# A nurse is assessing a 15-month-old child who has been brought to the pediatric clinic. Which assessment finding would be most characteristic of roseola (exanthema subitum)? > source: MyMerci (mymerci.kr) > url: https://mymerci.kr/pages/nclex_q.php?qn_id=542247 > language: ko > subject: Child Health ## 문제 A nurse is assessing a 15-month-old child who has been brought to the pediatric clinic. Which assessment finding would be most characteristic of roseola (exanthema subitum)? ## 보기 1. High fever for 3-4 days followed by a rose-pink rash appearing as the fever subsides **✔ 정답** 2. Low-grade fever with a red, sandpaper-like rash beginning on the face 3. Koplik's spots in the mouth followed by a blotchy red rash starting on the face 4. Vesicular rash in various stages of development with intense itching **정답: 1** ## 해설 Roseola is characterized by high fever for 3-4 days followed by a rose-pink rash appearing as fever subsides. Other options describe measles (Koplik's spots), scarlet fever (sandpaper-like rash), or chickenpox (vesicular rash). ## 심화 해설 Understanding the Clinical Presentation of Roseola (Exanthema Subitum) The most characteristic finding of roseola, also known as exanthema subitum or sixth disease, is the pattern of a high fever that suddenly resolves, immediately followed by the appearance of a rash. This classic sequence is so distinctive that it is often the key to clinical diagnosis. Why This Answer is Correct Option 1 describes the hallmark progression of roseola. The illness typically begins with an abrupt onset of high fever, often spiking to 39-40°C (102.2-104°F), which persists for 3 to 4 days in an otherwise well-appearing child. The defining moment occurs as the fever defervesces, or breaks, and a rose-pink, maculopapular rash emerges. As noted in the case report by Pippin and Laws, this "defervescence rash" is centrally located on the trunk and then spreads peripherally to the neck and extremities [1]. The rash is typically non-pruritic and fades within a few hours to two days. This temporal relationship—fever resolution coinciding with rash onset—is the most critical assessment finding for identifying roseola. Analysis of Incorrect Options * Option 2: A low-grade fever with a red, sandpaper-like rash that begins on the face is characteristic of scarlet fever, caused by group A Streptococcus. The rash of scarlet fever has a rough texture, unlike the smooth maculopapular rash of roseola, and it often appears while the fever is still present, not after it subsides. * Option 3: The presence of Koplik's spots—small, white lesions on the buccal mucosa—followed by a blotchy red rash starting on the face is the classic presentation of rubeola (measles). This prodromal enanthem is pathognomonic for measles and is not seen in roseola. * Option 4: A vesicular rash in various stages of development (papules, vesicles, and crusts) with intense itching is the hallmark of varicella (chickenpox). Roseola’s rash is maculopapular, not vesicular, and pruritus is not a prominent feature. Pathophysiology and Clinical Implications Roseola is caused by human herpesvirus 6 (HHV-6), and less frequently HHV-7 [2,4]. The virus establishes a latent infection after the primary illness. The pathogenesis involves viremia during the febrile phase, and the subsequent rash is thought to be an immunologically mediated response to the virus as the body mounts its defense, which explains why the rash appears as the fever resolves. A critical piece of anticipatory guidance for parents and a key nursing assessment point relates to the fever phase. The rapid rise in temperature can provoke febrile seizures, which are the most common complication of roseola. A large prospective cohort study from Japan found a significant association between the timing of the first episode of exanthema subitum and the occurrence of febrile seizures, underscoring the importance of parental education on fever management and seizure precautions during the initial febrile illness . While the disease is typically benign and self-limiting in immunocompetent children, the case report by Habanjar et al. illustrates that rare neurological complications, including encephalitis with neuropsychiatric symptoms like catatonia, can occur even in immunocompetent children . Furthermore, while roseola is overwhelmingly a disease of childhood, the case by Caetano et al. serves as a reminder that HHV-6 reactivation can, in uncommon instances, cause severe disseminated disease in immunocompetent adults, presenting with fever, confusion, and a truncal maculopapular rash .References (research sources) - [1]A Classic Presentation of Roseola Infantum.Research articlePippin M, Laws G. (2024) · DOI: 10.7759/cureus.52504 ## 임상 시나리오 Roseola Clinical GuideRecognizing the Fever-Rash Sequence The hallmark of roseola is a high fever (39–40°C) lasting 3–4 days in an otherwise well-appearing child. The rose-pink, maculopapular rash appears suddenly as the fever subsides (defervescence rash), starting on the trunk and spreading to the neck and extremities. CautionDo not confuse with measles, which presents with Koplik's spots and a rash that begins on the face while fever is still present. The rash of roseola is non-pruritic and fades within 1–2 days. ## 핵심 개념 - **Roseola (Exanthema Subitum)** — A common viral illness in infants caused by HHV-6/7, marked by high fever followed by a rash as fever subsides. - **Defervescence Rash** — A rash that appears suddenly once a fever breaks, which is the clinical hallmark of roseola. - **Koplik's Spots** — Small, white spots on the buccal mucosa that are an early sign of measles (rubeola). - **Scarlet Fever Rash** — A diffuse, erythematous, sandpaper-like rash caused by group A Streptococcus, often with fever. - **Varicella Rash** — A pruritic, vesicular rash appearing in crops, with lesions in various stages of development. ## 같은 주제 문제 - [A 15-month-old child is brought to the pediatric clinic with a 3-day history of high fever…](https://mymerci.kr/pages/nclex_q.php?qn_id=542246) --- More free questions: [기출문제](https://mymerci.kr/) _학습 참고용입니다. 실제 임상은 최신 지침과 소속 기관 프로토콜을 따르세요._