Histopathology of Parasellar Neoplasms

Histopathology of gastrointestinal neuroendocrine neoplasms

Gastrointestinal neuroendocrine neoplasms (GI-NENs) arise from neuroendocrine cells distributed mainly in the mucosa and submucosa of the gastrointestinal tract. In 2010, the World Health Organization (WHO) classification of NENs of the digestive system was changed, categorizing these tumors as grade 1 neuroendocrine tumor (NET), grade-2NET, neuroendocrine carcinoma (large- or small-cell type),...

Ovarian and Peritoneal Borderline Neoplasms: Histopathology, Diagnostic Pitfalls, and Prognostication.

Ovarian epithelial cancer affects over 26,000 American women annually, and it accounts for approximately 5% of all cancers exclusive of cutaneous epithelial malignancies and many in situ carcinomas except bladder.[1] Over 80% of ovarian carcinomas are of surface epithelial origin.[2] Ovarian surface epithelial cancer represents approximately 50% of all pelvic malignancies and kills annually mor...

Pituitary and Parasellar Surgery

Sellar and parasellar abnormalities

1. Attending Physician in the Neuroradiology Department, University of São Paulo Medical School (FMRP-USP), Radiologist at Cedirp, Ribeirão Preto, SP, Brazil. E-mail: [email protected]. The sellar and parasellar regions constitute an anatomically complex area comprising various important neurovascular structures within a small space. The sellar region includes the sella turcica and the pi...

Extraaxial parasellar cavernous hemangioma.

Intracranial cavernous hemangiomas (cavernomas) are uncommon vascular hamartomas that develop infrequently in an extracerebrallocation, with the middle cranial fossa being the most frequently reported site [1, 2]. Accurate presurgical diagnosis is not often achieved, and because of their location and propensity to bleed profusely during surgery, these tumors are usually impossible to resect com...