Predictive model of resection in endoscopic endonasal approach for pituitary adenomas based on anatomical limits / Modelo predictivo de resección en abordaje endoscópico endonasal de adenomas hipofisarios basado en límites anatómicos

Introduction The aim of this project is to study several anatomical-radiological features of pituitary adenomas obtained from preoperative radiological images and to analyze their relationship with the extent of resection achieved through the endoscopic endonasal approach. The second objective was to create a prediction model of the extent of resection. Material and methods We retrospectively evaluated 105 patients. Tumor volume, Knosp grade, suprasellar-diaphragm coefficient and invasion of the posterior compartment have been analyzed. The extent of resection was assessed by analyzing the postoperative magnetic resonance. We created the predictive scale using statistically independent variables. Results When each of the variables has been studied individually, a statistically significant value of all of them is appreciated to obtain a complete resection. However, only the Knosp grade and the suprasellar-diaphragm coefficient had a statistically significant value as independent variables. The sum of the Odds Ratio obtained from the Knosp scale, and the suprasellar-diaphragm coefficient gives the probability of complete resection. A new set of cases was employed to validate the scale. Conclusions The cavernous sinus invasion and the newly designed suprasellar diaphragm coefficient are directly related to the extent of resection in pituitary adenoma surgery performed by a transellar endoscopic approach. Moreover, based on both radiologic factors, a predictive scale may predict the probability of complete resection in a series of patients (AU)

Introducción El objetivo principal de este proyecto es estudiar diversas variables anatomo-radiológicas de los adenomas hipofisarios obtenidas a partir de imágenes radiológicas preoperatorias y analizar su relación con el grado de resección logrado mediante el abordaje endoscopio endonasal. El segundo objetivo ha sido crear un modelo de predicción del grado de resección tumoral. Material y métodos Se ha evaluado retrospectivamente a 105 pacientes, analizando el volumen tumoral, el grado de Knosp, el coeficiente supraselar-diafragma y la invasión del compartimento posterior. El grado de resección se ha evaluado mediante el análisis de la resonancia magnética postoperatoria. Se ha creado la escala predictiva empleando variables estadísticamente independientes. Resultados Al estudiar cada una de las variables de forma individual, se aprecia un valor estadísticamente significativo en cada una de ellas para obtener una resección completa. Sin embargo, tan solo el grado de Knosp y el coeficiente supraselar-diafragma tuvieron un valor estadísticamente significativo como variables independientes. Empleando la suma de la odds ratio obtenida de la escala Knosp y el coeficiente supraselar-diafragma, se ha obtenido la probabilidad de resección completa. Se ha empleado un nuevo conjunto de casos para validar la escala. Conclusiones La invasión del seno cavernoso y el coeficiente supraselar-diafragma son variables que están directamente relacionadas con el grado de resección en la cirugía de adenoma hipofisario realizada mediante un abordaje endoscópico transellar. Además, basándose en ambos factores radiológicos, se ha creado una escala predictiva que permite predecir la probabilidad de resección completa en una serie de pacientes (AU)

Predictive model of resection in endoscopic endonasal approach for pituitary adenomas based on anatomical limits.

INTRODUCTION: The aim of this project is to study several anatomical-radiological features of pituitary adenomas obtained from preoperative radiological images and to analyze their relationship with the extent of resection achieved through the endoscopic endonasal approach. The second objective was to create a prediction model of the extent of resection. MATERIAL AND METHODS: We retrospectively evaluated 105 patients. Tumor volume, Knosp grade, suprasellar-diaphragm coefficient and invasion of the posterior compartment have been analyzed. The extent of resection was assessed by analyzing the postoperative magnetic resonance. We created the predictive scale using statistically independent variables. RESULTS: When each of the variables has been studied individually, a statistically significant value of all of them is appreciated to obtain a complete resection. However, only the Knosp grade and the suprasellar-diaphragm coefficient had a statistically significant value as independent variables. The sum of the Odds Ratio obtained from the Knosp scale, and the suprasellar-diaphragm coefficient gives the probability of complete resection. A new set of cases was employed to validate the scale. CONCLUSIONS: The cavernous sinus invasion and the newly designed suprasellar diaphragm coefficient are directly related to the extent of resection in pituitary adenoma surgery performed by a transellar endoscopic approach. Moreover, based on both radiologic factors, a predictive scale may predict the probability of complete resection in a series of patients.

Three-Dimensional Reconstruction of the Sphenoid Sinus Anatomy for Presurgical Planning with Free OSIRIX Software.

