患者　女 ,3 0岁。 10年前左小指冻伤后发现近节屈侧有一黄豆大小的肿物 ,局部无红肿热痛感。指关节活动自如。近2个月肿物突然增大并伴有疼痛入院。查体 :左手小指近节屈侧有一凸出肿物约 2 .2ｃｍ× 2 .5ｃｍ ,皮温、肤色正常 ,质地硬 ,活动度差 ,轻度压痛 ,近侧指关节屈曲受 Female patient, 30 years old. 10 years ago, after the left-handed little finger had suffered a frostbite, it was found that there was a soy-sized tumor on the proximal flexion, and there was no local swelling and thermal pain. Knuckles move freely. In the last 2 months, the mass suddenly increased and he was admitted to hospital with pain. Physical examination: The left hand pinkie has a protruding mass of approximately 2.2 cm x 2.5 cm near the flexor side of the joint. The skin temperature and color are normal, the texture is hard, the activity is poor, mild tenderness, and the flexion of the proximal knuckle is affected.