title: Nematode infection of the liver mimicking metastasis of malignant melanoma.
abstract: BACKGROUND
  The differential diagnoses of a circumscribed mass of the liver are varied. Especially if a malignant tumor, capable of setting metastases to the liver, is known in a patient's medical history, there might be difficulties in differentiating the tumor's entity. CASUISTRY: We report a case of a 40-year-old male with a history of malignant melanoma in whom follow-up investigations revealed a mass in the liver.
  
  
  RESULTS
  The histopathological and microbiological results, however, showed an infestation of liver tissue with nematodes. Malignant tumor cells could not be detected.
  
  
  CONCLUSIONS
  Roundworm-infections of the liver can present as lesions suspicious of being malignant. Therefore, along with e.g. microhamartoma, microabscesses and hepatocellular carcinoma, infestation with nematodes should be taken into consideration.
authors.affiliation: Department of Surgery, University of Würzburg, Würzburg, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Maier
authors.forename: D
authors.initials: D
authors.lastname: Tappe
authors.forename: C
authors.initials: C
authors.lastname: Töpfer
authors.forename: A
authors.initials: A
authors.lastname: Rosenwald
authors.forename: H-J
authors.initials: HJ
authors.lastname: Gassel
authors.forename: S
authors.initials: S
authors.lastname: Timm
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D008109:Liver Diseases, Parasitic / Q000175:diagnosis* / Q000469:parasitology / Q000473:pathology; D008113:Liver Neoplasms / Q000175:diagnosis*; D008297:Male; D008545:Melanoma / Q000175:diagnosis* / Q000556:secondary*; D009349:Nematode Infections / Q000175:diagnosis* / Q000469:parasitology / Q000473:pathology