Mucinous adenocarcinoma of the urinary bladder.

BACKGROUND: Mucinous adenocarcinoma of the urinary bladder is a rare primary urologic disease, poorly responsive to radiation or chemotherapy as first-line treatment. CASE REPORT: After trans-urethral resection of the bladder, a 62-year-old woman was diagnosed with mucinous adenocarcinoma of the urinary bladder. An upper gastro-intestinal endoscopy and a colonoscopy excluded any primary site of origin from those gastro-intestinal tracts. After whole-body CT staging scans, an anterior pelvectomy was performed, confirming a mucinous adenocarcinoma of the bladder, with no extra-vesical spreading. Some onco markers were sampled before surgery, and Ca 19-9 showed very high values, with a decreasing trend after pelvectomy. Six month after surgery, bilateral inguinal lymph node dissection was performed because of bilateral palpable masses - histologic examination showed a single metastatic node. The patient also received external radiotherapy of the inguinal area. Twenty-eight months after pelvectomy, the patient appears healthy. CONCLUSIONS: Early radical surgery with or without adjuvant radio-chemo-therapy appears to be the best option for mucinous adenocarcinoma of the bladder, and a good outcome is likely to be related with a confined disease and small tumor size. In addition, Ca 19-9 sampling proves to be useful in tumors that produce markers.

Multifocal epithelioid angiosarcoma of bone: a potential pitfall in the differential diagnosis with metastatic carcinoma.

A case of multifocal epithelioid angiosarcoma of the femur, tibia, fibula, and astragalus in a 54-year-old man is reported. The tumor was composed of nests and cords of malignant cells with epithelioid morphology, with foci of vascular differentiation, necrosis, and hemorrhage. By immunohistochemistry, the neoplastic cells showed positivity for endothelial cell markers (CD31, CD34, factor VIII-related antigen, and Ulex europaeus agglutinin I), epithelial markers (cytokeratins and epithelial membrane antigen), and vimentin. The authors' findings point out the need for a panel of antibodies for the careful search of histologic features of vascular differentiation to correctly diagnose vascular bone tumors with epithelioid features, especially in evaluating small core biopsy specimens in which a sheetlike rather than obviously vasoformative architecture may lead to an erroneous diagnosis of metastatic carcinoma.