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  • Title: Retroperitoneal solitary fibrous tumor of the pelvis with pollakiuria: a case report.
    Author: Tsushimi T, Yagi T, Tomozawa N, Ohnishi H.
    Journal: BMC Res Notes; 2012 Oct 29; 5():593. PubMed ID: 23107063.
    Abstract:
    BACKGROUND: Solitary fibrous tumor (SFT) is rare soft tissue tumor, and it occurs most commonly in the pleura. Retroperitoneal SFT is generally found by palpable mass or abdominal distention. Here we report a case of SFT presenting pollakiuria. CASE PRESENTATION: A 64-year-old man was referred to our hospital for pollakiuria. Contrasted-enhanced computed tomography revealed a heterogeneously enhanced pelvic tumor of approximately 10 × 8 × 7 cm. Invasion of the surrounding organs, distal metastasis, and lymph node swelling were absent. Therefore, surgical resection was performed. The resected specimen was a 13 × 8 × 5.5-cm encapsulated elastic hard tumor weighing 420 g. Histologically, the tumor consisted of oval or spindle cells growing in a random manner in a collagenous matrix. Immunohistochemically, the specimen was positive for CD34, bcl-2, as well as vimentin and negative for c-kit. On the basis of these findings, a retroperitoneal solitary fibrous tumor (SFT) of the pelvis was diagnosed. CONCLUSION: Surgery is the primary treatment for SFT, and pathologically negative margins are important for good prognosis.
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