骨巨细胞瘤是一种常见的肿瘤,好发干四肢长骨的骨端,尤以股骨下端、胫骨上端为多见,坐骨、髂骨、椎体、肩胛骨、指骨、腱鞘等处少见,发生在髌骨的则属罕见。我们遇到2例,报告如下。例1:患者方某,男,28岁,战士。1979年3月右膝关节疼痛,行走伴有弹响,不能持重,但仍能行走。检查:全身情况良好,右侧股四头肌明显萎缩,右大腿较左大腿细4.5厘米,膝关节肿胀,膝外压痛(+),浮髌感(+),髌骨研磨试验(+)。X 线所见:髌骨正位约有1.7×2.2厘米呈囊性改变,溶骨性破坏,边缘锐利、整齐,四周有轻度硬化,囊内无骨结构,周围无软组织肿块影。侧 Giant cell tumor of the bone is a common type of tumor. The bone ends of the long bones of the dry limbs, especially the lower part of the femur and the upper part of the humerus, are rare. The sciatic bone, the sacrum, the vertebral body, the scapula, the phalanx, and the tendon sheath are rare. The cheekbones are rare. We encountered 2 cases and the report is as follows. Example 1: Patient Fang M, male, 28 years old, soldier. In March 1979, the right knee was painful and walking, accompanied by a snapping sound. He could not hold weight, but he could still walk. Examination: The whole body is in good condition. The right quadriceps muscle is markedly atrophied. The right thigh is 4.5 centimeters thinner than the left thigh, knee joint swelling, knee tenderness (+), floating sensation (+), tibia grinding test (+). X-ray findings: The zygomatic position of the sacrum was approximately 1.7 x 2.2 cm with cystic changes, osteolytic destruction, sharp and neat edges, mild hardening around the sacrum, no bone structure in the capsule, and no soft tissue mass around. side