This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'Hematoma of the sternomastoid muscle detected in a 16 days old infant requires: \nSelect and explain. \nA. Immediate surgical evacuation, B. Surgical intervention within 2 weeks, C. Prophylactic antibiotic therapy, D. No immediate therapy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Sternomastoid tumour/Hematoma\n\nPresents at about 7-10 days after birth\nSituated at the junction of upper and middle third of the muscle\nEtiology: rupture of sternocleidomastoid muscle fibres and blood vessels, due to:\n\n– hematoma and cicatricial contracture\n– Difficult breech delivery\n– Attempted delivery after shoulder dystocia\n– Excessive lateral flexion of neck following normal delivery.\n\nClinical features: Transient torticollis\nTreatment:\n\n– No treatment required, disappears spontaneously by 6 months of age\n– Gentle movements and stretching of muscle done after feeds is useful\n– Do not massage.', 'role': 'assistant'}]