Conclusions Myositis was one of the uncommon clinical subtypes of IOIP, Superior rectus was the most involved muscle, followed by lateral, medial and inferior rectus.

• 结论肌炎型是特发性眼眶炎性假瘤中较少见的临床亚型之一,以上直肌受累最常见,其次为外直肌、内直肌与下直肌。