What are melanocytic nests?

Nests of melanocytes are confined to the dermis. Melanocytes may show ‘pseudo-inclusions’, which are invaginations of cytoplasm into the nucleus giving the appearance of nuclear inclusions or cells with multiple nuclei. Deeper, the naevus cells may become spindle-shaped or ‘neurotised’.

What is atypical melanocytic?

Atypical Melanocytic lesions are irregular moles and skin spots that require further examination. The five visual characteristics used to identify an atypical melanocytic lesion are the same as the characteristics used to identify signs of invasive melanoma. These are called the ABCDE’s of melanoma.

Is atypical melanocytic proliferation serious?

Atypical melanocytic lesions, which are also called atypical moles or atypical melanocytic hyperlasias, are pigmented moles that contain abnormal cells. These moles are usually benign. However, in some cases, atypical melanocytic lesions can become melanomas.

What does dysplastic nevi look like?

A dysplastic nevus can have a mixture of several colors, from pink to dark brown. Usually, it is flat with a smooth, slightly scaly, or pebbly surface, and it has an irregular edge that may fade into the surrounding skin.

What is mild melanocytic atypia?

Mild Cytological Atypia 1, A–B) The nuclei of the melanocytes were condensed, ovoid-to-ellipsoidal in shape, hyperchromatic, indented, and often without a visible nucleolus, or with a very small one. There was considerable variability in nuclear shape.

What does atypical compound melanocytic proliferation mean?

Atypical intraepidermal melanocytic proliferation (AIMP) is a descriptive histopathologic term commonly used in these cases to denote morphology sharing some features with melanoma but failing to meet criteria of a definitive benign or malignant diagnosis.

What is mild atypical melanocytic hyperplasia?

Atypical junctional melanocytic hyperplasia (AJMH) is a poorly defined clinical entity. For most dermatologists, it represents a melanocytic proliferation that insufficient for a definitive diagnosis of melanoma in situ. However, treatment guidelines for AJMH are not well defined.

What are atypical melanocytic lesions?

Atypical melanocytic lesions are pigmented moles that have been found to have abnormal cells and are assumed to be at risk for developing into a malignant melanoma. These lesions, once diagnosed as atypical, are typically excised to eliminate the risk of cancer.

What is an atypical melanocytic naevus?

An atypical melanocytic naevus is a mole with unusual features. “Atypical melanocytic naevus” is often shortened to “atypical naevus”. Older names for atypical melanocytic naevus include Clark naevus and B-K mole.

What is superficial atypical melanocytic Prol proliferation of unknown significance?

Some pathologists use the term Superficial Atypical Melanocytic Proliferation of Unknown Significance or SAMPUS to describe dysplastic melanocytic lesions in which it is difficult to exclude melanoma in situ or radial growth phase invasive melanoma. SAMPUS is often applied when a conclusive diagnosis cannot be reached.

What are atypical melanocytic lesions of the thigh with Spitzoid and dysplastic features?

Atypical melanocytic lesions of the thigh with spitzoid and dysplastic features: a clinicopathologic study of 29 cases. Ann Diagn Pathol2013;17:265–9. [PubMed] [Google Scholar] 55. Abraham RM, Ming ME, Elder DE, Xu X. An atypical melanocytic lesion without genomic abnormalities shows locoregional metastasis.