|  | Primary BBS features |  |  |  |  |  | Secondary BBS features |  |  |
---|---|---|---|---|---|---|---|---|---|---|
Age at presentation (years) | Post axial polydactyly | Retinal dystrophy | Renal anomalies | Learning difficulties | Hypogonadism | Obesity | Developmental delay | Congenital heart disease | Astigmatism | |
Affected female | 9 | Y | Ya | Yb | Y | n/a | Y | Y | N | Y |
Affected female | 7 | Y | N | Yc | Y | n/a | Y | Y | VSD | N |
Affected male | 3 | Y | N | N | Y | Y | Y | Y | VSD | N |