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We report a patient with both linear morphea and a focal form of continuous muscle fiber activity (CMFA) in the right leg.
Case report. A 17-year-old boy presented with muscle twitching and painless cramps of the right leg that had gradually progressed over the previous 6 months. At the same time, a longitudinal strip of atrophic hairless skin appeared along the anterolateral aspect of his right leg. It extended from a point 4 cm below an old scar over the patella, which was the result of an accidental skin laceration at age 11, up to the groin. The patient developed an intermittent involuntary contraction of the anterior thigh and, less frequently, leg muscles (figure). The episodes were spontaneous but often triggered by an attempt to move, particularly knee extension. They occurred many times a day, persisted during sleep, lasted 2 to 10 minutes, and subsided soon after rest. Voluntary relaxation of the affected muscles was slow and incomplete. His medical and …
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