目的　研究足跗骨在不同生长阶段发育变异的发生率 ,年龄分布和形态特点。方法　对出生后～ 18岁正常人群右足正、侧位X线照片 2 0 3 5例 (男 10 68例 ,女 967例 ;1岁一个年龄组 ,每组 3 8～ 98例 )进行观察。结果　出现发育变异 72 1例 (3 5 .43 % ) ,其中男 3 5 6例 (3 3 .3 3 % ) ,女 3 65例 (3 7.75 % )。暂时性发育性跟骨刺 (1.10 % )和跟骨多骨化中心 (0 .5 0 % )见于 0～ 5岁 ;内楔骨不规则骨化 (0 .70 % ) ,内楔骨双骨化中心 (0 .95 % )和舟骨双骨化中心 (1.74% )见于 2～ 8岁 ;跟骨营养血管孔 (3 .44 % )和跟骨骨髓窦 (16.10 % )见于 1～ 18岁 ;距骨三角骨 (2 .64 % ) ,胫外骨 (或副舟骨 ) (6.18% )和跟距骨桥 (7.0 4% )见于 7～ 18岁。结论　足跗骨生长发育变异对常见足部疾病的鉴别诊断有重要意义 Objective To study the incidence, age distribution and morphological characteristics of the developmental variation of the footbone in different growth stages. Methods A total of 20 035 cases of right foot orthopedic and lateral radiographs of postnatal age 18 to 18 years old were included in the study. There were 10 68 males and 967 females, and one age group of 1 year old and 38 to 98 females per group. Results There were 72 cases of developmental variation (35.43%), of which 356 were male (33.33%) and female was 655 (3. 7.75%). Temporary development of calcaneus (1.10%) and calcaneal multiple ossification center (0. 05%) were seen in 0-5 years; irregular internal ossification (0.70%), The center (0.95%) and the scaphoid metaplasia center (1.74%) were found between 2 and 8 years old. The calcification vessels in the calcaneus (3.44%) and the calcaneal bone marrow (16.10%) were found between 1 and 18 years old. The talus triangular bone (2.64%), the tibial (or accessory) bone (6.18%) and the talus bridge (7.04%) were found between 7 and 18 years old. Conclusion Foot bones growth and development of common foot disease differential diagnosis of great significance