Biphasic Synovial Sarcoma of the Cheek in a Child: A Rare Case in an Unusual Location Synovial sarcoma (SS) is rare in the head and neck region, accounting for only 10% of all SS, and less than 0.1% of all head and neck malignancies. Head and neck SS in paediatrics is extremely rare, with only a few cases reported worldwide. Here, we report a case of right cheek SS in a child who presented to us with a 5-month history of painless right cheek swelling. On examination, there was a palpable right cheek mass measuring 4 cm × 4 cm in size, firm in consistency, with a smooth surface and a well-defined margin. Examination of the ear, nose, throat, and head and neck was normal. Imaging showed a well defined enhancing lesion with calcifications, with no involvement of the paranasal sinuses, intraorbital, and intracranial extension. Fine needle aspiration for cytology showed a spindle cell lesion. Excision of the right cheek tumour was done via a sublabial approach. stopathological diagnosis of biphasic synovial sarcoma was made. Post-operatively, the patient was referred to an oncologist for adjuvant chemoradiotherapy. The patient recovered well, and no recurrence was found during the follow-up at six months.