Author Affiliations: Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts.
A 52-year-old woman was seen with progressive muscle pain, normal strength on physical examination, and mildly elevated serum creatine kinase level. The results of magnetic resonance imaging and a muscle biopsy showed involvement of muscle fascia with sparing of muscle perimysium and endomysium (Figure).
Our patient had myofasciitis, which is an increasingly recognized variant overlapping with inflammatory myopathy.1
Greenberg SA, Amato AA. Myofasciitis: Imaging and Pathology. Arch Neurol. 2012;69(3):406. doi:10.1001/archneurol.2011.1159