305 research outputs found
Collision sellar lesions: experience with eight cases and review of the literature
The concomitant presence of a pituitary adenoma with a second sellar lesion in patients operated upon for pituitary adenoma is an uncommon entity. Although rare, quite a great variety of lesions have been indentified coexisting with pituitary adenomas. In fact, most combinations have been described before, but an overview with information on the frequency of combined pathologies in a large series has not been published. We present a series of eight collision sellar lesions indentified among 548 transsphenoidally resected pituitary adenomas in two Neurosurgical Departments. The histological studies confirmed a case of sarcoidosis within a non-functioning pituitary adenoma, a case of intrasellar schwannoma coexisting with growth hormone (GH) secreting adenoma, two Rathkeâs cleft cysts combined with pituitary adenomas, three gangliocytomas associated with GH-secreting adenomas, and a case of a double pituitary adenoma. The pertinent literature is discussed with emphasis on pathogenetic theories of dual sellar lesions. Although there is no direct evidence to confirm the pathogenetic relationship of collision sellar lesions, the number of cases presented in literature makes the theory of an incidental occurrence rather doubtful. Suggested hypotheses about a common embryonic origin or a potential interaction between pituitary adenomas and the immune system are presented
Endonasal Suturing of Nasoseptal Flap to Nasopharyngeal Fascia Using the V-Loc⢠Wound Closure Device: 2-Dimensional Operative Video
Commentary: Results of Transcranial Resection of Olfactory Groove Meningiomas in Relation to Imaging-Based Case Selection Criteria for the Endoscopic Approach
Subependymomas of the lateral ventricle: Tumor recurrence correlated with increased Ki-67 labeling index
Subependymomas of the lateral ventricles are rare tumors. We present
two patients with subependymomas of the lateral ventricle, who
underwent gross total resection of the tumor via transcallosal
approach. The patient, with increased Ki-67 labeling index had
recurrence of tumor two years after the initial operation. We emphasize
at the risk of recurrence which is probably correlated with Ki-67
labeling index
Endoscopic Endonasal Approach for Clival Chordoma with Subarachnoid Invasion: A Two-Dimensional Step-by-Step Operative Video
Contralateral transmaxillary corridor: an augmented endoscopic approach to the petrous apex
- âŚ