title: Lichen planus arising in radiation therapy treatment sites.
abstract: A 59-year-old woman with a history of metastatic breast cancer presented for evaluation of hyperpigmented, reticulated, pruritic plaques on her left arm and left thigh after undergoing localized radiation therapy to the left breast and left thigh. These painful plaques with surrounding erythema appeared to follow Blaschko lines and punch biopsy results were histologically consistent with lichen planus. Herein we report a case of radiation-induced lichen planus.
authors.affiliation: University of Chicago Hospitals Section of Dermatology, 5841 South Maryland Ave, MC 5067, Chicago, IL 60637, USA. irene.vergilis@uchospitals.edu
authors.forename: Irene Josephine
authors.initials: IJ
authors.lastname: Vergilis-Kalner
authors.forename: Vishakha
authors.initials: V
authors.lastname: Sharma
authors.forename: Aisha
authors.initials: A
authors.lastname: Sethi
mesh_terms: D001943:Breast Neoplasms / Q000628:therapy; D005260:Female; D006801:Humans; D008010:Lichen Planus / Q000175:diagnosis / Q000209:etiology* / Q000473:pathology; D008875:Middle Aged; D011855:Radiodermatitis / Q000175:diagnosis / Q000209:etiology* / Q000473:pathology; D018714:Radiotherapy, Adjuvant / Q000009:adverse effects*