Bardet-Biedl syndrome with end-stage kidney disease in a four-year-old Romanian boy: a case report

Laurence-Moon-Bardet Biedl Syndrome With Cholelithiasis

Laurence-Moon-Bardet Biedl syndrome (LMBBS) is a rare autosomal recessive genetic disorder that is most frequently found in children born from consanguineous marriages. The most prominent clinical characteristics of this syndrome include rod and cone dystrophy, nystagmus, central obesity, polydactyly, hypogonadism in males, renal anomalies, developmental delay, ataxia, speech difficulties, and poor coordination. In this report, we describe the case of a 31-year-old male who had the classical clinical features of LMBBS like developmental delay, retinitis pigmentosa, nystagmus, obesity, hypogonadism, and central obesity, presenting with abdominal pain associated with vomiting and tenderness in the right lower quadrant. The patient was diagnosed with cholelithiasis. This case report emphasizes the atypical complication of cholelithiasis due to the underlying syndrome and the need for further research in this area.

A Unique Manifestation of Bardet-Biedl Syndrome with Otolaryngologic Symptoms and Bronchopneumonia in a One-year-old Girl

Bardet-Biedl syndrome (BBS) is a rare autosomal recessive genetic disorder. It is a congenital ciliopathy that has primary and secondary characteristics. Primary clinical features include rod-cone dystrophy, polydactyly, central obesity, genital abnormalities and mental retardation often presenting as learning difficulties. Secondary clinical features include developmental delay, speech deficit, brachydactyly/syndactyly, dental defects, ataxia, olfactory deficit, diabetes mellitus (DM) and congenital heart disease. BBS patients are friendly with a happy predisposition. Proper management, and regular examinations should be done in order to maintain healthy organ function and to avoid an early death. Renal failure is the most common cause of mortality in BBS patients.This case report illustrates the evaluation of a child with BBS, as well as the unique association of otolaryngologic symptoms and bronchopneumonia with it.

Laurence-Moon-Bardet-Biedl Syndrome: A Case Report

Laurence-Moon-Bardet-Biedl syndrome (LMBBS), a rare autosomal recessive defect, mostly occurs in children born from consanguineous marriages. The major features of this syndrome are cone-rod dystrophy, polydactyly, obesity, learning disabilities, hypogonadism in males, renal anomalies, nystagmus, speech disorders, developmental delay, polyuria/polydipsia, ataxia, and poor coordination/clumsiness. In this report, we present a case of a 19-year-old man with pain and swelling of the left ankle and knee joints because of which he could not walk, with an onset of loose stools since a week. He presented with multiple non-itchy hyperpigmented macules on his face and back, polydactyly in his left foot, central obesity, proteinuria, macrocytic anemia, low intelligence quotient, reduced power in the left lower limb, reduced plantar reflexes, nystagmus, pigmented black lesions in the temporal retina on fundoscopy, a micropenis, absent pubic and axillary hair, and a small scrotum containing testes. The patient was diagnosed with LMBBS.

Screening for mutation hotspots in Bardet-Biedl syndrome patients from India

Background & objectives:

Bardet–Biedl syndrome (BBS) is a genetically heterogeneous autosomal recessive disorder characterized by multiple organ defects involving retina, kidney, liver and brain. Disease-causing mutations in BBS genes narrowed down by homozygosity mapping in small consanguineous and non-consanguineous pedigrees were reported in 80 per cent of the study population. This study was aimed to screen these genes (BBS3, BBS10) and specific exons of BBS genes (BBS1, BBS5, MKKS, BBS9, BBS11 and BBS12) for recurrent mutations in a selected sample of BBS patients.

Methods:

The recurrent mutations in BBS genes were screened in the BBS affected individuals by PCR based direct sequencing. The pathogenicity of the observed mutations were confirmed by co-segregation analysis, screening of healthy unrelated controls and in silico analysis.

Results:

In the 64 BBS patients (44 males, 20 females) were studied, mutations were predominant in BBS10 and ARL6 genes; the c.272T>C; p.(I91T) mutation in ARL6 gene was a recurrent mutation. One novel non-sense mutation c.425T>G; p(L142^*) was obtained in BBS5 gene (family BSI-31).

Interpretation & conclusions:

BBS10 gene mutations clustered in exon 2 of the gene suggesting the exon as a probable hotspot for mutations in Indian population. A cost- and time-effective strategy for the molecular diagnosis of BBS was designed based on these results.

Bardet Biedel Syndrome: a Rare Cause of Chronic Kidney Disease

Bardet Biedl syndrome (BBS) is characterized by obesity, retinitis pigmentosa, hypogonadism, mental retardation and polydactyly. Additionally, renal, cardiac and neurological manifestations may be seen. We report a case of BBS with chronic kidney disease (CKD) at the age of 43.

Bardet-biedl syndrome: a rare cause of chronic kidney disease

Bardet-Biedl syndrome (BBS) is a rare autosomal recessive condition characterized by retinitis pigmentosa, postaxial polydactyly, central obesity, and renal involvement. Renal failure is the commonest cause of death. We report a case of BBS with chronic kidney disease (CKD) at younger age (17 year) from India. This diagnosis should be considered in patients with renal disease and the characteristic phenotype of retinitis pigmentosa, postaxial polydactyly and central obesity. These patients should undergo regular monitoring of renal function test to early diagnosis and treatment of CKD to prevent morbidity and mortality. Renal transplantation is a viable option of renal replacement therapy in these patients. These findings are valuable for comparing phenotype of BBS patients with CKD from various national and international centers.