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Unna naevus is a papillomatous dermal naevus that is in the shape of a raspberry. It is one of the many kinds of congenital and acquired melanocytic naevi (moles) that can affect the skin. Learn more about its features, causes, diagnosis and treatment.
The decisive discriminative feature between Unna's and Miescher's nevi is that Unna's nevus is an almost purely adventitial lesion confined to expanded papillary dermis and, many times, to the perifollicular dermis too. In Miescher's nevus melanocytes diffusely infiltrate both adventitial and reticular dermis in a wedge-shaped pattern.
- Evaristo Sánchez Yus, Marta del Cerro, Raquel S Simón, Marta Herrera, María Rueda
- 2007
The Unna nevus is a type of dermal nevus that occurs below the neck, whereas the Miescher nevus occurs on the face. To understand the Unna nevus, keep in mind that a mole (nevus or naevus) is a benign ‘nest’ of pigmented skin cells called melanocytes. The ‘nests’ of an unna nevus are found down in the dermal layer of skin. As a result ...
The decisive discriminative feature between Unna's and Miescher's nevi is that Unna's nevus is an almost purely adventitial lesion confined to expanded papillary dermis and, many times, to the perifollicular dermis too. In Miescher's nevus melanocytes diffusely infiltrate both adventitial and reticular dermis in a wedge-shaped pattern.
Unna nevus is a rare, flat, brown or black macule that occurs on the lower leg. It is one of the acquired melanocytic naevi that may be associated with other skin conditions such as neurofibromatosis or vitiligo.
Apr 21, 2022 · Unna nevus is a papillomatous MN located mostly on the neck, the axillae, and the inguinal area. Clinical differentiation from seborrheic keratosis or fibroma pendulans (“skin tags”) is sometimes difficult. Pigmentation varies from virtually skin‐colored to deeply pigmented.
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What is Unna nevus?
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May 31, 2018 · Unna nevus is a type of mole that resembles a raspberry. It’s usually soft, brownish, and located on your trunk, arms, or neck. Learn how to identify it and when to see a doctor.
