Presentation
Low back pain.
Patient Data
Age: 35 years
Gender: Male
From the case:
Clasp-knife syndrome
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S1 spina bifida associated with elongated spinous process of L5. Thickening of left transverse process of L2 and L3. Small pelvic phlebolith seen on the left.
Case Discussion
S1 spina bifida associated with elongated spinous process of L5 resulting in a classical deformity known as clasp knife deformity. When this deformity is associated with pain during extension, it is known as clasp-knife syndrome.
Thickening of left transverse process of L2 and L3 may be related to previous trauma or fracture.
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