Abstract
AIM: To investigate the clinicopathologic features, diagnosis, treatment and prognosis of hepatic follicular dendritic cell sarcoma.
METHODS: The clinical, pathological and immunohistochemical data for three patients with hepatic follicular dendritic cell sarcoma who were treated at our hospital were collected to analyze the clinicopathologic features, diagnosis, treatment and prognosis of the disease. A literature review was also performed to reveal the characteristics of the disease.
RESULTS: All the tumors showed an infiltrative growth pattern. Two tumors were located in the left lobe of the liver, and one in the right lobe. Histopathology revealed co-existence of the components of spindle cell sarcoma and inflammatory cells. Coagulation necrosis was noted in some areas. Immunohistochemically, tumor cells were strongly positive for CD21, CD23, CD35, vimentin, weakly positive for CD45 and EMA, but negative for CK (Pan), CD34, CD117, Dog-1, actin, SMA, caldesmon, desmin, CD10, CD15, CD30, CD1a, ALK, CD68, CD163, HMB45 and S-100. Inflammatory cells were positive for CD20, CD79a, CD2, CD3, CD45RO and CD38. In all three cases, tumor cells were positive for EBER and EBV. A diagnosis of hepatic follicular dendritic cell sarcoma was made.
CONCLUSION: Hepatic follicular dendritic cell sarcoma is a rare tumor with a high degree of malignancy and should be differentiated from interdigitating dendritic cell sarcoma, sarcomatoid hepatocellular carcinoma, inflammatory myofibroblastoma, extra-gastrointestinal stromal tumor, and histiocytosarcoma.
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