Saturday, May 19, 2012

Gracile Bones Differential Diagnosis

Today's Daily Diff concerns gracile bones. This finding is described as a bone which is thinner than normal and slender. The bone may or may not be osteopenic. The causes of gracile bones can be remembered by the mnemonic NIMROD: 

DiseaseNotes
NNeurofibromatosis
IImmobilization / paralysisMore likely if gracile bone matches area of paralysis
MMuscular dystrophy
RRheumatoid arthritis (juvenile)
OOsteogenesis imperfecta
DDysplasisex. Marfan's syndrome, homocystinuria


A gracile radius is seen in the top image; the bottom is normal.
Source: HighWire