Background A preoperative three-dimensional (3D) surgical field understanding remains a key factor to achieve safer endonasal transsphenoidal endoscopic approaches (ETSE). The aim of this article is to describe how we can get a reliable 3D sphenoidal anatomical reconstruction for surgical planning by using a user-friendly, accurate, and free image software. Methods Free computer software (OSIRIX Medical Imaging Software) was used to create in a personal computer a three-dimensional (3D) reconstruction of the sphenoid sinus (SS) based on head computed tomography angiographies (CTAs) from a series of 67 patients who were operated for sellar tumors during a 4-year period (March 2016 to March 2020). The aim of the 3D reconstruction with OSIRIX was to reveal preoperatively the most important intrasphenoidal structures seen from the endonasal point of view. Results The intraoperative visible sphenoidal structures were previously recognized in the virtual 3D reconstructed image with 100% of specificity (SP) and positive predictive value. The OSIRIX view by using region of interest points allowed us to see preoperatively the internal carotid artery parasellar course even in those cases in which it was hidden by bone or tumor. Moreover, the 3D reconstruction was able to provide a clear differentiation between the tumor and the pituitary gland when both structures were in contact with the sellar floor. Conclusion Our experience with the OSIRIX software from CTA as preoperative planning for endonasal pituitary surgery was valuable, because it gave us access in simple way to a free and reliable 3D image of the SS.

MRI evidence of brain atrophy, white matter damage, and functional adaptive changes in patients with cervical spondylosis and prolonged spinal cord compression.

OBJECTIVES: To investigate the effect of cervical spondylosis (CS) in the brain with a combination of advanced neuroimaging techniques. METHODS: Twenty-seven patients with CS and 24 age- and gender-matched healthy controls were studied. Disease severity was quantified using the Modified Japanese Orthopaedic Association Scoring System (mJOHA). Magnetic resonance (MR) imaging of the brain and spinal cord, functional MR imaging (fMRI) with a bilateral rest/finger-tapping paradigm, brain diffusion tensor imaging (DTI), voxel-based morphometry (VBM), and MR spectroscopy of the sensorimotor cortex were performed. RESULTS: A total of 92.3% of patients had more than one herniated disc. In the MRI, 33.33% presented signs of myelopathy. The mJOHA score was 13.03 ± 2.83. Compared with controls, DTI results showed significant lower FA values in Corpus callosum, both corticospinal tracts and middle cerebellar peduncles (p < 0.05 corrected). Only in CS patients fMRI results showed activation in both globus pallidi, caudate nucleus, and left thalamus (p < 0.001). Subject-specific activation of the BOLD signal showed in CS patients lower activation in the sensorimotor cortex and increased activation in both cerebellum hemispheres (p < 0.05 corrected). VBM showed bilateral clusters of gray matter loss in the sensorimotor cortex and pulvinar nucleus (p < 0.05 corrected) of CS patients. NAA/Cr was reduced in the sensorimotor cortex of CS patients (p < 0.05). Linear discriminant and support vector machine analyses were able to classify > 97% of CS patients with parameters obtained from the fMRI, DTI, and MRS results. CONCLUSION: CS may lead to distal brain damage affecting the white and gray matter of the sensorimotor cortex causing brain atrophy and functional adaptive changes. KEY POINTS: • This study suggests that patients with cervical spondylosis may present anatomical and functional adaptive changes in the brain. • Cervical spondylosis may lead to white matter damage, gray matter volume loss, and functional adaptive changes in the sensorimotor cortex. • The results reported in this work may be of value to better understand the effect of prolonged cervical spine compression in the brain.

Cirugía endoscópica endonasal en adenomas hipofisarios: resultados quirúrgicos en una serie de 86 pacientes consecutivos / Endonasal endoscopic surgery in pituitary adenomas: Surgical results in a series of 86 consecutive patients

