Intramuscular Sinusoidal Hemangioma with Masson’s Lesion, Masquerading as Parotid Tumor

Introduction Sinusoidal hemangioma is a rare variant of cavernous hemangioma, described first by Calonje and Fletcher, more frequently subcutaneous and commonly found on the extremities. Fine needle aspiration cytology report was indeterminate. In such cases preoperative diagnosis is difficult. Slowly growing mass is the usual presenting complaint. Case Report A rare case of intramuscular sinusoidal hemangioma, with typical Masson’s lesion masquerading as a parotid tumor, in middle aged woman. Discussion Hemangiomas comprise 7% of all benign tumors and they are benign proliferative vascular tumors characterized by increased endothelial cell turn over. They are usually superficial and easy to diagnose whereas intramuscular hemangiomas (IMH) are uncommon and deep seated and difficult to diagnose. Fifteen percent of the IMHs are found in the head and neck area and the most common muscle affected is the masseter.