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Basal cell carcinomas are the commonest solid malignancy in humans and thought to grow faster in the periocular region. We measured growth rates between periocular and non-periocular nodular basal cell carcinomas in the head and neck region from high-resolution digital photos and operative notes. The non-periocular basal cell carcinomas (head and neck) showed a mean tumour volume doubling time of 129.8 ± 21.74 (n = 79) days, and the periocular basal cell carcinoma a mean of 177.5 ± 37.21 (n = 47) days. The unpaired t-test with Welch correction showed that this difference was not significant (p = 0.2719). The mean tumour volume doubling time was 147.59 ± 37.75 days for head and neck basal cell carcinomas overall. For the first time, tumour volume doubling times for nodular basal cell carcinomas in the periocular versus non-periocular regions for the head and neck area were analysed, with no significant differences demonstrated. Further, comparison of basal cell carcinoma growth rates with other common solid tumours confirmed that basal cell carcinomas are slow growing malignancies.

Comparative Analyses of Tumour Volume Doubling Times for Periocular and Non-periocular Head and Neck Basal Cell Carcinomas