title: Primary actinomycosis mimicking urachal carcinoma.
abstract: We report a case of urachal actinomycosis that presented with a progressively enlarging infraumbilical mass associated with umbilical discharge. Computed tomography revealed an extraperitoneal mass involving the dome of the bladder. The possible diagnosis included a malignant urachal neoplasm or chronic inflammatory mass. Partial cystectomy and excision of the mass was performed. The pathologic examination revealed actinomycosis. The patient was treated with a 6-month course of antibiotics. No recurrence was noted 1 year postoperatively.
authors.affiliation: Department of Division of Urology, University of Hong Kong Medical Center, Queen Mary Hospital, Hong Kong, People's Republic of China.
authors.forename: Y
authors.initials: Y
authors.lastname: Yeung
authors.forename: M C
authors.initials: MC
authors.lastname: Cheung
authors.forename: G S
authors.initials: GS
authors.lastname: Chan
authors.forename: A N
authors.initials: AN
authors.lastname: Cheung
authors.forename: P C
authors.initials: PC
authors.lastname: Tam
mesh_terms: D000196:Actinomycosis / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D000368:Aged; D015653:Cystectomy / Q000379:methods; D005260:Female; D006801:Humans; D008637:Mesenchymoma / Q000175:diagnosis* / Q000473:pathology; D014496:Urachal Cyst / Q000175:diagnosis / Q000473:pathology; D014497:Urachus / Q000473:pathology* / Q000601:surgery