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Legius syndrome (LS) is an autosomal dominant condition characterized by cafe au lait spots. [3] It was first described in 2007 and is often mistaken for neurofibromatosis type I. It is caused by mutations in the SPRED1 gene. [5] [6] It is also known as neurofibromatosis type 1-like syndrome. [1]
Having six or more café au lait spots greater than 5 mm in diameter before puberty, or greater than 15 mm in diameter after puberty, is a diagnostic feature of neurofibromatosis type I (NF-1), but other features are required to diagnose NF-1. [2] Familial multiple cafe-au-lait spots have been observed without an NF-1 diagnosis. [9] Noonan syndrome
Neurofibromatosis type I is the most common of the three types and is caused by genetic changes in the NF1 gene located on chromosome 17 (17q11.2). This gene encodes a cytoplasmic protein known the neurofibromin, which functions as a tumor suppressor and therefore serves as a signal regulator of cell proliferation and differentiation.
Café au lait spot characteristic of NF1 Diagnostic criteria of neurofibromatosis type I, requiring at least 2 of the mentioned items. [6]The following is a list of conditions and complications associated with NF-1, and, where available, age range of onset and progressive development, occurrence percentage of NF-1 population, method of earliest diagnosis, and treatments and related medical ...
It was first discovered when Riccardi et al. described multiple families with cafe-au-lait spots and no association for neurofibromatosis in 1980. [5]In 1993, Charrow et al. described five members from a four-generation family who had the characteristic tell-tale sign of neurofibromatosis, multiple cafe au lait spots; however, testing of the gene usually involved in neurofibromatosis revealed ...
Conditions associated with the development of café au lait macules Condition Ataxia–telangiectasia: Bloom syndrome: Fanconi anaemia: Gaucher's disease: Legius syndrome: Marfan syndrome: McCune–Albright syndrome: Multiple endocrine neoplasia type 1: Neurofibromatosis type 1: Neurofibromatosis type 1-like syndrome: Noonan syndrome: Peutz ...
In most instances, neurofibromatosis type 1 can be diagnosed clinically according to consensus criteria and genetic testing is only used in atypical presentations or for family planning decisions. [11] Café au lait spots are one of the most characteristic features of neurofibromatosis type 1. They are hyperpigmented lesions of the skin that ...
Café au lait spot macules may occur anywhere on the body. They are most commonly oval in shape and light brown, or milk coffee, in color. These birthmarks may be present at birth, or appear in early childhood, and do not fade much with age. [4] One or two on an individual is common; [4] however, four or more may be an indicator of ...
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