The Hip - book

Neurosarcoma

– See: Soft Tumor Menu – Discussion:     – also called malignant schwannoma or fibrosarcoma of nerve sheath;     – extracompartmental high grade tumor that develops from sheaths (Schwann cells) of  peripheral nerves;     – usually is a primary lesion occuring along proximal major nerve trunks,     – tumor is usually … Read more

Neurotmesis

– See: Nerve Repair: – Discussion:     – most severe nerve injury;     – complete disruption of axons, endoneurium, perineurium, & epineurium;     – Wallerian degeneration occurs;     – recovery requires operative repair and the prognosis is variable, ranging from complete recovery to no recovery;     – factors that influence … Read more

Neuroma

– See: Nerve Injury Menu: – Discussion     – occurs following nerve injury;            – schwann cells at the the site of injury express trophic factors inattempt to regenerate the nerve;            – neuroma occurs with aberant growth at the nerve injury site;       … Read more

Neurontin / Gabapentin

– Discussion:     – indicated for neuropathic pain conditions;           – diabetic neuropathy           – reflex sympathetic dystrophy;           – radicular pain           – peripheral nerve pain;     – dose ranged: 300 to 600 PO tid;   … Read more

Neuropathic Disorders

– See:        – Myopathic Disorders        – Peripheral Neuropathies        – Demyelinating Disorders – Diff Dx of Neuropathic Dz:     – Axonal Neuropathies     – Demyelo Neuropathies     – Charcot Marie Tooth     – Friedreich’s Ataxia     – Anterior Horn Dz     … Read more

Nerves arising from S3

– See: Innervation: – Discussion:     – paresthesias in buttocks are an important sign of possible cord dysfunction;     – since segments S3, S4, S5 are the lowest and most peripheral segments in the spinal cord, an extramedullary lesion           at any level may first compress these fibers and … Read more

Neurilemoma/ Schwannoma

 – Discussion:     – nerve sheath tumor which arises from schwann cells;     – commonly develop in cranial nerves (most often the 8th nerve);     – most often develops in sensory nerves;     – mass grows slowly and usually does not cause symptoms unless it grows within a confined space such as the tarsal tunnel; … Read more