title: Pigmented conjunctival squamous cell carcinoma simulating a conjunctival melanoma.
abstract: OBJECTIVE
  To report a pigmented conjunctival squamous cell carcinoma that clinically simulated a conjunctival melanoma.
  
  
  METHODS
  Interventional case report.
  
  
  METHODS
  Ocular examination, surgical excision, and clinicopathologic correlation.
  
  
  RESULTS
  A 78-year-old white man developed a lightly pigmented mass at the temporal limbus of his right eye. The differential diagnosis included pigmented squamous cell carcinoma and malignant melanoma. Histopathologic examination revealed a malignant squamous cell tumor that contained foci of melanin pigment. The final diagnosis was pigmented conjunctival squamous cell carcinoma.
  
  
  CONCLUSIONS
  Conjunctival squamous cell carcinoma may rarely be pigmented and simulate a conjunctival melanoma.
authors: Oncology Service, Wills Eye Hospital, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA.
authors: J A
authors: JA
authors: Shields
authors: C L
authors: CL
authors: Shields
authors: R C
authors: RC
authors: Eagle
authors: A D
authors: AD
authors: Singh
authors: H
authors: H
authors: Demirci
authors: M A
authors: MA
authors: Wolf
mesh_terms: D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000175:diagnosis* / Q000601:surgery; D003230:Conjunctival Neoplasms / Q000175:diagnosis* / Q000601:surgery; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008545:Melanoma / Q000175:diagnosis* / Q000601:surgery