Cerebrospinal fluid otorrhoea from an abnormal communication between the internal auditory meatus and the medial wall of the tympanic cavity.

Patients who have had middle-ear or mastoid surgery are at an increased risk of developing cerebrospinal fluid (CSF) otorrhoea. The CSF leak is usually from defects in the tegmen or posterior cranial fossa. We present a patient with CSF otorrhoea following a modified radical mastoidectomy seven years ago. There was an unusual communication between the internal auditory meatus (IAM) and the middle ear. Radiologic imaging like the MRI is useful in identifying the site of leak.