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  2. Melanocytic tumors of uncertain malignant potential - Wikipedia

    en.wikipedia.org/wiki/Melanocytic_tumors_of...

    Several lesion types may be classified as MELTUMPs: these include atypical melanocytic proliferations with features that may overlap with atypical Spitz naevi/tumors, dysplastic naevi, pigmented epithelioid melanocytoma, deep penetrating naevi, congenital naevi, cellular nodules in congenital naevi, possible naevoid melanomas, and cellular blue ...

  3. Acral lentiginous melanoma - Wikipedia

    en.wikipedia.org/wiki/Acral_lentiginous_melanoma

    Acral lentiginous melanoma (ALM) The main characteristic of acral lentiginous melanoma is continuous proliferation of atypical melanocytes at the dermoepidermal junction. [23] Other histological signs of acral lentiginous melanoma include dermal invasion and desmoplasia. [24] This invasion usually occurs many years after the initial lesion ...

  4. Dysplastic nevus - Wikipedia

    en.wikipedia.org/wiki/Dysplastic_nevus

    Most dermatologists and dermatopathologists use a system devised by the NIH for classifying melanocytic lesions. In this classification, a nevus can be defined as benign, having atypia, or being a melanoma. A benign nevus is read as (or understood as) having no cytologic or architectural atypia. An atypical mole is read as having architectural ...

  5. Dysplastic nevus syndrome - Wikipedia

    en.wikipedia.org/wiki/Dysplastic_nevus_syndrome

    The features include: 1) two or more clinically atypical nevi, 2) more than 100 nevi in patients between 20 and 50 years of age, 3) more than 50 nevi in patients under 20 years of age or more than 50 years of age, 4) more than one nevus in buttocks or instep, 5) nevi on the anterior scalp, 6) one or more pigmented lesions in the iris.

  6. Melanocytic nevus - Wikipedia

    en.wikipedia.org/wiki/Melanocytic_nevus

    If the lesion is suspected to be skin cancer, a skin biopsy must be done before considering removal. This is unless an excisional biopsy is warranted. If the lesion is a melanocytic nevus, one has to decide if it is medically indicated or not. Other reasons for removal may be cosmetic or because a raised mole interferes with daily life (e.g ...

  7. Lentigo maligna - Wikipedia

    en.wikipedia.org/wiki/Lentigo_maligna

    It is difficult to distinguish these lesions with the naked eye alone, and even with some difficulty using dermatoscopy. As the lentigo maligna is often very large, it often merges with, or encompasses other skin tumors – such as lentigines, melanocytic nevi, and seborrheic keratosis. Second dilemma is the biopsy technique.

  8. Melanocytic tumor - Wikipedia

    en.wikipedia.org/wiki/Melanocytic_tumor

    Melanocytic tumors are tumors developed from melanocytes. [1] [2] Types. Melanocytic nevus; Melanocytic tumors of uncertain malignant potential; Melanoma; References

  9. Lentigo - Wikipedia

    en.wikipedia.org/wiki/Lentigo

    Lentigines are distinguished from freckles (ephelis) based on the proliferation of melanocytes. Freckles have a relatively normal number of melanocytes but an increased amount of melanin. A lentigo has an increased number of melanocytes. Freckles will increase in number and darkness with sunlight exposure, whereas lentigines will stay stable in ...