title: Solitary painful piezogenic pedal papule in a patient with rheumatoid arthritis.
mesh_terms: D001172:Arthritis, Rheumatoid / Q000150:complications*; D001706:Biopsy; D005260:Female; D005533:Foot Dermatoses / Q000209:etiology* / Q000473:pathology / Q000628:therapy; D006801:Humans; D008875:Middle Aged; D011312:Pressure