In Roseola infantum, which finding is considered pathognomonic?

In Roseola infantum, which finding is considered pathognomonic?

• A. Occipital lymphadenopathy
• B. Koplik spots
• C. Petechial rash
• D. Conjunctival injection

Answer: (A)

Occipital lymphadenopathy is a classic finding that strongly supports Roseola infantum. This illness typically starts with a high fever for several days, followed by a sudden fever drop and the appearance of a maculopapular rash that often begins on the trunk. The presence of tender lymph nodes in the occipital region accompanies this pattern and helps distinguish Roseola from other febrile exanthems. By contrast, Koplik spots are associated with measles, petechial rash points to other causes such as meningococcemia, and conjunctival injection is a non-specific sign seen in many viral illnesses. Thus, occipital lymphadenopathy is viewed as a pathognomonic finding for Roseola in this clinical context.

Occipital lymphadenopathy is a classic finding that strongly supports Roseola infantum. This illness typically starts with a high fever for several days, followed by a sudden fever drop and the appearance of a maculopapular rash that often begins on the trunk. The presence of tender lymph nodes in the occipital region accompanies this pattern and helps distinguish Roseola from other febrile exanthems. By contrast, Koplik spots are associated with measles, petechial rash points to other causes such as meningococcemia, and conjunctival injection is a non-specific sign seen in many viral illnesses. Thus, occipital lymphadenopathy is viewed as a pathognomonic finding for Roseola in this clinical context.