Presentation
Slow-growing swelling in the lower back
Patient Data
Age: 4 years
Gender: Male
From the case:
Lumbar digit
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Osseous structure with clear corticomedullary differentiation (digit) pseudo-articulating with spinous process of L3 vertebra. There is another small osseous structure pseudo-articulating with this digit posteriorly (phalanx).
Multilevel spina bifida noted from L2 to S1.
Case Discussion
A lumbar digit is an extremely rare developmental anomaly. It is usually associated with one or more pseudo-articulations.
It must be differentiated from heterotopic ossification, osteochondroma, and traumatic avulsion injuries.
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