koweb

liquid-filled (generally serous) lesion, more than 5mm across, located at varying depths of the epithelial-connective tissues (intra-epithelial, sub-dermal or sub-mucosal)

a well-defined or widespread reddening, caused by hyperemia, atrophy, phlogosis or vascular water retention

a loss in the substance of superficial epithelial strata, tending to heal spontaneously (eliminating the causative agent). The bottom part can be red in colour due to the exposure of underlying connective tissue or yellow due to fibrin deposits

a well-defined chromatic variation of normal mucosa, without elevation or depression, and haematic or caused by an accumulation of pigments, less than 5mm across )

a well-defined chromatic variation of normal mucosa, without elevation or depression, and haematic or caused by an accumulation of pigments, greater than 5mm across

a formation of totally new tissue, following a benign or malignant proliferation of groups of cells

a lesion raised from the epithelium, less than 5mm across

a compact lesion raised from the epithelium, more than 5mm across. It can result from the confluence of different elementary lesions, such as papules

an increase in the tissue volume or the volume of an organ

a loss in epithelial strata, extending to sub-epithelial connective tissue. Compared to erosion, an ulcer does not typically heal spontaneously and its borders and basement are more easily distinguishable. The latter can be flattened, like a bowl, crater or raised, comprising necrotised or granular tissue