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Items: 3

1.

Muir-Torré syndrome

Lynch syndrome, caused by a germline pathogenic variant in a mismatch repair gene and associated with tumors exhibiting microsatellite instability (MSI), is characterized by an increased risk for colon cancer and cancers of the endometrium, ovary, stomach, small intestine, hepatobiliary tract, urinary tract, brain, and skin. In individuals with Lynch syndrome the following life time risks for cancer are seen: 52%-82% for colorectal cancer (mean age at diagnosis 44-61 years); 25%-60% for endometrial cancer in women (mean age at diagnosis 48-62 years); 6% to 13% for gastric cancer (mean age at diagnosis 56 years); and 4%-12% for ovarian cancer (mean age at diagnosis 42.5 years; approximately 30% are diagnosed before age 40 years). The risk for other Lynch syndrome-related cancers is lower, though substantially increased over general population rates. [from GeneReviews]

MedGen UID:
231157
Concept ID:
C1321489
Neoplastic Process
2.

Mohr-Tranebjaerg syndrome

Males with deafness-dystonia-optic neuronopathy (DDON) syndrome have prelingual or postlingual sensorineural hearing impairment in early childhood, slowly progressive dystonia or ataxia in the teens, slowly progressive decreased visual acuity from optic atrophy beginning approximately age 20 years, and dementia beginning at approximately age 40 years. Psychiatric symptoms such as personality change and paranoia may appear in childhood and progress. The hearing impairment appears to be consistent in age of onset and progression, whereas the neurologic, visual, and neuropsychiatric signs vary in degree of severity and rate of progression. Females may have mild hearing impairment and focal dystonia. [from GeneReviews]

MedGen UID:
162903
Concept ID:
C0796074
Disease or Syndrome
3.

Epidermolysis bullosa simplex

Epidermolysis bullosa simplex (EBS) is characterized by fragility of the skin (and mucosal epithelia in some cases) that results in nonscarring blisters caused by little or no trauma. The current classification of epidermolysis bullosa (EB) includes two major types and 12 minor subtypes of EBS; all share the common feature of blistering above the dermal-epidermal junction at the ultrastructural level. The four most common subtypes of EBS are the focus of this GeneReview: EBS, localized (EBS-loc; previously known as Weber-Cockayne type). EBS, Dowling-Meara type (EBS-DM). EBS, other generalized (EBS, gen-nonDM; previously known as Koebner type). EBS-with mottled pigmentation (EBS-MP). The phenotypes for these subtypes range from relatively mild blistering of the hands and feet to more generalized blistering, which can be fatal. In EBS-loc, blisters are rarely present or minimal at birth and may occur on the knees and shins with crawling or on the feet at approximately age18 months; some individuals manifest the disease in adolescence or early adulthood. Blisters are usually confined to the hands and feet, but can occur anywhere if trauma is significant. In EBS, gen-non DM, blisters may be present at birth or develop within the first few months of life. Involvement is more widespread than in EBS-loc, but generally milder than in EBS-DM. In EBS-MP, skin fragility is evident at birth and clinically indistinguishable from EBS-DM; over time, progressive brown pigmentation interspersed with hypopigmented spots develops on the trunk and extremities, with the pigmentation disappearing in adult life. Focal palmar and plantar hyperkeratoses may occur. In EBS-DM, onset is usually at birth; severity varies greatly, both within and among families. Widespread and severe blistering and/or multiple grouped clumps of small blisters are typical and hemorrhagic blisters are common. Improvement occurs during mid- to late childhood. EBS-DM appears to improve with warmth in some individuals. Progressive hyperkeratosis of the palms and soles begins in childhood and may be the major complaint of affected individuals in adult life. Nail dystrophy and milia are common. Both hyper- and hypopigmentation can occur. Mucosal involvement in EBS-DM may interfere with feeding. Blistering can be severe enough to result in neonatal or infant death. [from GeneReviews]

MedGen UID:
86896
Concept ID:
C0079298
Disease or Syndrome
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