COVID‐19 pneumonia can cause irreversible lung damage in dermatomyositis with pre‐existing interstitial lung disease. (9th August 2021) - Hama, Satoshi; Akiyama, Mitsuhiro; Shimada, Tatsuya; Higashida‐Konishi, Misako; Takei, Hiroshi; Izumi, Keisuke; Oshima, Hisaji; Okano, Yutaka