Ocular myositisの2例

Two cases of ocular myositis

　経過の異なる2症例の外眼筋炎を経験した．1例は，両眼に長期にわたり炎症発作を繰り返したためステロイドの内服を切り難い症例であった．肥厚した外眼筋の数や肥厚程度は再発と治療に応じて変化した．もう1例は，急性に発症し，片眼性の主として外直筋に炎症を生じ，外眼筋の拘縮を生じるという珍しい例であった．眼球運動速度検査とforced duction testから，外眼筋炎における眼球運動制限は，筋の収縮要素と伸展要素の両者，特に後者の障害により発生すると考えられた．

We observed 2 cases of ocular myositis. A 58 -year-old male developed recurrent attacks of orbital inflammation bilaterally. The number of involved extraocular muscles and the thickness of the affected muscle, as observed by computed tomo-graphy, fluctuated in accordance with the therapy and recurrences. Withdrawal of systemic corticos-teroid was immediately followed by another recur-rence. A 45-year-old female presented with an acute painful inflammation if the right lateral rectus muscle. Contracture of the affected muscle persisted even after the inflammation had subsided.

On the basis of saccade velocity test and forced duction test, we found that the restricted eye movement in these cases was due to impairment of contractile and particularly extensive elements in the involved extraocular muscles.

Rinsho Ganka (Jpn J Clin Ophthalmol) 42(9) 1037-1040, 1988