In the classification of cholesteatoma by site of origin, which of the following is the LEAST common type?

• A Pars flaccida (attic) cholesteatoma
• B Pars tensa (posterior) cholesteatoma
• C Primary acquired cholesteatoma
• D Congenital cholesteatoma behind intact tympanic membrane ✓

Explanation

Congenital cholesteatoma develops behind an intact tympanic membrane without prior history of otitis media, surgery, or perforation — it arises from embryonic epithelial cell rests. It is the least common type, accounting for less than 2% of all cholesteatomas. The most common type is pars flaccida (attic) cholesteatoma, followed by pars tensa posterosuperior cholesteatoma. Congenital cholesteatoma classically presents as a white mass in the anterosuperior quadrant in children.

Reference: Dhingra Diseases of Ear, Nose and Throat, 7th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.