我院自1989年1月到91年12月共发现晚发性佝偻病21例,现将所见病例分析如下: 1.临床资料:5～7岁8例,男3例,女5例;7～14岁13例,男6例,女7例。21例均述双下肢痛,尤以膝关节痛为主,负重、久站、活动量较大时疼痛加重,一般均有食欲不振、毛发干枯、稀疏易折。但局部无红肿。其它症状有:入睡时多汗,多梦易醒(7例),肋弓外翻(13例),鸡胸(6例),7、8岁仍未替换乳齿(9例),有的牙齿质脆易掉碎块,轻 Our hospital from January 1989 to December 1991 were found in 21 cases of late rickets, now see the case as follows: 1. Clinical data: 5 to 7 years old in 8 cases, 3 males and 5 females; 7 ~ 14 years old in 13 cases, 6 males and 7 females. All 21 cases were described as having lower extremity pain, especially knee pain, weight bearing and standing for a long time. The pain was aggravated when the activity was high. Generally, the patients suffered from poor appetite, dry hair, and thin and easy to fold. But no local swelling. Other symptoms were asymptomatic sweating, dreaming (7 cases), valgus arch (13 cases), chicken breast (6 cases), no replacement of milk teeth (9 cases) at 7 and 8 years old, and some dentine Crisp easily broken pieces, light