Keratinous Cyst of External Auditory Canal Masquerading as Parotid Lesion: A Clinical Dilemma
- 1. Department of ENT, Ramachandra Institiute of Higher Education and Research, India
Cystic swelling of parotid is a rare clinical condition. Incidence is only 5%. Differential diagnosis of cyst in parotid are Dermoid cyst, first Branchial arch cyst, Malignancy, calculi and epidermal cyst. Keratinous cyst is a type of epidermal cyst and it is also called as Epidermoid cyst/ Epidermal Inclusion cyst. It can occur after trauma or surgery due to implantation of epithelium. Patient presents with painless soft swelling with gradual progression in size. FNAC and MRI scan are invaluable tools for diagnosis of such cysts. In this case, a 52 year old male with soft swelling in right parotid region was diagnosed of keratinous cyst. Patient underwent Enucleation of the cyst and the cyst was found to be attached to the external auditory canal. Histopathology confirmed the diagnosis. Keratinous cyst in parotid region with attachment to the
external auditory canal is rarely reported in literature. This study discusses the clinical presentation, diagnosis and the surgical treatment of the keratinous cyst in parotid.