Lentigo maligna and lentigo maligna melanoma - DermNet
2020年8月10日 · 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 and lentigo maligna melanoma dermoscopy
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.
Dermoscopy. Malignant melanoma
Lentigo maligna. 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
Common skin lesions. Melanoma - DermNet
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.
Lentiginous melanoma - DermNet
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 and Maligna Melanoma Images — DermNet
Lentigo maligna is a precursor to lentigo maligna melanoma, a potentially serious form of skin cancer. View pictures of lentigo maligna and lentigo maligna melanoma in the gallery below. Search DermNet Ctrl K
Concentric circles dermoscopy
Concentric circles are a specific clue to melanoma on the face (lentigo maligna), but the clue has poor sensitivity as they are rarely present. In a study by Tschandl et al, concentric circles were only found in 4.2% of flat facial melanomas, usually larger lesions [1].
Lentigo: Causes, Features, and Treatment — DermNet
A lentigo is a pigmented flat or slightly raised lesion with a clearly defined edge. Unlike an ephelis (freckle), it does not fade in the winter months. There are several kinds of lentigo. The name lentigo originally referred to its appearance resembling a small lentil. The plural of lentigo is lentigines, although “ lentigos ” is also in ...
Lentigo pathology - DermNet
Histologically, the hallmark of the lentigo (plural lentigines) is an increase in basal melanin. In most forms of lentigo, there is a mildly increased number of melanocytes in the basal layer of the epidermis and variable elongation of the rete ridges. Lentigo simplex. Lentigo simplex is a common lesion and usually appears in
Melanoma in situ - DermNet
It is thought that less than 5% of lentigo maligna and lentiginous melanoma transform into invasive melanoma. The risk of melanoma in situ evolving into invasive melanoma over time is greater in superficial spreading melanoma, acral lentiginous melanoma and other forms of melanoma, but the exact risk is unknown.