# A 15-year-old adolescent is admitted to the pediatric oncology unit with suspected osteosarcoma of the right femur. Which assessment finding would be most characteristic of this condition? > source: MyMerci (mymerci.kr) > url: https://mymerci.kr/pages/nclex_q.php?qn_id=542217 > language: ko > subject: Child Health ## 문제 A 15-year-old adolescent is admitted to the pediatric oncology unit with suspected osteosarcoma of the right femur. Which assessment finding would be most characteristic of this condition? The nurse is conducting an initial assessment of a teenager with suspected bone cancer. ## 보기 1. Persistent bone pain that is worse with activity and improves with rest 2. Progressive bone pain that worsens at night and is unrelieved by rest **✔ 정답** 3. Sudden onset of severe pain after a minor fall or injury 4. Dull aching pain that is constant throughout the day and night **정답: 2** ## 해설 Progressive bone pain that worsens at night and is unrelieved by rest is the most characteristic symptom of osteosarcoma, occurring in approximately 90% of patients. Osteosarcoma is the most common primary bone tumor in children and adolescents, occurring mainly during periods of rapid bone growth. The most characteristic symptom of osteosarcoma is progressive deep bone pain that worsens at night and is not relieved by rest. This pain pattern occurs in about 90% of patients and arises because the tumor grows rapidly within the confined space of the bone cortex, creating pressure and inflammation. Pathophysiologically, malignant osteoblasts produce abnormal bone tissue and osteoid tissue, leading to simultaneous bone destruction and new bone formation. This process creates significant pressure within the bone, causing the characteristic deep, aching pain. Pain typically precedes other symptoms by weeks to months, making it the earliest reliable indicator for evaluation. Nighttime pain is especially important because it suggests serious pathology rather than the growing pains or sports injuries that adolescents commonly experience. Growing pains usually occur in the evening but are relieved by rest, whereas osteosarcoma pain intensifies during rest periods. Progressive means the pain gradually worsens over time, rather than remaining stable or improving. Early recognition of this pain pattern is critical for prompt diagnosis and treatment. Osteosarcoma tends to metastasize early, particularly to the lungs, so early detection greatly affects prognosis. When diagnosed before metastasis, the 5-year survival rate is approximately 70-75%, but survival decreases significantly if metastatic disease is present at diagnosis. ## 심화 해설 Correct Answer: 2. Progressive bone pain that worsens at night and is unrelieved by rest Explanation of the Correct Answer Osteosarcoma is the most common primary malignant bone tumor in adolescents and young adults . The clinical presentation is heavily influenced by the tumor's aggressive biological behavior, including rapid proliferation and invasion of the bone matrix and periosteum. This pathophysiology directly explains the characteristic pain pattern. The pain associated with osteosarcoma is typically described as progressive and unrelenting. A hallmark feature is nocturnal pain that disrupts sleep and is not relieved by rest . This occurs because the tumor mass continues to expand within the rigid bone cavity, causing increased intramedullary pressure and periosteal stretching regardless of activity or position. Unlike mechanical or inflammatory pain, the nociceptive stimulus from tumor growth is constant and often intensifies when the body is at rest and external distractions are minimal, making the pain more noticeable at night. Why Other Options Are Incorrect - Option 1: Pain that worsens with activity and improves with rest is a classic pattern for mechanical or overuse injuries, such as a stress fracture, tendinitis, or growing pains. While a pathological fracture from an osteosarcoma can cause acute pain with activity, the hallmark initial symptom is a deep, progressive pain independent of mechanical loading. - Option 3: Sudden onset of severe pain after a minor fall suggests an acute traumatic injury, such as a fracture or ligamentous tear. In the context of a bone tumor, this could indicate a pathological fracture. However, a pathological fracture is a complication of the disease, not the most characteristic initial assessment finding. The underlying pain is typically present for weeks or months before a fracture occurs. - Option 4: A dull, aching pain that is constant throughout the day and night is a more generic description that could apply to many chronic conditions, including benign tumors or chronic osteomyelitis. The key differentiator for osteosarcoma is the progressive nature and the specific worsening at night, which reflects the tumor's relentless growth and is a critical red flag in the pediatric and adolescent population . Clinical Reasoning and NCLEX Application For NCLEX-RN examinees, recognizing the pain pattern of malignant bone tumors is a high-yield concept in pediatric and oncological nursing. When a teenager presents with localized bone pain, the nurse's assessment must differentiate between benign and malignant etiologies. Upper extremity pain in children and adolescents, for instance, should always be investigated thoroughly, as "growing pains" are not a typical finding in the arms . The presence of progressive, nocturnal pain unrelieved by rest should immediately raise suspicion for a malignant process like osteosarcoma and prompt further diagnostic evaluation, such as an X-ray and MRI. This assessment finding is a critical cue for prioritizing care and ensuring timely referral, as delays in diagnosis can significantly impact prognosis . ## 임상 시나리오 Osteosarcoma Pain Assessment in AdolescentsKey Clinical Clues for Early Recognition The classic pain pattern for osteosarcoma is progressive, nocturnal, and unrelieved by rest. This occurs because the tumor's constant expansion increases intramedullary pressure and stretches the periosteum, creating a continuous nociceptive stimulus. Differentiate this from mechanical pain, which typically worsens with activity and improves with rest. A history of pain that disrupts sleep in an adolescent should raise immediate suspicion for a malignant bone process. CautionDo not dismiss persistent bone pain as "growing pains" or a sports injury. A sudden increase in pain may signal a pathological fracture, which can occur even with minimal trauma due to bone destruction. ## 핵심 개념 - **Osteosarcoma** — The most common primary malignant bone tumor in adolescents, characterized by aggressive proliferation and invasion of bone matrix. - **Nocturnal Pain** — Pain that worsens at night, a hallmark of malignant bone tumors due to constant tumor expansion and increased intramedullary pressure regardless of activity. - **Periosteal Stretching** — Irritation and stretching of the periosteum caused by an expanding tumor mass, generating a constant nociceptive stimulus. - **Pathological Fracture** — A fracture occurring through a bone weakened by a disease process such as a tumor, often presenting with sudden, severe pain after minimal trauma. ## 같은 주제 문제 - [A 15-year-old adolescent is admitted to the pediatric oncology unit with a suspected diagn…](https://mymerci.kr/pages/nclex_q.php?qn_id=542215) - [A 16-year-old adolescent is admitted to the pediatric oncology unit with a suspected diagn…](https://mymerci.kr/pages/nclex_q.php?qn_id=542216) - [A 16-year-old adolescent is admitted to the pediatric oncology unit with a suspected diagn…](https://mymerci.kr/pages/nclex_q.php?qn_id=542218) - [A 17-year-old client with osteosarcoma of the left humerus is scheduled for limb-salvage s…](https://mymerci.kr/pages/nclex_q.php?qn_id=542219) - [A 16-year-old client with osteosarcoma of the right femur is scheduled for limb-salvage su…](https://mymerci.kr/pages/nclex_q.php?qn_id=542220) - [A 16-year-old client with osteosarcoma of the left femur is scheduled for limb-salvage sur…](https://mymerci.kr/pages/nclex_q.php?qn_id=542221) - [A 15-year-old client with osteosarcoma of the left tibia is scheduled for limb-salvage sur…](https://mymerci.kr/pages/nclex_q.php?qn_id=542222) --- More free questions: [기출문제](https://mymerci.kr/) _학습 참고용입니다. 실제 임상은 최신 지침과 소속 기관 프로토콜을 따르세요._