Synovial sarcoma of the brachial plexus - a rare tumor in a rare area: a case report.

Background: Synovial cell sarcomas are usually seen in a juxta-articular location. However, they occur rarely in the head and neck region.

Case Presentation: We report a rare case of brachial plexus synovial sarcoma in a 24-year old South Asian man treated successfully with surgical excision followed by radiotherapy.

Human Evolution: The Real Cause for Birth Palsy.

Objective: Birth palsy, otherwise known as obstetric brachial plexus paralysis (OBPP), is a closed stretch injury to the brachial plexus of nerves during the birth process resulting in varying degree of paralysis and contractures of the upper limb. The study aimed to find out the susceptibility of humans and small-bodied primates to birth palsy.

Method: A comparative study on parturition in modern humans, hominoids, hominids, small-bodied primates and great apes was done to determine if the changes in female pelvis and neonatal head and shoulder during human evolution is the real cause for OBPP.