Osteopoikilosis is a benign autosomal dominant condition where small multiple bone islands are found predominantly in the epiphyses and metaphyses of the long bones, pevis and scapula. The low signal of the lesions on the proton-density MR shown here reflects the low water content of cancellous bone. T1 and T2-weighted MR also show low signal.

Credit: Dr Laughlin Dawes