血友病并发下颌角区外伤性血肿１例报告刘某，男，５岁，因左下颌角区碰伤后肿胀，张口困难５天，于１９９２年６月２０日入院。入院时发现左下颌角区有一直径６ｃｍ的半球状肿物，皮肤青紫色，触之坚韧，压痛明显，似有波动感，局部无发热，张口为１ｃｍ。口腔粘膜无异常... A case report of haemophilia with traumatic hematoma in mandibular angle area Liu, male, 5 years old, was admitted to hospital on June 20, 1992 because of swelling after swelling in the left mandibular angle area and mouth opening difficulties for 5 days. Admission found that the left mandibular angle area has a diameter of 6cm hemispheric tumor, skin bruising, touch tough, obvious tenderness, it seems a sense of volatility, local fever, mouth 1cm. No abnormal mucosa ...