What's your diagnosis? The patient also has square-shaped knees. I'll post the correct answer in a couple of days!
nail-patella syndrome, autosomal dominant genetic disorder, is characterised by poorly developed fingernails, toe nails & patellae.
Correct answer: Yes, it's nail-patella syndrome. Actually not such a good name, because other bone structures can be affected as well, e.g. the elbows and hips. The most common presentation however is the presence of underdeveloped nails and patellae. Inheritence is autosomal dominant.