Try it
Microbiology · Virology: herpes zoster ophthalmicus
Sample itemA 70-year-old man has a painful vesicular rash on the left forehead. Several vesicles are also present on the tip of the nose. Why is this finding important?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
D. It indicates nasociliary nerve involvement, which predicts ocular complications
The nasociliary branch of the ophthalmic division supplies both the tip of the nose and the cornea. Vesicles at the nasal tip (Hutchinson sign) therefore signal a markedly higher risk of keratitis, uveitis and other eye involvement. Patients need prompt systemic antiviral therapy and ophthalmological review.
Option by option
A. It indicates geniculate ganglion involvement and Ramsay Hunt syndrome
Ramsay Hunt syndrome involves the geniculate ganglion with ear vesicles and facial palsy.
B. It indicates meningitis from haematogenous spread
Zoster of a single dermatome does not imply meningitis.
C. It indicates involvement of the maxillary division and risk to the facial nerve
The lesion lies in the ophthalmic division and does not involve the maxillary division or facial nerve.
D. It indicates nasociliary nerve involvement, which predicts ocular complications (correct)
Hutchinson sign shows nasociliary involvement and predicts eye disease.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
More Microbiology questions
- BacteriologyA patient has profuse painless watery 'rice-water' stools and rapid dehydration. The cau…
- Culture mediaThayer–Martin medium is used selectively to isolate which organism?
- Immunology and serologyWhich of the following is a non-treponemal test for syphilis?
- BacteriologyAlbert's stain is used to demonstrate which of the following?