Muscle invasive schistosomal squamous cell carcinoma of the urinary bladder: frequency and prognostic significance of p53, BCL-2, HER2/neu, and proliferation (MIB-1).

Muscle invasion is the usual presentation of schistosomal squamous cell carcinoma of the urinary bladder. It is unclear whether this invasive behavior is secondary to the aggressive nature of the disease or to delay in diagnosis. Fixed paraffin-embedded hematoxylin and eosin-stained sections of 15 cystectomy specimens from 15 patients (14 males, 1 female) (age range, 40 to 67 years), histologically confirmed as schistosomal squamous cell carcinoma, were assessed for grade (G1, n = 3; G2, n = 7; G3, n = 5) and pathological stage (PT category: PT2, n = 4; PT3a, n = 9; PT3b, n = 2).