A 28-year-old man presented with numerous musculoskeletal findings, the following of which were noted (Figure 1): in the head and neck: dolichocephaly, malar hypoplasia, highly arched palate, retrognathia, and ectopia lentis with iridodonesis; in the extremities: long limbs (dolichostenomelia), long, tapered fingers (arachnodactyly), contractures of several joints, and pes planus, as well as “thumb sign” (Figure 2) and “wrist sign” (Figure 3); and in the torso: pectus carinatum, scoliosis, and striae atrophicae. His medical history was notable for spontaneous pneumothorax and aortic root dilatation.
What is your diagnosis?