Disease or Syndrome
LEOPARD syndrome
[ lep-erd sin-drohm, -druhm ]
Subclass of:
Multiple congenital anomalies;
Craniofacial Abnormalities;
Pulmonary Valve Stenosis;
Congenital Heart Defects;
Lentigo
Definitions related to leopard syndrome:
-
A genetic syndrome caused by mutation(s) in the PTPN11, RAF1, or the BRAF genes, encoding tyrosine-protein phosphatase non-receptor type 11 and RAF proto-oncogene serine/threonine-protein kinase, and serine/threonine-protein kinase B-raf, respectively. Affected male individuals may exhibit unilateral or bilateral cryptorchidism, small penis, and/or hypospadias (urinary meatus on the dorsal side of the penis). Affected female individuals may have ovarian hypoplasia or agenesis. Primary hypogonadism in both female and male individuals may result in delayed puberty.NICHD Pediatric TerminologyU.S. National Cancer Institute, 2021
-
A genetic syndrome caused by mutations in the PTPN11 and RAF1 genes. It is characterized by the following abnormalities: multiple lentigines, electrocardiographic conduction abnormalities, ocular hypertelorism, pulmonary stenosis, abnormalities in genitalia, growth retardation, and deafness.NCI ThesaurusU.S. National Cancer Institute, 2021
-
An autosomal dominant disorder with an acronym of its seven features (LENTIGO; ELECTROCARDIOGRAM abnormalities; ocular HYPERTELORISM; PULMONARY STENOSIS; abnormal genitalia; retardation of growth; and DEAFNESS or SENSORINEURAL HEARING LOSS). This syndrome is caused by mutations of PTPN11 gene encoding the non-receptor PROTEIN TYROSINE PHOSPHATASE, type 11, and is an allelic to NOONAN SYNDROME. Features of LEOPARD syndrome overlap with those of NEUROFIBROMATOSIS 1 which is caused by mutations in the NEUROFIBROMATOSIS 1 GENES.NLM Medical Subject HeadingsU.S. National Library of Medicine, 2021
-
Noonan syndrome with multiple lentigines (NSML) is a condition in which the cardinal features consist of lentigines, hypertrophic cardiomyopathy, short stature, pectus deformity, and dysmorphic facial features, including widely spaced eyes and ptosis. Multiple lentigines present as dispersed flat, black-brown macules, mostly on the face, neck and upper part of the trunk with sparing of the mucosa. In general, lentigines do not appear until age four to five years but then increase to the thousands by puberty. Some individuals with NSML do not exhibit lentigines. Approximately 85% of affected individuals have heart defects, including hypertrophic cardiomyopathy (HCM) (typically appearing during infancy and sometimes progressive) and pulmonary valve stenosis. Postnatal growth retardation resulting in short stature occurs in fewer than 50% of affected persons, although most affected individuals have a height that is less than the 25th percentile for age. Sensorineural hearing deficits, present in approximately 20%, are poorly characterized. Intellectual disability, typically mild, is observed in approximately 30% of persons with NSML.GeneReviewsUniversity of Washington, 2021
-
LEOPARD syndrome is a complex dysmorphogenetic disorder of variable penetrance and expressivity. Gorlin et al introduced the acronym LEOPARD as the name of the syndrome in 1969 to recall the main features of the disorder, as follows: Lentigines (multiple) as shown below Electrocardiographic conduction abnormalities Ocular hypertelo...WebMD, 2019
-
LEOPARD syndrome is an inherited condition characterized by abnormalities of the skin, heart, inner ears, and genitalia. The acronym LEOPARD describes the features of the syndrome: (L)entigines - dark spots on the skin (E)lectrocardiographic conduction defects - abnormalities of the electrical activity of the heart (O)cular hypertelorism...National Center for Advancing Translational Sciences
Return to OpenMD Medical Dictionary
> L
This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.