Impact of COVID-19 on Neurosurgery in Brazil's Health System: The Reality of a Developing Country Affected by the Pandemic.

Background: The coronavirus disease identified in 2019 (COVID-19) pandemic changed neurosurgery protocols to provide ongoing care for patients while ensuring the safety of health care workers. In Brazil, the rapid spread of the disease led to new challenges in the health system. Neurooncology practice was one of the most affected by the pandemic due to restricted elective procedures and new triage protocols.

Giant pituitary adenomas: surgical outcomes of 50 cases operated on by the endonasal endoscopic approach.

Objective: To present our experience with the surgical management of giant pituitary adenomas in a series of 50 cases operated on by an endoscopic endonasal approach.

Methods: A retrospective data analysis of all patients who underwent transsphenoidal endonasal endoscopic surgery at the General Hospital of Fortaleza, Brazil, between January 1998 and November 2011 was performed. Patients who presented with pituitary adenomas larger than 4 cm were included in the study.

Endoscopic endonasal approach for pituitary adenoma: surgical complications in 301 patients.

The authors investigate the complications of transnasal transsphenoidal endoscopic surgery in the treatment of 301 patients with pituitary adenomas. A retrospective analysis of complications in 301 patients submitted to transsphenoidal transnasal endoscopic surgery at the General Hospital of Fortaleza, Brazil between January 1998 and December 2009. The complications were divided in two groups: anatomical (oronasofacial, sphenoid sinus, intrasellar, suprasellar and parasellar) and endocrinological complications (anterior and posterior pituitary dysfunctions).

Pituitary stem cells: review of the literature and current understanding.

Background: The existence of pituitary stem cells in the adult pituitary gland is supported by such findings as postnatal proliferation, differentiation based on environmental alterations, and development of hormone-producing cells after specific lesions in the pituitary.

Objective: We discuss which cells in the adult pituitary gland might play a role as pituitary stem cells, the potential for these cells to initiate pituitary adenomas, and possible future clinical implications.

Methods: We reviewed the English literature in search for scholarly articles related to stem cells in the adult pituitary, cells with embryonic profile in the adult gland, mitogenic characteristics of adult pituitary cells, and pituitary adenoma oncogenesis.

Endoscopic endonasal transsphenoidal surgery: surgical results of 228 pituitary adenomas treated in a pituitary center.

Pituitary tumors are challenging tumors in the sellar region. Surgical approaches to the pituitary have undergone numerous refinements over the last 100 years. The introduction of the endoscope have revolutionized pituitary surgery.

Regression of intracranial meningioma following intratumoral hemorrhage.

An intratumoral hemorrhage within a meningioma occurs infrequently; in less than 3% of all lesions. When hemorrhage does occur, however, it is associated with a poor prognosis and significant mortality rates. We report a 66-year-old woman with a 10-year history of multiple intracranial meningiomas managed conservatively who underwent surgical resection of a spheno-orbital lesion for decompression of the right optic nerve.

McCune-Albright syndrome and acromegaly: hormonal control with use of cabergoline and long-acting somatostatin--case report.

Objectives: The use of drug therapy based on cabergoline, octreotide and long-acting release (LAR) octreotide has presented varying results in the treatment of GH excessive production in patients with McCune-Albright Syndrome.

Methods: We report the case of a 29 year-old female patient presenting McCune-Albright Syndrome and complaint of excessive bone growth.

Results: The patient presented a pituitary adenoma involving the right internal carotid artery and excessive secretion of growth hormone (no GH suppression was observed after the oral glucose tolerance test).

Acute kidney injury due to rhabdomyolysis-associated gangrenous myositis.

Rhabdomyolysis is associated with infectious diseases in approximately 5% of cases and acute kidney injury occurs in 33-50% of cases. Gangrenous myositis is a deep seated infection of the subcutaneous and muscular tissues. We report the case of an 18 year-old man who was admitted to the emergency room with leg pain, fever, nausea, vomiting and oliguria.