Diagnostic accuracy of stereomicroscopy assessment of invasion depth in ex vivo specimens of early gastric cancer

Figure 4 Misdiagnosed case 1 stereomicroscopic overestimation (stereomicroscopy-submucosal vs pathology-T1a). A: White light imaging of the lesion; B: Stereomicroscopic overview of the formalin-fixed specimen (mucosal surface); C: Stereomicroscopic view of the specimen’s vertical (basal) margin, the central part of the lesion shows localized, non-transparent submucosal tissue with whitish discoloration (diameter > 5 mm), leading to an erroneous diagnosis of submucosal invasion (stereomicroscopy-submucosal). Final histopathology confirmed the lesion was confined to the mucosa (pT1a).