A patient presents with hyperacusis, loss of lacrimation and loss of taste sensation in the anterior 2/3rd of the tongue. Oedema extends up to which level of facial nerve -: (A) Vertical part, (B) Vertical part proximal to nerve to stapedius, (C) Vertical part and beyond nerve to stapedius, (D) Proximal to geniculate ganglion
Answer is D. The patient is presenting with : -


Hyperacusis: - Nerve to stapedius is involved.
Loss of taste sensation in anterior 2/3 of tongue → Chorda tympani is involved.
Loss of lacrimation → Greater superficial petrosal nerve is involved.


Thus, the lesion is at or proximal to geniculate ganglion.