PMC9732722_01
(A) Electrocardiogram of patient 1 on admission. (B) Clinical course of patient.
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F1
CPK, CK-MB, and troponin gradually decreased (Figure 1). At 6-month follow-up, laboratory tests revealed CPK to be 212 U/L, CK-MB 3.84 ng/ml, CTnI 0.08 ng/ml, and CTnT 0.016 ng/ml (Figure 1).
PMC9732722_02
Chest computed tomography and histopathological changes of the lung biopsy in case 2. Chest computed tomography before (A) and after (B) onset of pneumonia. (C) Hematoxylin-eosin staining (x20). (D) Periodic acid-Schiff staining (x10). (E) Hexosamine silver staining (x10). (F) Antacid staining (x10).
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F2
Lung biopsy showed alveolar wall edema suggestive of alveolitis, with a large amount of fibrinous exudate and lymphocytic infiltrate in the alveolar space, with no hyaline membrane formation (Figure 2).