RESUMEN
Dermoid and epidermoid cysts are ectoderm lined cysts with 7% occurring in the head and neck region 3,4 , most often in the submental region. A case of a 24 year old patient with submental swelling , diagnosed as a thyroglossal duct cyst on clinical examination , radiologically and cytology appearing like a dermoid cyst. Excision biopsy was done , showing it to be an epidermoid cyst. Differential diagnosis of these midline swellings is necessary , as there are significant variations on clinical , cytological and radiological assessment , biopsy being the final and confirmatory method of assessment.Therefore, it is considered superior for a confirmatory diagnosis of midline neck swellings.
RESUMEN
In general Swelling over sublingual regions will be provisionally diagnosed as Dermoid cyst / Ranula / Mucous retention cyst / Salivary gland tumours. But in rarest of rare cases, there may be chances of a Hydatid cyst. Hydatid disease or Echinococcosis is a zoonotic disease caused by Echinococcus granulosus as seen in this 29years old female with swelling over the sublingual region extending into the neck. Clinically appeared as dermoid cyst and radiological investigations suggestive of the possibility of ranula, so planned for surgery but surprisingly on table after opening the swelling there was a tough ?brous layer with underneath thick whitish lamellated membrane, anticipated as hydatid cyst which was also con?rmed by the histopathological report.