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Lentigo maligna is a precursor to lentigo maligna melanoma, a potentially serious form of skin cancer. Lentigo maligna is also known as Hutchinson melanotic freckle. Lentigo maligna is an early form of melanoma in which the malignant cells are confined to the tissue of origin, the epidermis, hence it is often reported as ‘in situ’ melanoma.
Lentigo maligna is a type of melanoma in situ and is a precursor to lentigo maligna melanoma, a potentially serious form of skin cancer. Lentigo maligna is also known as Hutchinson melanotic freckle. Lentigo maligna occurs in sun-damaged skin so is generally found on the bald scalp, face or neck, particularly the nose and cheek of older adults.
Lentiginous melanoma has been more common in males than females in most reports. The majority of patients with lentigo maligna are older than 40 years, and the peak age of diagnosis is be between 60 and 80 years. Unlike superficial spreading melanoma, lentigo maligna is not related to the number of melanocytic naevi or atypical naevi.
Lentigo maligna is a special type of melanoma in situ arising on sun damaged sites. The dermoscopic features of lentigo maligna are characterised by: Thick pigmented lines around appendageal openings, sometimes called rhomboidal structures. Asymmetric pigmented follicular openings. Slate grey dots and globules.
Lentigo maligna melanoma, Breslow 0.8 mm. Pseudonetwork, structureless areas, grey and concentric circles seen in dermoscopy of lentigo maligna melanoma. Go to the lentigo maligna and lentigo maligna melanoma topic page. ADVERTISEMENT. View pictures of lentigo maligna and lentigo maligna melanoma in the gallery below.
Superficial spreading melanoma is due to the development of malignant pigment cells (melanocytes) along the basal layer of the epidermis. The majority arise in previously normal-appearing skin. About 25% develop within an existing melanocytic naevus, which can be a normal common naevus, an atypical or dysplastic naevus, or a congenital naevus.
Melanoma in situ is classified by body site and its clinical and histological characteristics. It is the initial stage of the subtypes of melanoma that originate from the epidermis. The most common subtypes are: Lentigo maligna; Lentiginous melanoma in situ; Superficial spreading melanoma in situ. Rare forms of melanoma that may have an in-situ ...
Lentigo maligna. Lentigo maligna (LM, Hutchinson's freckle, 5–15% cases) is a common pigmented lesion on the exposed skin of the older patient and is melanoma in situ arising in sun-damaged skin (face or neck). Complete surgical excision is recommended but not always practical. In some very elderly patients, careful observation is acceptable.
Melanoma of the nail unit most often starts as a narrow brown to black pigmented band, visible on the length of a single nail plate (melanonychia). It is most prevalent in the nail of the thumb or big toe. It is not easy to differentiate from a benign lentigo or naevus (mole) in its early stages.
Acral lentiginous melanoma (ALM) is a rare subtype of melanoma arising on the palms, soles, or under the nails. It is also known as acral melanoma. In early stages, ALM often appears as a dark brown or black macule with variegated colour, and can be nodular and ulcerated in advanced cases. ALM is slow-growing, and can take months to years to ...