RENAL HEMANGIOPERICYTOMA: A POSSIBLE CAUSE OF ACUTE ABDOMEN

Abstract

Introduction: Hemangiopericytoma (HPC) is a type of mesenchymal fibroblast tumor with anomalous perivascular presentation and malignant potential. We report a case of renal HPC presented with acute abdomen.

Case presentation: A 59-year-old male patient presented fever and refractory abdominal pain in the right hypochondrium region. The abdominal computed tomography (CT) showed solid mass in the anteroinferior region of the right kidney, with slightly lobulated contour, heterogeneous enhancement after contrast, with hypodense areas compatible with necrosis, measuring 14.2 x 12.6 x 10 cm, compressing and displacing the inferior vena cava and ascending colon. The patient underwent right laparoscopic radical nephrectomy, without complication. The anatomopathological study showed mesenchymal neoplasia with moderate mitotic index, with foci of necrosis and moderate cellular pleomorphism. The immunohistochemical study confirming the diagnosis of HPC.

Conclusion: Renal HPC is an extremely rare neoplasm. Clinical manifestations are variable, being a possible cause of acute abdomen.

Key words: renal cancer, hemangiopericytoma, acute abdomen