Introducción: El abordaje endoscópico endonasal se ha convertido en la técnica quirúrgica de elección para el tratamiento de los adenomas hipofisarios. Objetivos: El objetivo de este trabajo es presentar los resultados obtenidos en nuestro hospital en cirugía puramente endoscópica de los adenomas hipofisarios. Métodos: Hemos realizado un estudio prospectivo, recogiendo a los pacientes intervenidos de adenoma hipofisario mediante un abordaje endonasal puramente endoscópico, desde febrero de 2011 hasta agosto de 2016, obteniendo una muestra total de 86 pacientes. Todos los pacientes fueron intervenidos conjuntamente por un ORL y un neurocirujano con la técnica de four hands-two nostrils. El seguimiento medio postoperatorio fue de 32 meses. Todos los pacientes fueron evaluados según criterios clínicos, radiológicos y endocrinológicos. Resultados: En nuestra serie un 53% eran mujeres y un 47% hombres; el rango de edad variaba desde los 14 hasta los 84 años, siendo la media de 54 años. El síntoma inicial más habitual fue el déficit visual (42%), seguido por la hiperfunción hormonal (21%), siendo la acromegalia el síndrome clínico observado con más frecuencia. Los tumores más frecuentes fueron los no funcionantes (73%), y de entre los adenomas funcionantes el más frecuente fue el productor de GH (65%). En cuanto a tamaño tumoral, un 76% eran macroadenomas, un 11% microadenomas y un 13% gigantes. Un 63% presentaban extensión supraselar y un 37% invasión de seno cavernoso (grado de Knosp ≥3). Se consiguió una exéresis total en un 77% de los casos. Tras la intervención se consiguió en un 91% mejoría visual y hasta en un 73% remisión de la hiperfunción endocrina. En cuanto a las complicaciones, la más frecuente fue la insuficiencia de al menos un eje de la hipófisis anterior (9%), sin presentar casos de fístula de LCR posquirúrgica. Conclusiones: Nuestros resultados, en términos de calidad quirúrgica, se asemejan a las series publicadas y avalan la eficacia y seguridad del abordaje endoscópico endonasal como técnica de elección en el manejo quirúrgico de la glándula hipofisaria. Sin embargo, es necesario un estudio con mayor número de casos para obtener resultados con significación clínica

Introduction: The endoscopic endonasal approach has become the gold standard for the surgical treatment of pituitary adenomas. Objectives: The aim of this study is to present the results obtained in our hospital in purely endoscopic surgery of pituitary adenomas. Methods: From February 2011 to August 2016, we conducted a prospective study on a series of 86 patients with pituitary adenoma, all of whom underwent surgery with a purely endoscopic endonasal approach. The ‘four hands-two nostrils’ technique was performed in all cases by a surgical team composed of an ENT surgeon and a neurosurgeon. Mean follow-up was 32 months. All patients were evaluated according to clinical, radiological and endocrinological criteria. Results: In our series, 53% were women and 47% men. The age ranged from 14 to 84 years of age, with a mean of 54 years of age. The most common initial symptom was visual deficit (42%), followed by hormonal hyperfunction (21%), with acromegaly being the most common clinical syndrome. The most common tumours were non-functioning tumours (73%), while GH-secreting tumours (65%) were the most common functioning adenoma. Regarding tumour size, 76% were macroadenomas, 11% microadenomas and 13% giant adenomas. Approximately 63% of the adenomas exhibited suprasellar extension and 37% involved invasion of the cavernous sinus (Knosp grade ≥3). Total excision was achieved in 77% of the cases. After the intervention, visual improvement was achieved in 91% and remission of endocrine hyperfunction in up to a 73% of cases. The most common complication was anterior pituitary insufficiency of at least one axis (9%). There were no cases of postoperative cerebrospinal fluid fistula. Conclusions: In terms of surgical quality, our results are similar to those of published series, and demonstrate the efficacy and safety of the endoscopic endonasal approach as the surgical treatment of choice for pituitary adenomas. However, further studies with a higher sample size are necessary to obtain clinically significant results

[Endonasal endoscopic surgery in pituitary adenomas: Surgical results in a series of 86 consecutive patients]. / Cirugía endoscópica endonasal en adenomas hipofisarios: resultados quirúrgicos en una serie de 86 pacientes consecutivos.

INTRODUCTION: The endoscopic endonasal approach has become the gold standard for the surgical treatment of pituitary adenomas. OBJECTIVES: The aim of this study is to present the results obtained in our hospital in purely endoscopic surgery of pituitary adenomas. METHODS: From February 2011 to August 2016, we conducted a prospective study on a series of 86 patients with pituitary adenoma, all of whom underwent surgery with a purely endoscopic endonasal approach. The 'four hands-two nostrils' technique was performed in all cases by a surgical team composed of an ENT surgeon and a neurosurgeon. Mean follow-up was 32 months. All patients were evaluated according to clinical, radiological and endocrinological criteria. RESULTS: In our series, 53% were women and 47% men. The age ranged from 14 to 84 years of age, with a mean of 54 years of age. The most common initial symptom was visual deficit (42%), followed by hormonal hyperfunction (21%), with acromegaly being the most common clinical syndrome. The most common tumours were non-functioning tumours (73%), while GH-secreting tumours (65%) were the most common functioning adenoma. Regarding tumour size, 76% were macroadenomas, 11% microadenomas and 13% giant adenomas. Approximately 63% of the adenomas exhibited suprasellar extension and 37% involved invasion of the cavernous sinus (Knosp grade ≥3). Total excision was achieved in 77% of the cases. After the intervention, visual improvement was achieved in 91% and remission of endocrine hyperfunction in up to a 73% of cases. The most common complication was anterior pituitary insufficiency of at least one axis (9%). There were no cases of postoperative cerebrospinal fluid fistula. CONCLUSIONS: In terms of surgical quality, our results are similar to those of published series, and demonstrate the efficacy and safety of the endoscopic endonasal approach as the surgical treatment of choice for pituitary adenomas. However, further studies with a higher sample size are necessary to obtain clinically significant results.

