进行性骨化性肌炎(Myositis Ossifi-cans Progressiva)是一种罕见遗传性疾病。作者见1例报告如下。患儿,女,3岁。颈项部肿块进行性增大影响颈项活动一年。于一年前项部疼痛肿胀,继之局部出现2～3个小结节,质硬,逐渐增大且向左肩胛内侧延伸,影响颈项活动。家族中无类似疾患。患儿足月顺产,第3胎第3产。无其它特殊病史。体检:一般 Myositis Ossifi-cans Progressiva is a rare genetic disease. The author see a case report is as follows. Children, female, 3 years old. Progressive cervical neck mass affect neck activity for one year. A year ago, the pain of the neck swelling, followed by the local emergence of 2 to 3 small nodules, hard, gradually increasing and extending to the left medial scapular, affecting neck activity. No similar disease in the family. Children with full-term follow-up, the first 3 births. No other special medical history. Physical examination: general