Koplik spots are pathognomonic for which childhood disease?

Koplik spots are pathognomonic for which childhood disease?

• A. Rubella
• B. Varicella
• C. Measles
• D. Hand-Foot-Mouth disease

Answer: (C)

Koplik spots are small bluish-white lesions with a red halo on the inner cheek that appear early in measles. Their presence is highly characteristic and essentially specific to measles, so they’re considered pathognomonic for this disease. These spots typically show up about 1–2 days before the telltale maculopapular rash, helping to distinguish measles from other childhood illnesses that cause fever and rash. Why the others don’t fit: rubella does not produce Koplik spots, and while varicella involves vesicular skin lesions, Koplik spots aren’t part of its presentation; hand-foot-mouth disease features oral ulcers and a distinctive hand-and-foot rash rather than Koplik spots.

Koplik spots are small bluish-white lesions with a red halo on the inner cheek that appear early in measles. Their presence is highly characteristic and essentially specific to measles, so they’re considered pathognomonic for this disease. These spots typically show up about 1–2 days before the telltale maculopapular rash, helping to distinguish measles from other childhood illnesses that cause fever and rash.

Why the others don’t fit: rubella does not produce Koplik spots, and while varicella involves vesicular skin lesions, Koplik spots aren’t part of its presentation; hand-foot-mouth disease features oral ulcers and a distinctive hand-and-foot rash rather than Koplik spots.