Sinonasal Glomangiopericytoma: A Case Report

Sinonasal glomangiopericytoma is defined as a low-grade malignant tumor demonstrating perivascular myoid phenotype. We report case of sinonasal having diffuse architecture with bland spindle cells arranged in short fascicles, storiform, whorled, reticular pattern, separated by vascular plexus ranging from capillaries to large patulous spaces. Immunohistochemistry required differentiate it other tumours and solitary fibrous tumour. However, differentiating glomangiopericytomas based on immunohistochemistry challenge. The tumour expressed vimentin, focal smooth muscle actin CD34, diffuse, strong Bcl2 Beta catenin negative STAT6. Immunohistochemical expression STAT6 useful marker the diagnosis separation Key Messages: (SNGP), rare low potential per WHO classification frequently confused (SFT). This article emphasizes importance using broader immunohistochemical panel positive markers for SNGP SFT. most among them being SMA, BCL2, Catenin