title: Basosquamous carcinoma: treatment with Mohs micrographic surgery.
abstract: BACKGROUND
  Basosquamous carcinoma (BSC) is a rare tumor defined as a basal cell carcinoma (BCC) differentiating into squamous cell carcinoma (SCC). It is reported to have a high rate of recurrence with standard wide local excision. The aim of the current study was to report a large series of patients with BSC treated with Mohs micrographic surgery (MMS).
  
  
  METHODS
  The prospective, multicenter case series included all patients in Australia treated with MMS for BSC, who were monitored by the Skin and Cancer Foundation Australia between 1993 and 2002.
  
  
  RESULTS
  Most of the 178 tumors (95.6%) were located in the head and neck area. Recurrent tumors occurred in 47.8% of patients. The tumors were diagnosed initially as BCC in 87.4% and as SCC in 12.0% of patients. Perineural invasion was recorded in 7.9% of patients with data available. Most of these (69.0%) were previously recurrent tumors. Of 98 patients who completed a 5-year follow-up period after MMS, 4 (4.1%) had disease recurrence.
  
  
  CONCLUSIONS
  The low 5-year disease recurrence rate of BSC with MMS emphasized the importance of margin-controlled excision using MMS.
authors.affiliation: Oculoplastic and Orbital Division, Department of Ophthalmology and Visual Sciences, Royal Adelaide Hospital, University of Adelaide, Adelaide, South Australia, Australia.
authors.forename: Igal
authors.initials: I
authors.lastname: Leibovitch
authors.forename: Shyamala C
authors.initials: SC
authors.lastname: Huilgol
authors.forename: Dinesh
authors.initials: D
authors.lastname: Selva
authors.forename: Shawn
authors.initials: S
authors.lastname: Richards
authors.forename: Robert
authors.initials: R
authors.lastname: Paver
mesh_terms: D000328:Adult; D000368:Aged; D001132:Arm; D002281:Carcinoma, Basosquamous / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006258:Head and Neck Neoplasms / Q000601:surgery*; D006801:Humans; D007866:Leg; D008297:Male; D008875:Middle Aged; D015580:Mohs Surgery / Q000379:methods*; D009364:Neoplasm Recurrence, Local