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Lentigo maligna is a histopathological variant of melanoma in situ. [6] Lentigo maligna is sometimes classified as a very early melanoma, [7] and sometimes as a precursor to melanoma. [8] When malignant melanocytes from a lentigo maligna have invaded below the epidermis, the condition is termed lentigo maligna melanoma. [2]
A lentigo (/ l ɛ n ˈ t aɪ ɡ oʊ /) (plural lentigines, / l ɛ n ˈ t ɪ dʒ ɪ n iː z /) is a small pigmented spot on the skin with a clearly defined edge, surrounded by normal-appearing skin. It is a harmless (benign) hyperplasia of melanocytes which is linear in its spread.
Lentigo maligna is the non-invasive skin growth that some pathologists consider to be a melanoma-in-situ. [3] A few pathologists do not consider lentigo maligna to be a melanoma at all, but a precursor to melanomas. Once a lentigo maligna becomes a lentigo maligna melanoma, it is treated as if it were an invasive melanoma.
Other benign skin lesions that may mimic acral lentiginous melanoma include: Lentigo (sun spots), Acral Nevi (moles), or Onychomycosis (fungal infection of the nail). These skin lesions can appear as dark brown spots, like ALM, but can be distinguished on close examination or dermatoscopy. [7]
Lentigo maligna is sometimes classified as a very early melanoma, [86] and sometimes a precursor to melanoma. [ 87 ] Superficial spreading melanomas and acral lentiginous melanomas can be either in situ or invasive, [ 88 ] but acral lentiginous melanomas are almost always invasive.
Lentigo in cats is a common dermatological condition characterized by the presence of small, flat, brownish spots on the skin — particularly around the lips, nose, and eyelid margins. Unlike in ...
Benign melanocytic nevus; Other names: Banal nevus, Common acquired melanocytic nevus, Mole, Nevocellular nevus, and Nevocytic nevus. Seen is a normal mole, with no difference in shades of brown, black, or tan.
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