“…10 In addition to these limitations, the preparation of frozen sections requires a specialized laboratory set-up and a trained Mohs technician, raising the overall cost of the Mohs surgery and pathology procedure. 4 To overcome the limitations of the frozen sectioning process and provide rapid histopathological evaluation of ex vivo fresh tissue, several optical imaging techniques are being explored, such as confocal mosaicking microscopy, 9,[11][12][13][14][15] fluorescence polarization, 16 multiphoton laser scanning microscopy, 17 fluorescence lifetime imaging, 18 Raman spectroscopy, 19 integrated autofluorescence and Raman scattering microscopy, 20 optical coherence tomography (OCT), 21 full-field OCT, 22 coherent antiStokes Raman scattering microscopy, 23 multimodal spectral imaging, 24 and terahertz spectral imaging. 25,26 Confocal mosaicking microscopy (CMM) is currently the furthest advanced, being implemented and validated in Mohs surgical settings in real time.…”