Desmoplastic small round cell tumor is a very rare malignancy. We report the case of a 26-year-old woman who suffered from dyspepsia and abdominal pain for 2 months. We performed an endoscopic biopsy of the duodenal mass and diagnosed her disease as desmoplastic small round cell tumor using immunohistochemical staining, fluorescence in situ hybridization, and reverse transcriptase polymerase chain reaction. Because the mass invaded the pancreas and superior mesenteric vein as well as duodenum and the disease was disseminated to liver and peritoneum, she received palliative chemotherapy using vincristine, doxorubicin, cyclophosphamide, ifosfamide, and etoposide. The maximal response to chemotherapy was stable disease. The patient expired 9 months after diagnosis.
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Recent research in molecular biology has identified a significant number of novel markers, which may have diagnostic, prognostic and therapeutic significance. High-throughput tissue array method facilitates the validation of novel markers by enabling the simultaneous analysis of hundreds or thousands of tissue specimens. Tissue array slides can be analyzed using techniques such as immunohistochemistry and in situ hybridization. In this review, we give a brief overview of tissue array method and its application to high throughput clinicopathologic research.
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