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Just as pigmented lesions on the skin can vary widely from freckles to lentigines to nevi to melanoma, similar pigmented lesions can be seen in nails. Melanonychia, brown or black pigmentation in the nail plate, can frequently present a diagnostic challenge for the dermatologist. While most causes of melanonychia are benign, it is important to…

Melanonychia is brown or black discolouration of a nail. It can be benign or malignant, and may be associated with various factors. See images of melanonychia and learn about its causes, complications and treatment.

Melanonychia is a nail pigmentation disorder that can be benign or malignant. See pictures of longitudinal and transverse melanonychia and learn about the possible causes and treatments.

Melanonychia is a brown or black color in your nail that can have many different causes. Learn about the types of melanonychia, how to diagnose it, and how it's treated depending on the cause.

See pictures of benign melanonychia, a common nail discoloration that is not harmful. Learn about the causes, diagnosis and treatment of melanonychia from DermNet, a trusted source of skin information.

Melanonychia is a dark line on your nail that can be benign or malignant. Learn about the types, causes, diagnosis, and treatment of melanonychia, and see pictures of different patterns and colors.

Etiology of melanonychia. 1. Melanocytic activation—Refers to increased melanin production from normal number of activated melanocytes in the nail matrix.[] It is also known as melanocyte stimulation and results from numerous causes listed in Figure 4. 2. Melanocyte proliferation—Means increased melanin pigment secondary to increased number of melanocytes in the nail matrix.[]

The nail plate is a semi-transparent keratinous structure and is not normally pigmented. It may appear discoloured because of pigment on top of the nail plate, within the nail plate or on top of the nail bed. Pigment may arise from the distal or proximal nail matrix. Longitudinal melanonychia is due to activation of melanocytes in the nail matrix.

Melanonychia Striata Longitudinalis (MSL): Pigmented bands… January 24, 2020. Melanonychia Striata Longitudinalis (MSL) is also referred to as pigmented bands. Melanonychia is a medical term used to describe black or brownish pigmentation involving the nail plate. MSL is a band of pigmentation that runs along the length-wise portion of the nail, along the nail bed.

Melanonychia is brown, gray, or black discoloration of the nail plate that can be caused by many conditions, ranging from benign to malignant. Learn about the epidemiology, etiology, diagnosis, and treatment of melanonychia and how to distinguish benign disease from more serious conditions.

Learn the differences between longitudinal melanonychia, a benign pigmented streak in the nail, and subungual melanoma, a rare but deadly form of skin cancer. See pictures of both conditions and their features, such as color, width, shape, and Hutchinson's sign.

Abstract. Melanonychia represents a brown to black discoloration of the nail plate that may be induced by benign or malignant causes. Two main mechanisms are involved in the appearance of melanonychias, i.e., melanocytic activation and melanocytic hyperplasia.

Melanonychia Striata. Melanonychia striata are gray, brown, or black lines in the nail plate caused by the normal brown skin pigment, melanin. In this image, a line is most noticeable in the nail of the left ring finger (arrow). Image provided by Chris G. Adigun, MD. In these topics.

Melanonychia is brown or black discolouration of a nail. See an image of melanonychia and learn more about its causes, types and treatment on DermNet NZ, a website for healthcare professionals and the public.

Most studies of nail unit melanoma show that even when a clinician biopsies melanonychia due to a clinical concern for melanoma, about 70% of these lesions are benign and therefore it is important that we use good surgical technique to obtain these specimens and give patients the best chance of healing with a highly functional nail afterward.

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Stern, who treats patients for a number of nail-related issues including cancer, infections and inflammatory diseases, believes there is a lack of public knowledge about nail melanoma, which can ...

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