Congenital generalized lipodystrophy type 2
Berardinelli-Seip syndrome 2

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Prevalence of clinical parameters (%)

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Pubmed id number as a reference Organ system affected
Number of patients in the reference Percent affected patients (Between 0 and 1, eg. 0.1 = 10%)
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List of symptoms

Symptom/sign Organ system Percent affected Pubmed id Added on(yyyy-mm-dd) Edit/add reference
Hepatomegaly digestive 100 % 12362029 2014-05-29
Lipodystrophy integumentary 100 % 12362029 2014-05-29
Muscle hypertrophy skeletal 100 % 12362029 2014-05-29
Hypertriglyceridemia circulatory 100 % 12362029 2014-05-29
Mental retardation nervous 75 % 12362029 2014-05-29
Diabetes mellitus type 2 endocrine 46 % 12362029 2014-05-29
Hypertrophic cardiomyopathy skeletal 33 % 12362029 2014-05-29
Bone cysts skeletal 8 % 12362029 2014-05-29

List of references:

Genotype-phenotype relationships in Berardinelli-Seip congenital lipodystrophy.
L Van Maldergem, J Magré, T E Khallouf, T Gedde-Dahl, M Delépine, O Trygstad, E Seemanova, T Stephenson, C S Albott, F Bonnici, V R Panz, J L Medina, P Bogalho, F Huet, S Savasta, A Verloes, J J Robert, H Loret, M De Kerdanet, N Tubiana-Rufi, A Mégarbané, J Maassen, M Polak, D Lacombe, C R Kahn, E L Silveira, F H D'Abronzo, F Grigorescu, M Lathrop, J Capeau, S O'Rahilly,

Generalised lipodystrophy of the Berardinelli-Seip type (BSCL) is a rare autosomal recessive human disorder with severe adverse metabolic consequences. A gene on chromosome 9 (BSCL1) has recently been identified, predominantly in African-American families. More recently, mutations in a previously undescribed gene of unknown function (BSCL2) on chromosome 11, termed seipin, have been found to be responsible for this disorder in a number of European and Middle Eastern families. We have studied the genotype/phenotype relationships in 70 affected subjects from 44 apparently unrelated pedigrees of diverse ethnic origin. In all subjects, hepatic dysfunction, hyperlipidaemia, diabetes mellitus, and hypertrophic cardiomyopathy were significant contributors to morbidity with no clear differences in their prevalence between subjects with BSCL1 or BSCL2 and those with evidence against cosegregation with either chromosome 9 or 11 (designated BSCLX). BSCL2 appears to be a more severe disorder than BSCL1 with a higher incidence of premature death and a lower prevalence of partial and/or delayed onset of lipodystrophy. Notably, subjects with BSCL2 had a significantly higher prevalence of intellectual impairment than those with BSCL1 or BSCLX (p<0.0001, OR 17.0, CI 3.6 to 79.0). The higher prevalence of intellectual impairment and the increased risk of premature death in BSCL2 compared to BSCL1 emphasise the importance of molecular diagnosis of this syndrome and have clear implications for genetic counselling.

Journal of medical genetics - Oct 2002