患者,男,12岁。因右大腿肿块伴疼痛半月,发热39℃,皮温增高,有波动感,经热敷抗菌治疗,肿块逐渐增大。B超检查:右下肢胭窝上可见一范围广泛的混合性回声区,9.5cm×8.7cm×6.2cm,边界清楚,内部呈低水平回声,内可见条带状强回声及低回声区。超声诊断:蜂窝组织炎。手术所见:皮下可见肌肉呈坏死样改变,且大量陈旧性凝血块,无积脓。病理诊断:为非霍杰金氏恶性淋巴瘤。 Patient, male, 12 years old. Due to the right thigh mass with pain for half a month, fever 39 °C, skin temperature increased, there is a sense of volatility, antibiotic treatment by heat, the tumor gradually increased. B-ultrasonic examination: A wide range of mixed echo areas can be seen on the right lower extremity axillary fossa, 9.5 cm x 8.7 cm x 6.2 cm, with clear boundaries, a low-level echo in the interior, and strong echoes and hypoecho areas in the strip. Ultrasonography: Cellulitis. Surgical findings: muscles under the skin showed necrotic changes, and a large number of old clot, no accumulation of pus. Pathological diagnosis: Non-Hodgkin’s lymphoma.