PMC5909150_01
PMC5909150_02
(a) Preserved fascicular architecture (H and E, x40); (b and c) perifascicular atrophy (black arrow) (H and E, x200); (b) inset- normal endomyseal collagen (Masson Trichrome, x200); (d) perimyseal perivascular lymphocytic infiltrate (black arrow) (H and E, x200); (e) endomyseal perivascular lymphocytic infiltrate (black arrow) (H and E, x200); (f) basophilic regenerating myofibre (black arrow) and myonecrosis (red arrow) (H and E, x200)
AIAN-21-70-g001.jpg
PMC5909150_02_AIAN-21-70-g001.jpg
F1
An emergent left vastus lateralis muscle biopsy was done that conclusively confirmed the diagnosis of JDM [Figure 1].