title: A 'migrant' mass of the forehead: diagnosis and treatment.
abstract: BACKGROUND
  Primary cutaneous large B-cell lymphoma, leg type, is a rare and aggressive neoplasm as defined by the World Health Organization/European Organisation for Research and Treatment of Cancer classification of cutaneous lymphomas. In some cases this disease may simulate other forms of benign or malignant solid tumours.
  
  
  METHODS
  We present a case of a 74-year-old man showing a quickly 'migrant' mass on his forehead. First skin biopsy, ultrasound and magnetic resonance images were not significant. A deeper biopsy revealed a pathology consistent with a primary cutaneous diffuse large B-cell lymphoma leg type.
  
  
  RESULTS
  The patient was successfully treated with only local radiotherapy (total dose: 32.4 Gy). At 1-year follow-up there were no recurrences.
  
  
  CONCLUSIONS
  To the best of our knowledge, this is the second case of a primary cutaneous diffuse large B-cell lymphoma leg type developed as a quickly 'migrant' lesion. In contrast with the first report, our case developed in a non-leg site. From these two cases, we should bear in mind that aggressive and quickly migrant cutaneous or subcutaneous masses might mask a lymphomatous disease.
authors.affiliation: Department of Plastic and Reconstructive Surgery, I.R.C.C.S. Policlinico San Donato, Università degli Studi di Milano, Via Morandi 30, 20097 San Donato Milanese, Milan, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Marchesi
authors.forename: F
authors.initials: F
authors.lastname: Leone
authors.forename: C
authors.initials: C
authors.lastname: Menicanti
authors.forename: P C
authors.initials: PC
authors.lastname: Parodi
authors.forename: L
authors.initials: L
authors.lastname: Vaienti
mesh_terms: D000368:Aged; D001706:Biopsy; D005546:Forehead / Q000473:pathology*; D006801:Humans; D016403:Lymphoma, Large B-Cell, Diffuse / Q000473:pathology* / Q000532:radiotherapy; D008297:Male; D012878:Skin Neoplasms / Q000473:pathology* / Q000532:radiotherapy
keywords: Forehead; Lymphoma; Migrant mass; Radiation therapy