Ectopic hamartomatous thymoma growing in the sternocleidomastoid muscle masquerading as sarcoma

Abstract

The distinction between ectopic hamartomatous thymoma and sarcoma is difficult, and preoperative biopsy and intraoperative histopathological examination fail to give a definitive diagnosis. It is important to recognise ectopic hamartomatous thymoma as one of the differential diagnoses of a cervical tumour.

• Ectopic hamartomatous thymoma
• sternocleidomastoid muscle
• different diagnosis
• liposarcoma