PMC9235307_01
(A) Pedigree of the family. Circles represent females and squares represent males. An arrow indicates the proband. Filled shapes represent affected individuals. (B, C) Radiographs of the right and left knee of patient III:1 showing laterally dislocated hypoplastic patella (arrows). (D) Radiograph of the left elbow of patient III:1 shows posteriorly dislocated radial head (arrow). (E) Dysplastic nails of patient III:2.
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The studied family is of Swedish descent and includes a 50-year-old man (proband), his mother and three children ( Figure 1A ). The clinical findings of the affected individuals are summarized in  Table 1  and  Figure 1 .