A 51-year-old woman visits her primary care doctor to address a rash, pruritus, myalgias and muscle weakness. The rash was an erythematous blanching patch spread across her chest in a V shape. She had also noticed that her fingernail folds were red and swollen.
Can you diagnose the patient? Use the differential builder in VisualDx as a guide.
A. Systemic lupus erythematosus
B. Polymorphous light eruption
C. Allergic contact dermatitis
See the next page for the correct diagnosis.