Factors leading to the use of alternate treatment modalities following transoral laser excision of T1 and T2 glottic squamous cell carcinoma.
BACKGROUND
CO(2) transoral laser surgery and radiotherapy are both recognized as acceptable treatments for early glottic squamous cell carcinoma (SCC) with similar rates of cure. The reasons why some of the patients in our series undergoing laser resection as their primary modality of treatment subsequently underwent radiotherapy or chemoradiotherapy will be discussed.


METHODS
Retrospective study between January 2003 and August 2010 of all T1 and T2 glottic SCCs treated with laser resection at a major tertiary centre. Tis lesions were excluded. A review of the cases in which primary control with laser resection was not achieved was undertaken. Failure was defined as patients treated initially with laser resection who subsequently received radiotherapy, combined chemoradiotherapy or open surgery for the same tumour. Factors leading to failure were analysed, including tumour location, histology, stage and patient factors.


RESULTS
Thirty-one patients were identified, with the majority (27) having T1 disease. Mean number of laser excisions per patient was 1.7. Local control rate was 71% with laser alone. One patient had nodal recurrence with no primary recurrence. Mean follow-up was 32 months. Of the nine patients in whom local control was not achieved with laser alone, all had tumour at or crossing the anterior commissure. Four patients were deemed potentially curable with further excision but chose radiotherapy. Two patients were deemed appropriate for radiotherapy and chemoradiotherapy. Three patients had loco-regional recurrence and underwent laryngectomy. All had anterior commissure involvement.


CONCLUSIONS
Transoral laser excision is a safe, function-preserving treatment of early glottic SCC. Anterior commissure involvement was the major factor for potential failure with laser resection in T1 and T2 glottic tumours.
Department of Otorhinolaryngology, Head and Neck Surgery, Monash Medical Centre, Melbourne, Victoria, Australia. an.pham@live.com.au
Truong An
TA
Pham
Ryan
R
De Freitas
Elizabeth
E
Sigston
Neil
N
Vallance
D000368:Aged; D000369:Aged, 80 and over; D002294:Carcinoma, Squamous Cell / Q000401:mortality / Q000473:pathology / Q000601:surgery* / Q000628:therapy; D059186:Chemoradiotherapy, Adjuvant; D005260:Female; D005500:Follow-Up Studies; D005931:Glottis / Q000473:pathology / Q000601:surgery*; D006801:Humans; D007822:Laryngeal Neoplasms / Q000401:mortality / Q000473:pathology / Q000601:surgery* / Q000628:therapy; D007825:Laryngectomy; D054020:Lasers, Gas / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000401:mortality / Q000473:pathology / Q000601:surgery; D009367:Neoplasm Staging; D018714:Radiotherapy, Adjuvant; D012189:Retrospective Studies; D016019:Survival Analysis; D017211:Treatment Failure