Ulkü C.H.2020-03-262020-03-2620111300-7475https://dx.doi.org/10.5606/kbbihtisas.2011.007https://hdl.handle.net/20.500.12395/27055In this study, a case with bilateral isolated stapedius tendon ossification was reported, since it is a rare clinical condition. A 46-year-old female patient was admitted to our clinic with the complaint of bilateral hearing loss. Tympanic membrane was bilateral normal in color and appearance on otomicroscopic examination. Pure tone air bone gap was between 20-25 dB at 1 kHz and 4 kHz on audiogram bilaterally. Middle ear pressure was normal and stapedius reflex was negative bilaterally. Preoperative diagnosis was otosclerosis. Right exploratory tympanotomy was performed. Isolated stapedius tendon ossification was determined. Normal stapedius movement was achieved by cutting the tendon. Three months later, the same procedure was performed on the left ear. Pure tone air bone gap was bilateral 0 dB at 0.5 kHz, 1 kHz and 2 kHz, and 5-10 dB at 4 kHz on audiogram postoperatively.tr10.5606/kbbihtisas.2011.007info:eu-repo/semantics/openAccessArticle212959721417973N/A