A 42-year-old man presented with seizures and approximately 300 palpable intramuscular cysts, with 54 cysts on his head, face, and neck, 110 on his chest and back, 86 on his arms, and 52 on his legs (Panel A).
During the 3 years preceding presentation, he reported having a chronic headache and witnessing the development of intramuscular cystic nodules on his arms and his upper body.
What is the diagnosis?
