Study for the Medical Council of Canada Qualifying Examination (MCCQE) I. Engage with flashcards and multiple-choice questions with detailed feedback. Prepare confidently!

Multiple Choice

Erythema infectiosum (fifth disease) is classically described as causing which facial rash?

The main idea is recognizing the classic facial presentation of erythema infectiosum: a bright red, clearly accentuated cheek rash that looks as if the cheeks were slapped. This “slapped cheek” appearance is produced by parvovirus B19 infection and is the hallmark facial feature of this illness, often followed by a lacy, reticular rash on the trunk and limbs a bit later. The other descriptions point to different diseases or patterns and don’t describe the characteristic slapped-cheek facial eruption. For example, a vesicular rash on the hands and feet is typical of hand-foot-and-mouth disease, not erythema infectiosum; a confluent trunk rash is not the defining facial sign of this infection; and a rash on the palms and soles can occur with other conditions and isn’t the classic facial description here. So the slapped-cheek appearance is the best answer because it uniquely identifies the facial manifestation of erythema infectiosum.

The main idea is recognizing the classic facial presentation of erythema infectiosum: a bright red, clearly accentuated cheek rash that looks as if the cheeks were slapped. This “slapped cheek” appearance is produced by parvovirus B19 infection and is the hallmark facial feature of this illness, often followed by a lacy, reticular rash on the trunk and limbs a bit later. The other descriptions point to different diseases or patterns and don’t describe the characteristic slapped-cheek facial eruption. For example, a vesicular rash on the hands and feet is typical of hand-foot-and-mouth disease, not erythema infectiosum; a confluent trunk rash is not the defining facial sign of this infection; and a rash on the palms and soles can occur with other conditions and isn’t the classic facial description here. So the slapped-cheek appearance is the best answer because it uniquely identifies the facial manifestation of erythema infectiosum.