Friday 21 June 2013

Osteopoikilosis - MRI features

Coronal IR

Coronal T1

Coronal T1

Rorschach




Young patient who presented with low back ache and came in for an MRI of the lumbar spine.

Lumbar spine images demonstrated a marked posterior disc extrusion at L4/5 accounting for the patient’s symptoms.

However on the routine coronal IR images multiple well defined ovoid hypointense foci were noticed in the pelvic girdle and femur.

An additional coronal T1 was acquired which demonstrates multiple numerous dark foci representing bone islands

Reminded me of the facial features of Rorshach from the cult graphic novel “The  Watchmen”

Diagnosis: Osteopoikilosis

Osteopoikilosis:  

- is a sclerosing bone dysplasia with multiple 
        enostoses
- develop during childhood and do not regress and 
        therefore are seen in all age groups
- asymptomatic 
- often found concurrently with osteopathia striata, 
        and melorheostosis 
- bone islands of osteopoikilosis are typically 
        clustered around joints and align themselves        
        parallel to surrounding trabeculae
- found in the appendicular skeleton and pelvis
- axial skelton is largely spared. It is rare for the 
        skull vault to be involved 
- is one of the skeletal “Don’t touch” lesions.

References:








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