longitudinal melanonychia - Health Topics
Please provide your email address to receive an email when new articles are posted on . Pediatric longitudinal melanonychia should be treated differently from longitudinal melanonychia in adults, as ... Despite a high frequency of atypical features, longitudinal melanonychia (LM) in children is associated with an exceedingly low rate of malignancy.
Understanding the Context
LM — a pigmented band in the nail plate caused by ... Longitudinal melanonychia is the occurrence of tan, brown, or black pigmented bands along the length of the nail bed. It occurs most often in dark-skinned individuals, and it affects girls more often ... Nature: Clinical Differences between Hutchinson’s sign in Subungual Melanoma and Pseudo-Hutchinson’s sign in Benign Longitudinal Melanonychia Clinical Differences between Hutchinson’s sign in Subungual Melanoma and Pseudo-Hutchinson’s sign in Benign Longitudinal Melanonychia Longitudinal melanonychia is due to activation of melanocytes in the nail matrix.
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It is more common in darker skinned individuals and may affect one or several nails. The band may occasionally extend across the entire nail (total melanonychia). Transverse melanonychia is rare. There are various causes of longitudinal melanonychia. Melanoma of the nail unit arises in people of all skin colour and race.
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It is important to note that while longitudinal melanonychia only occurs in around 1% of white-skinned individuals, it is very common in dark-skinned races, occurring in an estimated 100% of African-Americans by the age of 50 and around 20% of Asians. Longitudinal melanonychia may be of racial origin, Laugier-Hunziker syndrome. Rarely due to drug (azidothymidine, tetracycline), endocrine disorders or Peutz-Jeghers syndrome. Onychopapilloma usually results in a longitudinal streak in a red nail (erythronychia), which extends from the lunula to the tip of the nail. White longitudinal streaks (leukonychia) or brown longitudinal streaks (melanonychia) may also occur. The distal tip of the nail may split or lift (onycholysis).
To find out the cause of a longitudinal melanonychia (a pigment band in the nail plate), which may be due to a benign pigmented lesion or to melanoma of the nail unit To make a diagnosis of squamous cell carcinoma or squamous cell carcinoma in situ To diagnose other nail disorders. How is a nail biopsy done? Laugier-Hunziker syndrome Longitudinal melanonychia in Laugier-Hunziker syndrome (LHS-patient1) Keywords: Female, Hereditary pigmentary disorder, Homogeneous longitudinal melanonychia, Idiopathic lenticular mucocutaneous pigmentation, Nail plate pigmentation, Pseudo-hutchinson sign What is melanonychia? Melanonychia is brown or black discolouration of a nail.