This is a superficial spreading melanoma of Breslow’s thickness 0.6mm. The lesion has an atypical pigment network, streaks and irregular globules. These are features of a multi component pattern.

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There is asymmetric pigmentation of follicular openings producing a faint pseudonetwork which is seen as rhomboidal structures. There is also blue-grey peppering suggestive of regression. This is a non-facial lentigo maligna which as seen here can sometimes have patterns similar to those seen in facial lentigo maligna.

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These are features of a typical pigmented basal cell carcinoma. Aggregations of grey pigment with peppering is sometimes seen in BCCs as shown here.

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There are remnants of an atypical pigment network with thick broadened lines and dotted vessels. This is a melanoma of Breslow’s thickness 0.3mm.

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This is Bowen’s disease (syn. Intraepidermal carcinoma or SCC in-situ) showing aggregated glomerular vessels and scales.

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The presence of a pigment network allows classification of this lesion as melanocytic. A typical reticular pigment network is present. The network in area B is darker but on close inspection the lines of the network are not wider than the diameter of the ‘holes’ in the network. The lesion was reported as a Clark/dysplastic naevus in view of this asymmetry in colour and pattern.

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This is a multicomponent pattern showing asymmetrically distributed aggregated brown globules, dotted vessels and homogeneous strutureless white and brown areas. These features are suggestive of melanoma. The lesion was reported as a dysplastic compound naevus.

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This is a haemangioma with red-blue lacunas

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There is an atypical pigment network (thickened pigment lines) together with asymmetry of colour. This is a melanoma in-situ.

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