system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
10 days old baby develops swelling left in posterior cervical area, bluish in appearance, increase in size on crying and brilliently transilluminant
assistant
The correct answer is  Ans. is 'c' i.e., Cystic hygroma Cystic hygroma Usually present in neonate or early infancy. Filled with lymph Commonly present in posterior cervical area, axilla, mediastinum, parotid, floor of mouth. Soft & paially compressible Size increase during crying, coughing Brilliently transilluminant Sometimes size increase with age or during infection. Treatment is complete excision.