Periocular basal cell carcinoma recurrence following surgical treatment: Safe surveillance time.

backgroundTo report the rate of primary periocular BCC recurrence following surgical excision in low-risk and high-risk BCCs, and to propose long term follow up guidelines.

methodsRetrospective case series of primary BCC treated with surgical excision (Mohs micrographic surgery [MMS], wide local excision [WLE] or fast paraffin excision) who have histologically-confirmed BCC subtype and histologically-measured tumour clearance margins.

results77 patients (78 eyelids) were included. Mean age was 72.0 ± 12.8 years with a female predominance (42, 54.5%). Most common histological BCC subtype was nodular (39, 50.0%). 44 (56.47.1%) patients underwent MMS. Tumour clearance was achieved in 59 (75.6%) eyelids after one surgery. 9 had further surgery to achieve tumour clearance while 10 were monitored. There was no statistical significance between recurrence rates in patients who had tumour clearance compared with patients with incomplete tumour clearance after initial surgery (p = 0.15). In patients with incomplete tumour clearance, there was no statistical significance between recurrence rates in those who underwent further surgery versus those monitored (p = 0.47). Average follow-up duration was 37.9 ± 17.2 months. Three (3.9%) cases had recurrent BCC. All three cases had high-risk BCC features (infiltrative subtypes and/or incomplete tumour excision after initial surgery).

conclusionsThere was no evidence of recurrence of completely excised, low-risk BCCs at three years, regardless of type of surgical excision. We recommend patients with completely excised, primary BCCs without high-risk features be monitored for one year. Patients with any high-risk BCC features, such as incompletely excised tumours or high-risk histological subtypes, should be monitored for five years.