Correlation of seborrheic keratosis
From dermoscopedia
Fissures and ridgeslines, curved and thick to describe the structural components of the pattern SK
Fissures and ridges describe multiple thick lines that resemble the gyri (ridges) and sulci (fissures) of the brain (Kittler et al., 2016; Malvehy et al., 2006). Histopathologically, they correspond to epidermal clefts filled with keratin (Minagawa, 2017).
Milia-like cystsThis glossary term has not yet been described.
Milia-like cysts are whitish or yellowish round structuresThis glossary term has not yet been described.. Under non-polarized dermoscopyThe examination of [skin lesions] with a 'dermatoscope'. This traditionally consists of a magnifier (typically x10), a non-polarised light source, a transparent plate and a liquid medium between the instrument and the skin, and allows inspection of skin lesions unobstructed by skin surface reflections. Modern dermatoscopes dispense with the use of liquid medium and instead use polarised light to cancel out skin surface reflections. these structures shine brightly (Braun et al., 2011). Histopathologically, they reveal intraepidermal keratin pseudocysts (Minagawa, 2017). Milia-like cysts are highly suggestive of SK, but can be observed in BCCAbbreviation for Basal Cell Carcinoma and papillomatous melanocyticThis glossary term has not yet been described. lesions, including melanomaThis glossary term has not yet been described. (Carrera et al., 2017).
Comedo-like openings[[Comedo like openings]] and cryptsKeratin filled invaginations that are larger than comedo- like openings Moth eaten border Border with concave or sharp punched-out invaginations
Comedo-like openings are dark (brown/black) round to oval invaginations. CryptsKeratin filled invaginations that are larger than comedo- like openings Moth eaten border Border with concave or sharp punched-out invaginations are similar, but more elongated and larger (Kittler et al., 2016a). Histologically, they reveal epidermal invaginations filled with keratin (Minagawa, 2017). They are associated with SKs, although can be seen in any papillomatous lesion, such as intradermal neviThis glossary term has not yet been described. and melanoma (Carrera et al., 2017).