title: Ureterosigmoidostomy associated signet ring colon cancer presenting as hip pain.
abstract: OBJECTIVE
  We present a case of a young male with a history of ureterosigmoidostomy who presented with hip pain, the subsequent workup of which revealed metastatic bone lesions from a primary sigmoid signet ring cell adenocarcinoma.
  
  
  METHODS
  Review of literature was conducted using databases PubMed Medline (1966-current), PubMed Central (1970-current), and EMBASE (1988-2009) to explore previous studies on the topic; used the Surveillance, Epidemiology and End Results Program for epidemiological data; and used the National Comprehensive Cancer Network guidelines for management recommendations.
  
  
  RESULTS
  Ureterosigmoidostomy is well-documented risk factor for colonic neoplasms, the reported incidence being 2-41% with a latent period of 10 to 30 years and a risk of occurrence 80-7,000 times higher than in the general population. The most common histological type of colon cancer seen after ureterosigmoidostomy is adenocarcinoma, but cases of signet-ring cell carcinoma have also been described. Signet-ring cell adenocarcinoma occurs predominantly in stomach but may infrequently arise from other organs such as breast, urinary bladder, and small and large bowel.
  
  
  CONCLUSIONS
  This case underscores the importance of prolonged screening in patients with ureterosigmoidostomies and also calls for heightened awareness among primary care physicians regarding long-term risks associated with this unique entity.
authors.affiliation: Department of General Internal Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA, USA. rohtesh@yahoo.com
authors.forename: Rohtesh S
authors.initials: RS
authors.lastname: Mehta
authors.forename: Peter
authors.initials: P
authors.lastname: Ennis
authors.forename: Joseph
authors.initials: J
authors.lastname: Whitten
mesh_terms: D000328:Adult; D018279:Carcinoma, Signet Ring Cell / Q000209:etiology*; D012809:Colon, Sigmoid / Q000601:surgery*; D003110:Colonic Neoplasms / Q000209:etiology*; D006615:Hip; D006801:Humans; D008297:Male; D010146:Pain / Q000209:etiology*; D011183:Postoperative Complications / Q000209:etiology*; D014513:Ureter / Q000601:surgery*; D001743:Urinary Bladder / Q000002:abnormalities*