Embryonal Rhabdomyosarcoma of Orbit- A Case Report

Rhabdomyosarcoma is a highly malignant neoplasm of pleuripotent embryonic mesoderm, which commonly differentiates to form cells similar to rhabdomyoblasts of the foetus. Because of the presence of elongated cells that contain abundance of eosinophilic glycogen rich cytoplasm, it is generally referred to as embryonal form of rhabdomyosarcoma. Rhabdomyosarcoma is one of the most common primary malignant orbital neoplasms of child hood. It usually produces a precipitously progressing unilateral proptosis of sudden onset. We report a case of embryonal rhabdomyosarcoma of orbit presenting as large mass on medial side of right upper lid since 1 month in a 15 year old female patient.