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KMID : 1040920200050010036
Journal of Minimally Invasive Spine Surgery and Technique
2020 Volume.5 No. 1 p.36 ~ p.41
Endoscopic Resection of Symptomatic Degenerative Repetitive Stress Related Fracture of the Tip of Superior Articular Process. An Unusual Cause of Severe Back Pain: Report of 2 Cases and Technical Note
Kim Hyeun-Sung

Wu Pang Hung
Raorane Harshavardhan Dilip
Heo Dong-Hwa
Lee Yeon-Jin
Yang Kyung-Hoon
Jang Il-Tae
Abstract
Neglected stress related fracture of superior articular process fracture leading to disability is not commonly reported. Intravertebral foraminal ligament attachment to superior articular process is well described but its repetitive stress related avulsion injury was not reported. The presence of abundant sensory and nociceptive nerve endings around the facet joint can cause significant symptoms in this uncommon condition. We hereby present 2 cases of superior articular process tip fracture. First case is a 53 years old business who presented with intractable chronic back and right gluteal pain for many years worsened with golf games with the diagnosis of nonunion of right L2 superior articular facet and second case is a 74 years old lady who had intractable left buttock and left calf radicular pain with neglected left L5 superior articular facet tip fracture after vertebroplasty treatment on L4 compression fracture; both underwent uniportal endoscopic contralateral approach for decompression and resection of the Superior Articular Process, SAP tip fragment with its attached foraminal ligament with good symptoms relief on one year follow up. Consideration can be made for endoscopic decompression SAP tip fracture in comparison to open decompression or fusion surgery in these symptomatic patients.
KEYWORD
Spine fracture, Endoscopic spine surgery, Sports injury, Superior articular process, Foraminal ligament, Repetitive stress fracture, Lumbar endoscopic unilateral laminotomy for bilateral decompression
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