A solar lentigo showing perifollicular hypopigmentation to form a regular brown pseudonetwork, characterised by sharp demarcation at the periphery (the jelly sign).

Main Menu

This is an acral melanoma characterised by pigmented parallel lines located on the ridges (parallel-ridge pattern). Note that the ridges are thicker than the furrows. The eccrine duct openings are seen in the ridges. Brown-grey globules centrally signify that this is an invasive melanoma.

Main Menu

This is a lentigo maligna melanoma (melanoma in-situ) with a grey pseudonetwork made up of rhomboidal structures due to asymmetrical pigmentation of follicular openings.

Main Menu

This is a melanoma. The most striking feature is the large area of regression composed of blue pepper-like granules over a white scar-like background, corresponding histopathologically to melanophages and fibrosis, respectively.

Main Menu

Two naevus cell populations are seen in this lesion. There is the blue naevus component seen as structureless blue pigmentation centrally and a globular-congenital naevus component peripherally. This is an example of a combined naevus.

Main Menu

This is an amelanotic melanoma, showing the typical pink - milky red colour. Polymorphous vessels which include scattered dotted, linear-irregular and hairpin vessels are seen. In addition, white orthogonal lines representing chrysalis structures are seen in the upper part of the lesion indicated by the white arrows.

Main Menu

In this melanoma, remnants of a pigment network with asymmetrically distributed peripheral globules (a sign of growth) and blue white structures are seen. Centrally there are few black dots in a rather structureless brown area.

Main Menu

This lesion appears “spitzoid” due to predominant presence of regularly distributed dotted vessels surrounded by a reticular depigmentation (negative pigment network). In the central area some linear irregular vessels can be seen. The diagnosis of a melanocytic lesion is facilitated by the presence of brown pigmentation. The diagnosis is spitzoid melanoma.

Main Menu

Under the dermatoscope, junctional naevi have a symmetric pigment network with thin lines and with holes of fairly regular size. They are typically tan or brown in colour and the edge fades away gradually into the surrounding skin.

Main Menu