title: Randomized control trial of fluorescence-guided surgical excision of nonmelanotic cutaneous malignancies.
abstract: OBJECTIVE
  Protoporphyrin IX (PpIX) is an endogenous photosensitizer commonly used in photodynamic therapy. This study sought to assess if PpIX fluorescence can be applied clinically to improve the delineation and excision of nonmelanotic cutaneous malignancies.
  
  
  METHODS
  Prospective, randomized control trial.
  
  
  METHODS
  A tertiary care skin cancer clinic.
  
  
  METHODS
  Fifty-one individuals with 65 cutaneous nonmelanotic cervicofacial malignancies were randomized into two groups. The control group was offered surgical excision with surgeon-delineated excision margins. The study group had their excision margins delineated while under fluorescence.
  
  
  METHODS
  The delineated lesion borders, proposed excision margins, and projected lesion-free areas were compared among the two groups. Pathologic resection margins and completeness of excision were also assessed.
  
  
  RESULTS
  Excisions performed using fluorescence delineation were 20% narrower (p < .01) and 17% shorter (p < .04), with 35% less lesion-free skin excised (p < .005). All lesions excised using photodelineation had clear pathologic resection margins. A significant number of lesions excised via the traditional approach required reexcision owing to pathologically positive peripheral margins (p < .001). Follow-up at 2 years revealed no lesion recurrence among the study group and one recurrence within the control group.
  
  
  CONCLUSIONS
  The results demonstrate a reliable and novel application for photodynamic photodelination and support its application in the excision of nonmelanotic cutaneous malignancies.
authors: Department of Otolaryngology, Schulich School of Medicine, University of Western Ontario, London, Ontario, Canada.
authors: Michael G
authors: MG
authors: Brandt
authors: Corey C
authors: CC
authors: Moore
authors: Kevin
authors: K
authors: Jordan
mesh_terms: D000368:Aged; D005260:Female; D005453:Fluorescence; D006801:Humans; D008297:Male; D017319:Photosensitizing Agents / Q000627:therapeutic use*; D011446:Prospective Studies; D011524:Protoporphyrins / Q000627:therapeutic use*; D012878:Skin Neoplasms / Q000188:drug therapy* / Q000601:surgery*; D025321:Surgery, Computer-Assisted
chemical_list: D017319:Photosensitizing Agents; D011524:Protoporphyrins; C028025:protoporphyrin IX