The diagnosis in a patient with 6th nerve palsy, retro orbital pain and persistent ear discharge is –
**Core Concept**
The patient's symptoms suggest a diagnosis of Gradenigo's syndrome, a rare but serious condition characterized by a triad of lateral rectus palsy (6th nerve palsy), deep facial pain (retro-orbital pain), and otitis media with persistent ear discharge. This syndrome is caused by an extension of otitis media to the petrous apex of the temporal bone.
**Why the Correct Answer is Right**
Gradenigo's syndrome typically results from an infection of the petrous apex, which can be a complication of otitis media. The infection can cause inflammation and damage to the surrounding structures, including the abducens nerve (6th cranial nerve), leading to lateral rectus palsy. The deep facial pain is caused by the involvement of the trigeminal nerve, specifically the V1 division, which is responsible for sensation in the face. The persistent ear discharge is a result of the underlying otitis media.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify the characteristic symptoms of Gradenigo's syndrome.
* **Option B:** This option is incorrect because it does not include the key feature of 6th nerve palsy.
* **Option C:** This option is incorrect because it does not mention the deep facial pain characteristic of Gradenigo's syndrome.
* **Option D:** This option is incorrect because it does not specify the underlying otitis media.
**Clinical Pearl / High-Yield Fact**
Gradenigo's syndrome is a medical emergency that requires prompt treatment, typically involving antibiotics and surgical drainage of the abscess. Early recognition and treatment can prevent serious complications, such as meningitis or brain abscess.
**Correct Answer: C. Gradenigo's syndrome**