This is a reticular naevus with a regular pigment network that fades gradually towards the periphery. There is symmetry of colour and structures along two perpendicular axis as shown. Note also the central hyperpigmentation.

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This is a congenital melanocytic naevus with a characteristic globular pattern composed of large grey and small brown globules. Note the milia-like cysts (shiny white structures) which are sometimes seen in these benign lesions. There is symmetry of colour and structures.

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This is the characteristic starburst pattern of a pigmented Spitz (Reed) naevus. Note the regular radial arrangement of the streaks with a blue-black homogeneous centre. There is symmetry of colour and structures. These lesions should be excised in patients over the age of 14 years.

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This is a blue naevus with a homogeneous structureless blue colour. A history of a stable non changing lesion (as is the case here) should be elicited to make the diagnosis.

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This lesion has brown comedo-like openings ranging in size from large openings to small ones. There are also white shiny milia-like cysts. These are hallmark features of seborrhoeic keratosis. Notice the lack of pigment network signifying that the lesion is non-melanocytic.

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This is a compound melanocytic naevus with a structureless central area of hypopigmentation representing the elevated (palpable) dermal component of the naevus. The peripheral rim has a typical reticular pigment network that fades gradually represents the flat junctional component of the naevus. Note the symmetry of colour and structures. This type of naevus is often described as the ‘fried-egg’ pattern.

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This is a reticular melanocytic naevus on the areola with a prominent but regular pigment network. Note the symmetry of colour and structures.

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This is a haemangioma with characteristic sharply demarcated blue-purple globules of varying sizes known as lacunas

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There is brown pigmentation with hypopigmented areas (marked) corresponding to follicular openings resulting in a pseudonetwork. This together with a sharply demarcated border indicated by the yellow arrows (also known as the ‘jelly sign’) is a characteristic feature of solar lentigo.

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