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Alpha-fetoprotein-producing urachal adenocarcinoma
N Lertprasertsuke1, Y Tsutsumi
1Department of Pathology, Tokai University School of Medicine, Isehara, Japan.
Acta Pathologica Japonica
|April 1, 1991
Summary
This case report details a rare urachal adenocarcinoma in a Japanese male, characterized by elevated alpha-fetoprotein (AFP) and carcinoembryonic antigen (CEA) levels. The tumor metastasized widely, leading to the patient's death despite palliative treatment.
Area of Science:
- Uro-oncology
- Surgical pathology
- Medical oncology
Background:
- Urachal adenocarcinoma is a rare malignancy arising from remnants of the embryonic allantois.
- Clinical presentation often includes hematuria, abdominal pain, or a palpable mass.
- Metastatic spread can occur to lungs, liver, peritoneum, and lymph nodes.
Observation:
- A 45-year-old male presented with macroscopic hematuria and lung metastases.
- Imaging revealed a urachal tumor extending from the bladder dome to the navel.
- Elevated serum alpha-fetoprotein (AFP) and carcinoembryonic antigen (CEA) were noted.
Findings:
- Histopathology confirmed adenocarcinoma with medullary, papillotubular, and solid (hepatoid) components.
- Tumor cells showed glycogen positivity and immunoreactivity for AFP, CEA, and other markers.
- The case is the first reported instance of AFP-producing urachal adenocarcinoma.
Implications:
- This case highlights the importance of considering urachal origin in bladder tumors with elevated AFP.
- The unique tumor biology may necessitate tailored treatment strategies.
- Further research into the pathogenesis and optimal management of such rare tumors is warranted.