title: Intraneural metastasis of gastric carcinoma leads to sciatic nerve palsy.
abstract: BACKGROUND
  Soft tissue metastases, in particular intraneural metastasis, from any carcinomas seldom occur. To our knowledge, no case of sciatic nerve palsy due to intraneural metastasis of gastric carcinoma is reported in the literature.
  
  
  METHODS
  A case is reported of a 82-year old woman with sciatic nerve palsy with intraneural metastasis of gastric carcinoma. Although she had undergone partial gastrectomy with T2b, N0, M0 two years ago and primary site was cured, she developed sciatic nerve palsy from the carcinoma metastasis directly to the nerve. Operative resection and Histological examination revealed poorly differentiated adenocarcinoma, the same as her primary site adenocarcinoma.
  
  
  CONCLUSIONS
  Sciatica is usually caused by a herniated disc or spinal canal stenosis. Sciatic nerve palsy may be caused by nondiscogenic etiologies that may be either intrapelvic or extrapelvic. It is important to image the entire course of the nerve to distinguish these etiologies quickly. The longer the nerve compression the less likely a palsy will recover. Surgery is a good intervention that simultaneously obtains a tissue diagnosis and decompresses the nerve.
authors: Department of Orthopaedic Surgery, Cancer Institute Hospital for Japanese Foundation for Cancer Research, Koto-ku, Tokyo, Japan.
authors: Jiro
authors: J
authors: Ichikawa
authors: Seiichi
authors: S
authors: Matsumoto
authors: Takashi
authors: T
authors: Shimoji
authors: Taisuke
authors: T
authors: Tanizawa
authors: Tabu
authors: T
authors: Gokita
authors: Keiko
authors: K
authors: Hayakawa
authors: Kaoru
authors: K
authors: Aoki
authors: Saori
authors: S
authors: Ina
authors: Hiroaki
authors: H
authors: Kanda
mesh_terms: D000230:Adenocarcinoma / Q000150:complications* / Q000556:secondary*; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D010524:Peripheral Nervous System Neoplasms / Q000150:complications* / Q000556:secondary*; D020426:Sciatic Neuropathy / Q000175:diagnosis* / Q000209:etiology*; D013274:Stomach Neoplasms / Q000473:pathology*