Surgical variation of microvascular decompression for trigeminal neuralgia: A technical note and anatomical study.

Background: In this article, the authors described their experience in microvascular decompression for trigeminal neuralgia.

Methods: The microvascular decompression technique used in the authors' institution is described in a step by step manner with some illustrative cases as well as a cadaver dissection to highlight the differences with other previously described techniques.

Results: Since 2013, 107 patients were operated in the Neurosurgery Division of the University of São Paulo using the described technique, with a shorter operative time and avoiding cerebellar retractor compared with classic techniques.

Vitamin B12 deficiency in infancy as a cause of developmental regression.

Vitamin B12 deficiency can cause serious developmental regression, hypotonia and cerebral atrophy in infants. We report a 6-month-old infant, with insidious developmental regression and brain atrophy showed by CT scan, secondarily to vitamin B12 deficiency. His mother was a strict vegetarian and the patient was exclusively breastfed.