Relationship of treatment delay with surgical defect size from keratinocyte carcinoma (basal cell carcinoma and squamous cell carcinoma of the skin)

Abstract

Larger keratinocyte carcinoma (KC) lesions are associated with higher morbidity. This study examined the association of potentially modifiable characteristics, including treatment delay, with KC defect size after Mohs micrographic surgery (MMS). A stratified random sample of patients treated for KC with MMS were selected for telephone interview. Two hundred and nineteen interviews were completed (refusal rate 24%). Regression models were used to examine the predictors to defect size and delay. Anatomic site, age, histology, and gender predicted defect size (R(2) = 0.39) and were used as control variables. Self-reported delay between initial physician examination and MMS predicted defect size (p = 0.0004), with greater than 1 y delay being associated with a doubling of defect size (adjusted odds ratio (OR) 2.0; 95% confidence interval (CI) 1.3-3.1). Delays of this duration were associated with initial examination by a primary provider (unadjusted OR 3.9; 95% CI 1.7-8.8), misdiagnosis (unadjusted OR 6.8; 95% CI 2.5-18.7), being treated without biopsy (unadjusted OR 23.3; 95% CI 6.5-83.7), and multiple surgical removals (unadjusted OR 6.2; 95% CI 2.5-15.5). All but provider specialty were independent predictors of delay. Attention to processes of care delivery for KC may have a greater impact on morbidity than efforts are earlier detection by the public.

Figure 1. Definition of Delay Intervals

Time line illustration and definitions of time points and delay intervals (all intervals were measure until the date of Mohs surgery, which was obtained from the medical record).