title: Postirradiation multiple minute digitate porokeratosis.
abstract: BACKGROUND
  Development of multiple minute digitate hyperkeratoses (MMDH) after irradiation has been reported previously. The keratotic lesions in these cases were confined within the irradiation field, and histopathological examination disclosed a focal column of parakeratosis (cornoid lamella) arising from an epidermis devoid of granular layer.
  
  
  OBJECTIVE
  We describe a 78-year-old woman who developed multiple, discrete, tiny, filiform, keratotic papules on the anterior aspect of the right chest wall, 13 months after postmastectomy cobalt irradiation therapy for mammary infiltrating ductal carcinoma.
  
  
  CONCLUSIONS
  Postirradiation MMDH represents a peculiar radiation-induced disorder that we believe should be distinguished from other cases of MMDH and included within the spectrum of porokeratosis.
authors.affiliation: Department of Dermatology, Hospital del Mar, IMAS, Barcelona, Spain. 93329@imas.imim.es
authors.forename: R M
authors.initials: RM
authors.lastname: Pujol
authors.forename: E
authors.initials: E
authors.lastname: Perez-Losada
authors.forename: X
authors.initials: X
authors.lastname: Matias-Guiu
authors.forename: J
authors.initials: J
authors.lastname: Fuentes
authors.forename: M C
authors.initials: MC
authors.lastname: Alonso
authors.forename: A
authors.initials: A
authors.lastname: Alomar
authors.forename: J
authors.initials: J
authors.lastname: Craven-Bartle
mesh_terms: D000368:Aged; D001706:Biopsy; D001943:Breast Neoplasms / Q000532:radiotherapy / Q000601:surgery; D018270:Carcinoma, Ductal, Breast / Q000532:radiotherapy / Q000601:surgery; D003037:Cobalt Radioisotopes / Q000009:adverse effects*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D015411:Mastectomy, Modified Radical; D017499:Porokeratosis / Q000209:etiology* / Q000473:pathology*; D011878:Radiotherapy / Q000009:adverse effects* / Q000379:methods
chemical_list: D003037:Cobalt Radioisotopes