Basal cell carcinoma (BCC) are the most frequent skin cancers. Their incidence is constantly increasing. BCC diagnosis is first clinically suspected and then confirmed following histological examination of either a skin biopsy or the excisional specimen. Surgery is the first-line treatment and some procedures (notably Mohs surgery) require extemporaneous histological analysis of the edges to ensure a complete excision. Such on-site histopathological examination can be time consuming and associated with decreased sensitivity. Skin imaging techniques have already been tested to overcome these limitations and seem promising. Although some of them - such as confocal microscopy - are already even used in vivo, there is to date no report of the use of full-field optical coherence tomography for the diagnosis of BCC.

The DOCTOBA study intends to describe direct histopathological examination of fresh skin biopsy or excisional specimen with dynamic full-field optical coherence tomography.

Inclusion Criteria:

- patient > 18 years of age who received skin biopsy or excision of basal cell carcinoma suspected lesion between start study date and primary completion date

Exclusion Criteria:

• inability to perform dynamic full-field optical coherence tomography observation at the moment of skin biopsy
• diagnosis of basal cell carcinoma disproved

patient > 18 years of age who received skin biopsy or excision of basal cell carcinoma suspected lesion