Fig. 3

Pathological examination using hematoxylin–eosin (H&E) staining. Photo A reveals microscopic findings in the myocardium of the male patient (a: original magnification 400×, b: original magnification 1000×). A necrotic lesion (darker pink area) was found in the male patient, which was accompanied by slight lymphocytic infiltration (a and b). Contraction band necrosis was also found at high-power view (b). Photos c and d reveal microscopic findings in the myocardium of the female patient (c: original magnification 400×, d: original magnification 1000×). In the female patient, the necrotic lesion was very limited and was not accompanied by lymphocytic infiltration (c). Necrotic lesion revealed an acidophilic change in the myometrium. However, contraction band necrosis was not apparent at high-power view (d)