Surgical management of idiopathic acute cervical kyphosis; A case-based review of an extremely rare entity.

INTRODUCTION AND IMPORTANCE: Acute idiopathic cervical kyphosis (AICK) represents a rare entity, and its management remains controversial. Preoperative surgical planning and individual decision-making seem necessary. To date, there is a lack of sufficient evidence and clear guidelines.

CASE PRESENTATION: A 21-year-old male was referred with a progressive cervical deformity detected 3 months earlier. The patient suffered from severe progressive myelopathy and represented neither neck trauma nor a familial history of similar expected conditions. His cervical imaging revealed 95 degrees of cervical kyphosis. After 3 separate surgical sessions for 360-degree fixation, the cervical kyphosis was reduced by 90 degrees. No facet dislocation was observed, and laminectomy was unnecessary. Post-operative neurological examination detected significant improvement. Six months and 2-year follow-ups were favorable. To the authors' knowledge, the current case had the most extensive degree of cervical kyphosis reported in the literature.

CLINICAL DISCUSSION: Multistage correction of AICK would result in a favorable outcome and reduce the risk of complications. Particular attention should be paid to the wide inter-spinous spaces in high grades of kyphosis during sub-periosteal dissection to prevent iatrogenic spinal cord injuries.

CONCLUSION: The present work may provide the first report on the role of cervical postural habits in patients with opiate substance abuse disorder, which could have triggered cervical kyphosis in this particular patient. Multistage correction of AICK would result in a favorable outcome and reduce the risk of complications.