Clasp-knife syndrome

Case contributed by Dr Omar M. Sultan

Presentation

Low back pain.

Patient Data

Age: 35 years
Gender: Male
X-ray

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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Case information

rID: 37616
Case created: 15th Jun 2015
Last edited: 23rd Apr 2017
Inclusion in quiz mode: Included

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