Extracardiac Rhabdomyoma Mimicking Plunging Ranula

Adult type of extracardiac rhabdomyoma is a benign tumour of mature striated muscle histopathologically. It is a slow growing tumour with predilection to occur in head and neck region. It appeared mainly to be a solitary lesion with 15% can occurred multicentric. A 56 year-old gentleman presented to us with floor of mouth swelling for 1 year and right neck swelling for 3 years mimicking a plunging ranula. Radiological imaging revealed enhancing mass at the floor of mouth and submandibular region. The mass represent a non vascular benign tumour. Subsequently, the patient underwent combine approached excision of the mass via transcervical and transoral method. Histopathological examination revealed adult type of extracardiac rhabomyoma. Adult type of extracardiac rhabdomyoma should be considered in the differential diagnosis in the head and neck masses. A complete excision will reduce the risk of recurrence.