Neuroblastoma

Neuroblastoma begins in neuroblasts, which are immature nerve cells that normally mature into sympathetic nervous system cells. When these cells grow abnormally, they can form a tumour. Common tumour locations include: Location Possible Symptoms Abdomen/adrenal gland Abdominal mass, swelling, pain, constipation, poor appetite Chest Cough, shortness of breath, difficulty swallowing Neck Visible lump, Horner syndrome signs Spine/paraspinal area Weakness, changes in gait, bowel/bladder changes Bone/bone marrow spread Bone pain, limp, fatigue, pallor, bruising For REx-PN (Canada), items rarely announce the topic in the first sentence. Anchor to objective data, trajectory, and the safest next step for the role named in the stem before distractors compete. On the exam, writers often pair stable-sounding options with unstable data—notice the mismatch before you commit. If the stem names a license or role, reread that line; scope errors are classic trap answers even when the clinical topic is familiar. Run a 60-second scan: breathing work and oxygenation, perfusion and end organs, neuro baseline, likely infection sources, and devices that can fail quietly. When two answers feel partly right, pick the one that reduces imminent...