Diagnosis:
This is pathological diagnosis
Muscle biopsy:
Perimuscular infiltrate of large macrophages with PAS positive granular cytoplasm (slightly basophilic on H and E stain). Lymphocytic infiltrate.
Usually in deltoid
This is pathological diagnosis
Perimuscular infiltrate of large macrophages with PAS positive granular cytoplasm (slightly basophilic on H and E stain). Lymphocytic infiltrate.
Usually in deltoid