Bilateral posterior iliac horns
Iliac horn is pathognomic for Nail patella syndrome, present in 80 % of cases of this syndrome.
Nail-patella syndrome (NPS), also known as hereditary osteo-onychodysplasia (HOOD), is an uncommon genetically determined disease that involves organs of both ectodermal and mesodermal origin.
The diagnostic tetrad includes fingernail dysplasia, absent or hypoplastic patellae, the presence of posterior conical iliac horns, and deformation or location (ie, hypoplasia) of the radial heads. Kidney disease and glaucoma are now recognized as part of the syndrome. The most serious complication associated with NPS is nephropathy.
- Diagnostic radiographic findings include the following:
- Hypoplastic patellae
- Bilateral posterior iliac horns
- Hypoplasia of the radial head or capitulum
- The following findings are also reported:
- Scapular hypoplasia
- Scoliosis
- Hypoplastic lateral humerus epicondyle
In the above given case iliac horn is isolated abnormality no other signs of Nail -patella sydrome are seen.