Estudio endoscópico endonasal 3D de la anatomía de la base de cráneo / Three-dimensional endoscopic endonasal study of skull base anatomy

INTRODUCCIÓN: El entrenamiento en la disección de los senos paranasales y la base de cráneo es esencial para el conocimiento anatómico y la correcta aplicación de las técnicas quirúrgicas. La visualización tridimensional de la anatomía endoscópica de la base de cráneo mejora la orientación espacial y permite la percepción de profundidad. OBJETIVO: Mostrar la anatomía endoscópica de la base de cráneo basándose en la técnica tridimensional. MÉTODOS: Realizamos disección endoscópica endonasal en especímenes cadavéricos fijados con formol y con la técnica de Thiel, ambos con inyección intravascular de colorantes. Los abordajes fueron realizados con endoscopios convencionales 2D. Posteriormente aplicamos la técnica 3D anaglífica para ilustrar las figuras en 3D. RESULTADOS: Se ilustran las más importantes estructuras y referencias anatómicas de la región selar desde la perspectiva endonasal endoscópica en 3D. CONCLUSIÓN: La base del cráneo está compuesta por complejas estructuras óseas y neurovasculares. La experiencia con la disección en cadáver es crucial para comprender la anatomía y desarrollar habilidades quirúrgicas. La visualización 3D representa una útil herramienta para comprender la anatomía de la base de cráneo

INTRODUCTION: Training in dissection of the paranasal sinuses and the skull base is essential for anatomical understanding and correct surgical techniques. Three-dimensional (3D) visualisation of endoscopic skull base anatomy increases spatial orientation and allows depthperception. OBJECTIVE: To show endoscopic skull base anatomy based on the 3D technique. METHODS: We performed endoscopic dissection in cadaveric specimens fixed with formalin and with the Thiel technique, both prepared using intravascular injection of coloured material. Endonasal approaches were performed with conventional 2D endoscopes. Then we applied the 3D anaglyph technique to illustrate the pictures in 3D. RESULTS: The mostimportant anatomical structures and landmarks of the sellar region underendonasal endoscopic vision are illustrated in 3D images. CONCLUSION: The skull base consists of complex bony and neurovascular structures. Experience with cadaver dissection is essential to understand complex anatomy and developsurgical skills. A 3D view constitutes a useful tool for understanding skull base anatomy

[Three-dimensional endoscopic endonasal study of skull base anatomy]. / Estudio endoscópico endonasal 3D de la anatomía de la base de cráneo.

INTRODUCTION: Training in dissection of the paranasal sinuses and the skull base is essential for anatomical understanding and correct surgical techniques. Three-dimensional (3D) visualisation of endoscopic skull base anatomy increases spatial orientation and allows depth perception. OBJECTIVE: To show endoscopic skull base anatomy based on the 3D technique. METHODS: We performed endoscopic dissection in cadaveric specimens fixed with formalin and with the Thiel technique, both prepared using intravascular injection of coloured material. Endonasal approaches were performed with conventional 2D endoscopes. Then we applied the 3D anaglyph technique to illustrate the pictures in 3D. RESULTS: The most important anatomical structures and landmarks of the sellar region under endonasal endoscopic vision are illustrated in 3D images. CONCLUSION: The skull base consists of complex bony and neurovascular structures. Experience with cadaver dissection is essential to understand complex anatomy and develop surgical skills. A 3D view constitutes a useful tool for understanding skull base anatomy.

