostic factors in non-small cell lung cancer less than 3 centimeters: actuarial analysis, accumulative incidence and risk groups

Introducción: En la clasificación TNM, los factores determinantes del factor T en el carcinoma pulmonar no microcítico apenas han variado con el tiempo y todavía se basan únicamente en características anatómicas. Nuestro objetivo fue estudiar la influencia en la supervivencia de estos y otros factores de tipo morfopatológico. Métodos: Se incluyeron 263 pacientes sometidos a resección pulmonar por carcinoma pulmonar no microcítico en estadio I patológico y diámetro ≤ 3 cm. Se realizó un estudio de supervivencia y de estimación del riesgo competitivo observando variables clínicas, quirúrgicas y patológicas, siguiendo los métodos de análisis actuarial y de incidencia acumulativa, respectivamente. Posteriormente, se creó un modelo de riesgo de acuerdo con los resultados. Resultados: La supervivencia fue de 79,8 y 74,3% a los 5 y 10 años, respectivamente. Los factores con mejor pronóstico, estadísticamente significativo según el método actuarial fueron: presencia de síntomas, hábito tabáquico, FEV1 > 60%, número de ganglios resecados > 7, tipo histológico escamoso, ausencia de invasión vascular, ausencia de invasión pleural visceral y presencia de invasión bronquial lobar proximal. La edad < 50 años rozó la significación estadística. En el análisis multivariante entraron en regresión la invasión pleural visceral y la invasión vascular. El estudio de riesgo competitivo mostró una probabilidad de muerte por cáncer de 14,3 y 35,1% en 5 y 10 años, respectivamente. Las variables significativas en los análisis univariante y multivariante fueron similares excepto el FEV1 > 60%. Conclusiones: La presencia de invasión pleural visceral y la invasión vascular determina la supervivencia o el riesgo de muerte por carcinoma pulmonar no microcítico ≤ 3 cm y permiten elaborar un modelo predictivo de riesgo

Introduction: In TNM classification, factors determining the tumor (T) component in non-small cell lung cancer have scarcely changed over time and are still based solely on anatomical features. Our objective was to study the influence of these and other morphopathological factors on survival. Methods: A total of 263 patients undergoing lung resection due to stage I non-small cell lung cancer ≤ 3 cm in diameter were studied. A survival analysis and competing-risk estimate study was made on the basis of clinical, surgical and pathological variables using actuarial analysis and accumulative incidence methods, respectively. A risk model was then generated from the results Results: Survival at 5 and 10 years was 79.8 and 74.3%, respectively. The best prognostic factors were presence of symptoms, smoking habit and FEV1 > 60%, number of resected nodes > 7, squamous histology, absence of vascular invasion, absence of visceral pleural invasion and presence of invasion more proximal than the lobar bronchus. All these were statistically significant according to the actuarial method. The factor 'age < 50 years' was close to the margin of statistical significance. Pleural invasion and vascular invasion were entered in the multivariate analysis. The competing-risk analysis showed a probability of death due to cancer of 14.3 and 35.1% at 5 and 10 years, respectively. Significant variables in the univariate and multivariate analyses were similar, with the exception of FEV1 > 60%. Conclusions: Pleural invasion and vascular invasion determine survival or risk of death due to non-small cell lung cancer ≤ 3 cm and can be used for generating a predictive risk model

NCAM (CD56) expression in keratin-producing odontogenic cysts: aberrant expression in KCOT.

OBJECTIVE: To investigate immunohistochemically the expression of neural cell adhesion molecule (NCAM), which has been identified as a signaling receptor with frequent reactivity in ameloblastomas (AB), in a series of keratin-producing odontogenic cysts (KPOCs). MATERIAL AND METHODS: Immunohistochemical expression of NCAM, using a monoclonal antibody, was determined in a series of 58 KPOCs comprising 12 orthokeratinized odontogenic cysts (OOCs) and 46 keratocystic odontogenic tumors (KCOTs), corresponding to 40 non-syndromic KCOT (NS-KCOTs) and 6 syndromic KCOT (S-KCOTs), associated with nevic basocellular syndrome (NBCS). RESULTS: NCAM expression was negative in all OOCs, but 36.45% of KCOTs exhibited focal and heterogeneous expression at the basal cell level, as well as in basal budding areas and the basal cells of daughter cysts. The latter two locations were especially applicable to S-KCOTs, with focal NCAM reactivity occurring in 66.66% of cases. CONCLUSIONS: Aberrant NCAM expression, in KCOTs but especially in S-KCOTs, together with its immunomorphological location, suggests that this adhesion molecule and signaling receptor plays a role in the pathogenesis of KCOTs, with a probable impact on lesional recurrence.