Table 3.
Presentation of genotypes of patients with BBS.
| Patient ID | Sex | Gene | Zygosity | Variant details | ClinVar interpretation | Current age |
Age of the patient at the time of diagnosis | Clinical reason for genetic testing |
|---|---|---|---|---|---|---|---|---|
| P1 | Male | BBS10 | Homozygous | NM_024685.4 (BBS10):c.145C>T (p.Arg49Trp) | Pathogenic/ likely pathogenic |
10 years 11 months |
4 years 6 months | obesity, polydactyly, psychomotor delay |
| P2 | Female | MKKS | Homozygous | NM_018848.3 (MKKS):c.1436C>G(p.(Ser479*)) | Pathogenic | 5 years 3 months |
8 months | obesity, polydactyly, abnormal image of kidneys on ultrasound |
| P3 | Male | MKKS | Homozygous | NM_018848.3(MKKS):c.1436C>G(p.(Ser479*)) | Pathogenic | 3 years 4 months |
2 months | abnormal image of kidneys on ultrasound, CKD, polydactyly siblings with BBS |
| P4 | Male | BBS10 | Heterozygous | NM_024685.4 (BBS10):c.424G>A (p.Asp142Asn) | Benign/ Likely benign |
13 years 8 months |
6 years | obesity, polydactyly, psychomotor delay, ASD |
| BBS7 | Homozygous | NM_176824.3 (BBS7):c.1967_1968delinsC (p.Leu656Profs*18) | Pathogenic | |||||
| P5 | Male | BBS10 | Heterozygous | NM_024685.4 (BBS10):c.424G>A (p.Asp142Asn) | Benign/ likely benign |
2 years 11 months |
2 months | abnormal image of kidneys on ultrasound, polydactyly, siblings with BBS |
| BBS7 | Homozygous | NM_176824.3 (BBS7):c.1967_1968delinsC (p.Leu656Profs*18) | Pathogenic | |||||
| P6 | Male | BBS7 | Compound heterozygous | NM_176824.3 (BBS7): c.1967_1968delinsC(p.(Leu656Profs*18)) | Pathogenic | 4 years 7 months |
9 months | abnormal image of kidneys on ultrasound, CKD, polydactyly, |
| P7 | Male | BBS7 | Compound heterozygous | NM_176824.3 (BBS7): c.754G>T(p.(Asp252Tyr)) | no data given | 7 years 2 months |
1 month | abnormal image of kidneys on ultrasound |
| BBS7 | Compound heterozygous | NM_176824.3 (BBS7): c.1967T>C(p.(Leu656Pro)) | no data given | |||||
| BBS7 | Compound heterozygous | NM_176824.3 (BBS7): c.280A>C(p.(Thr94Pro)) | no data given | |||||
| P8 | Female | BBS9 | Homozygous | NM_001033604.2 (BBS9):c.1687C>T | Pathogenic | 4 years | 2 years 6 months |
abnormal image of kidneys on ultrasound, polydactyly |
(CKD, chronic kidney disease; ASD, autism spectrum disorder).