Rosh Pediatrics Practice Exam

After the facial rash resolves in a child presenting with fever and respiratory symptoms, what type of rash is likely to develop?

1. Arythematous, blanching, sandpaper-like papules throughout the body

2. Oval-shaped and rose-colored or light brown patch on the trunk

3. Reticulated or lacelike eruption on the trunk and extremities

4. Vesicles and pustules on the trunk that form a thick yellow crust

The correct answer is: Reticulated or lacelike eruption on the trunk and extremities

The emergence of a reticulated or lacelike eruption on the trunk and extremities following the resolution of a facial rash in a child with fever and respiratory symptoms typically indicates a condition such as fifth disease, also known as erythema infectiosum, which is caused by parvovirus B19. Initially, children present with a "slapped cheek" rash, which is bright red and localized on the face, often accompanied by mild fever and respiratory symptoms. Once this facial rash resolves, it is common for children to develop a reticular or lacy rash on the body and extremities. This type of rash is characteristically described as having a net-like pattern, commonly seen on the arms, legs, and trunk, and arises as the infection progresses. The reticulated pattern is a distinctive feature of this viral exanthem, differentiating it from other types of rashes that may present concurrently or subsequently. In contrast, the other choices represent other types of rashes associated with different conditions, which do not align with the clinical presentation or progression typically seen after the initial facial rash associated with parvovirus B19. For instance, the sandpaper-like rash is characteristic of scarlet fever, the oval-shaped patch resembles a presentation found