Line‐field confocal optical coherence tomography of seborrheic keratosis: A case series

Dear Editor, Linefield confocal optical coherence tomography (LCOCT) is a recently developed noninvasive imaging technique featuring 1.3μm lateral and 1.1μm axial resolution,1 therefore, combining the high penetration depth of conventional OCT with the high isotropic resolution of reflectance confocal microscopy. In addition, its ability to acquire images both in the vertical and horizontal planes allows tridimensional reconstructions of the skin in real time. Thanks to these technical characteristics, LCOCT can be a true asset for the examination of physiological skin,2 as well as for the analysis and diagnosis of skin lesions.3– 8 Seborrheic keratosis (SK) is one of the most common benign lesions encountered in daily practice, especially in the elderly population. Although its clinical and dermoscopic diagnosis is often easy to make, it may be sometimes tricky to rule out the possibility of its malignant lookalikes, such as melanoma, basal and squamous cell carcinomas (BCC and SCC).9 We believe that LCOCT could be of significant utility in these situations: thanks to its ability to examine skin Received: 8 August 2022 | Accepted: 15 March 2023