title: Development of pylomatrixoma after the subcutaneous injection of methotrexate for the treatment of juvenile idiopathic arthritis.
authors.forename: Elvira
authors.initials: E
authors.lastname: Afonso Pérez
authors.forename: Carlos
authors.initials: C
authors.lastname: Garcia Porrua
authors.forename: Iria Margarita
authors.initials: IM
authors.lastname: Castiñeiras Mato
authors.forename: Fernando
authors.initials: F
authors.lastname: Bal Nieves
mesh_terms: D018501:Antirheumatic Agents / Q000627:therapeutic use*; D001171:Arthritis, Juvenile / Q000188:drug therapy*; D002648:Child; D005260:Female; D006801:Humans; D007279:Injections, Subcutaneous / Q000009:adverse effects; D008727:Methotrexate / Q000627:therapeutic use*; D009375:Neoplasms, Glandular and Epithelial / Q000175:diagnosis* / Q000209:etiology; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000209:etiology
chemical_list: D018501:Antirheumatic Agents; D008727:Methotrexate