Fig. 30.1 Acid maltase deficiency. (a) H&E shows a vacuolar myopathy. (b) ATPase at pH 9.4 shows that the myofibers that contain vacuoles are predominantly type 2. There is also type…
Fig. 28.1 Muscle biopsy findings of the left quadriceps muscle. (a), H&E shows excessive variation in fiber diameter without increased internal nuclei, muscle fiber necrosis or regeneration. Nemaline rods and…
Fig. 27.1 Muscle biopsy findings of the left quadriceps. (a) H&E showing excessive variation of fiber diameters and mild increase in endomysial connective tissue. ATPase histochemistry (not shown) demonstrates that…
Fig. 26.1 Muscle biopsy findings of the right quadriceps muscle. (a) H&E showing excessive variation in fiber diameter, and increased numbers of fibers with centrally placed nuclei. (b) NADH-TR histochemistry…
Fig. 25.1 Muscle pathology in merosin deficiency. (a) H&E stained cryostat section shows an end stage muscle with few remaining fibers. Immunostaining shows intact alpha-dystroglycan (b) and dystrophin (c, DYS2…
Fig. 24.1 Duchenne muscular dystrophy . (a) H&E shows dystrophic changes (asterisks indicate necrotic fibers, arrow indicates myofiber with abnormal internal architecture). (b) Immunostaining for dystrophin N terminus (DYS3) shows…
Fig. 22.1 H&E stained muscle biopsy section (a) shows striking endomysial fibrosis, abundant severely atrophic fibers and pyknotic nuclear clumps, and a few hypertrophic fibers. A split fiber is also…
Fig. 21.1 Muscle biopsy sections stained with H&E (a) shows markedly increased fiber size variation with a group of atrophic fibers (arrows), some hypertrophic fibers (#), and split fibers (∗)…
Fig. 19.1 Hydroxychloroquine myopathy. (a), Hematoxylin and eosin stain (HE) shows many scattered severely atrophic fibers , which are basophilic and contain sarcoplasmic vacuoles (arrows). Gomori trichrome stain (GT) shows…
Fig. 20.1 Calciphylaxis. (a), A picture of the patient’s back shows a large area of skin eschar (arrows). (b), Muscle biopsy with HE stain shows calcification of media tunica and…
