Gracile Bones Mnemonic – NIMROD

This mnemonic has been commonly used to recall the differential diagnosis for gracile bones – NIMROD

N – Neurofibromatosis
I – Immobilization (Paralysis)
M – Muscular Dystrophy
R – Rheumatoid Arthritis
O – Osteogenesis Imperfecta (click the link or see below)
D – Dysplasias (Marfan’s syndrome, Homocystinuria)

Osteogenesis Imperfecta: Radiograph of the bilateral lower extremities reveals marked bowing deformities of the femurs, tibias, and fibulas with a background of diffuse osteopenia. The tibia and fibula also have a gracile diaphysis appearance, or overtubulation.