¿Existen diferencias en el manejo neuroquirúrgico de las lesiones intracraneales en la paciente gestante? Resultados de nuestra experiencia y revisión de la literatura / No disponible

Objetivo El objetivo principal de nuestro trabajo es revisar nuestra experiencia neuroquirúrgica en la paciente gestante y realizar una revisión de la literatura para optimizar el manejo neuroquirúrgico en este tipo de pacientes. Método Estudio retrospectivo entre agosto de 1993 y junio de 2010. Se incluyen aquellas pacientes que se encontraban en período de gestación y presentaban alguna entidad neuroquirúrgica craneal o raquídea. Resultados Fueron documentadas 12 pacientes con edades comprendidas entre 17 y 37 años, con una media de edad de 28,8 años. La media de semanas de gestación fue de 24,17, encontrándose el 50% de las pacientes en el tercer trimestre de embarazo en el momento del diagnóstico, el 25% en el segundo trimestre y el otro 25% en el primer trimestre. El seguimiento medio de las pacientes fue de 84 meses. Cuatro de las 12 pacientes presentaron patología vascular cerebral, cinco presentaron lesiones tumorales cerebrales, una paciente (..) (AU)

[Do differences exist in the neurosurgical handling of intracranial lesions of pregnant patient? Outcomes of our experience and literature review]. / ¿Existen diferencias en el manejo neuroquirúrgico de las lesiones intracraneales en la paciente gestante? Resultados de nuestra experiencia y revisión de la literatura.

OBJECTIVE: The main objective of our work is to revise our neurosurgical experience in pregnant patient and to carry out a revision of the related literature in order to optimize the neurosurgical handling of these kind of patients. METHOD: Retrospective study between august 1993 and June 2010. We included patients who were pregnant at the time and who presented any trace of cranial neurosurgical or spinal disease. RESULTS: The research includes the cases of 12 patients aged between 17 and 37 years old with an average age of 28.8 years old. The average gestation period was of 24.17 weeks, finding 50% of the patients within their third three-month period of pregnancy at the moment of diagnosis, 25% in their second three-month period and the remaining 25% in their first three-month period. The mean follow-up duration for this series was 84 months. 4 of them presented brain vascular lesions, 5 presented brain tumor lesions, 1 of them presented Chiari malformation, one lumbar disc herniation and 1 patient suffered from traumatic intracraneal hemorrhage. 8 of the 12 patients were subjected to neurosurgical procedures under general anesthetic, 2 for aneurysm embolizations and 2 for conservative treatments. Between the neurosurgical procedures 6 craniotomies were done, of wich 4 were to resection of the tumor and 2 for aneurysm clippings. There were done a transesfenoidal approach and a lumbar microdiscectomy. 2 of the 6 patients given craniotomies required external ventricular drainage before the operation. 5 elective cesareans were done in the group of patients given the craniotomies whilst of the rest the pregnancy was allowed to bring to term for reasons of pulmonary maturity. In our patients there were no cases of therapeutic abortion. There was found no morbidity no mortality neither in the mother nor in the fetus related to surgery. CONCLUSIONS: In our experience with pregnant patients who suffered from neurosurgical lesion and in the experience we got from the revision of the related literature, the surgery of intracranial lesions is well tolerated by the mothers and the fetus. It must though be considered, the possibility of labor through cesarean depending on the fetus' lung maturity.

Ependimoma de células gigantes de la cauda equina. A propósito de un caso / Giant cell ependymoma of the cauda equina. A case report

Los ependimomas constituyen la neoplasia más frecuente de la médula espinal. Se desarrollan a partir de células que revisten el canal ependimario. Un subtipo infrecuente es el ependimoma de células gigantes, del que se han descrito solo 8 casos en dicha localización. Describimos el caso de un varón de 42 años con lumbalgia de varios meses de evolución. La RMN mostró un tumor bien circunscrito intradural en L1, que se resecó en su totalidad. El estudio histológico demostró proliferación fusocelular de distribución perivascular con formación de pseudorrosetas y moderada atipia citológica con células gigantes multinucleadas. El estudio inmunohistoquímico confirmó el diagnóstico de ependimoma de células gigantes(AU)

Ependymomas are the most frequent neoplasms of the spinal cord, arising from the cells lining the spinal canal. Among them, giant cell ependymoma is a rare subtype with only 8 cases previously reported to date. We present a further case in a 42-year-old man who presented with a history of lower back pain for several months. The MRI revealed a well-circumscribed interdural mass at L1. The tumour was totally resected and histologically it was seen to be comprised of a proliferation of fusiform cells arranged in a perivascular pattern with pseudorosettes and cytologic atypia with multinucleated giant cells. Immunohistochemistry confirmed the diagnosis of giant cell ependymoma(AU)