CSF otorrhoea is caused by ?
CSF otorrhea CSF otorrhea, i.e., leakage of cerebrospinal fluid through ear structure, is a rare but potentially life threatening situation that requires rapid intervention. The underlying etiology of spinal fluid leak through temporal bone is a violation of the bony and meningeal barriers that separate the subarachoid space from the middle ear and mastoid. This means that a defect must exist not only in the bone, but also in the dura matter. Causes of CSF otorrhea are : ? 1) Congenital : - Defect in otic capsule. 2) Acquired : - More common than congenital and cause are : - Surgery : - Post-operative leakage is the most common cause of CSF otorrhea. Surgical causes are acoustic neuroma removal, skull base surgeries and sometimes mastoid surgery. Trauma : - Fracture of petrous pa of temporal can lead to CSF otorrhea. Infection 3) Spontaneous : - It is without an obvious antecedent pathology. There may be some defect in the temporal bone.
Rupture of tympanic membrane
Fracture of cribriform plate
Fracture of parietal bone
Fracture of petrous temporal bone