Fig. 1
From: ‘Dusty core disease’ (DuCD): expanding morphological spectrum of RYR1 recessive myopathies
DuCD morphological spectrum. Dusty cores: irregular areas of reddish-purple granular material deposition at GT stain (a, d, g and i) corresponding to areas of devoid ATPase activity (c, f and h) and decreased or increased enzymatic activity at oxidative stains (b, e and l), sometime occurring in the same core side-by-side (b and e; arrows) or concentric with “targetoid” appearance (b, i and l; arrowheads). Note type 1 fibre uniformity (c, f and h) and prominent nuclear internalization (d and g). (a-c: p12, 28 years; d-f: p11, 48 years; g and h: p19, 4 years; i and l: p24, 1 year)