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
An 11-month-old girl presents to a pediatrician with her mother who is concerned about a red discoloration with a rectangular shape over the child’s left buttock presenting since the previous night. The mother also mentions that her daughter has been crying excessively. There is no history of decreased breast feeding, fever, joint swelling, vomiting, decreased urine output, or change in color of urine or stools. The mother denies any history of injury. However, she mentions that the infant had suffered from a self-limiting upper respiratory infection three weeks before. There is no history of bruising or bleeding in the past. The mother informs the doctor that she has a brother (the patient’s maternal uncle) with hemophilia A. On physical examination, the girl’s temperature is 37.0°C (98.6°F), pulse rate is 160/min, and respiratory rate is 38/min. The lesion presents over the left buttock and is tender on palpation. What is the most likely diagnosis?
assistant
Abusive bruise