Carcinosarcoma is an exceedingly rare biphasic tumor affecting upper aerodigestive tract, reveals both carcinomatous and sarcomatous elements dominating later one. In head and neck most common site of involvement is larynx (vocal cord) and hypopharynx with a very rare occurrence in oral cavity. It has male predilection with alcohol abuse, cigarette smoking, poor oral hygiene and previous radiotherapy as predisposing factors. Aggressive behaviour, high recurrence rate and metastasis of tumor makes diagnosis critical. Owing to its rarity, histological and immunohistochemical features simulates with other benign and malignant spindle cell lesions, poses diagnostic challenge. Here we are presenting a rare case of 32 years old female, who was diagnosed histologically with Glomus tumor on incisional biopsy and myoepithelioma on resection but recurrence occurred within 60 days posing a malignancy with a final diagnosis of carcinosarcoma confirmed by immunohistochemistry.