title: Staged excision for lentigo maligna and lentigo maligna melanoma: A retrospective analysis of 117 cases.
abstract: BACKGROUND
  Complete surgical excision for lentigo maligna (LM) and LM melanoma (LMM) in the head and neck region may be challenging because of potential significant subclinical extension.
  
  
  OBJECTIVE
  We sought to review clinical and histologic features of LM and LMM and determine surgical margin necessary for complete excision.
  
  
  METHODS
  We conducted a retrospective study of 117 LM and LMM cases treated with a staged margin-controlled excision technique with rush paraffin-embedded sections.
  
  
  RESULTS
  The mean total surgical margin required for excision of LM was 7.1 mm and was 10.3 mm for LMM. Of the tumors diagnosed as LM on initial biopsy specimen, 16% were found to have unsuspected invasion. Total surgical margin was associated with initial clinical lesion diameter.
  
  
  CONCLUSIONS
  Retrospective and single-institution experience are limitations.
  
  
  CONCLUSIONS
  This study corroborates that the standard excision margins for LM and LMM are often inadequate and occult invasive melanoma occurs in LM. An excision technique with permanent sections using a team of dermatopathology and surgery that carefully examines the central tumor and the surgical margins is reliable for the treatment of LM and LMM.
authors.affiliation: Department of Dermatology, Memorial Sloan-Kettering Cancer Center, New York, New York 10022, USA.
authors.forename: Carole
authors.initials: C
authors.lastname: Hazan
authors.forename: Stephen W
authors.initials: SW
authors.lastname: Dusza
authors.forename: Ruby
authors.initials: R
authors.lastname: Delgado
authors.forename: Klaus J
authors.initials: KJ
authors.lastname: Busam
authors.forename: Allan C
authors.initials: AC
authors.lastname: Halpern
authors.forename: Kishwer S
authors.initials: KS
authors.lastname: Nehal
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006258:Head and Neck Neoplasms / Q000473:pathology / Q000601:surgery*; D006801:Humans; D018327:Hutchinson's Melanotic Freckle / Q000473:pathology / Q000601:surgery*; D008297:Male; D008545:Melanoma / Q000473:pathology / Q000601:surgery*; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D009378:Neoplasms, Multiple Primary / Q000473:pathology / Q000601:surgery*; D012189:Retrospective Studies; D012878:Skin Neoplasms / Q000473:pathology / Q000601:surgery*; D013514:Surgical Procedures, Operative / Q000379:methods