Intraforaminal cervical gas cyst with vacuum disc treated by anterior cervical discectomy and fusion: illustrative case

BACKGROUND: The authors report an extremely rare presentation of a patient with an intraforaminal cervical gas cyst with radiculopathy. The patient’s condition was refractory to conservative treatment, and he was treated by anterior cervical discectomy and fusion (ACDF). Several intraspinal gas cysts with lumbar disc herniation have been treated surgically. However, no cases of intraforaminal cervical gas requiring ACDF have been reported. OBSERVATIONS: A 70-year-old male patient presented with right-sided neck and shoulder pain, aggravating in the supine position. Cervical radiography showed vacuum disc phenomenon at C4–5, and multiplanar computed tomography showed intraforaminal gas along the right C5 nerve root. The patient experienced severe pain with impaired sleep and daytime fatigue. After confirming C5 radiculopathy using an echo-guided technique using ultrasonography guidance, the authors performed C4–5 ACDF. Postoperatively, the patient’s neck and shoulder pain disappeared immediately. There was no recurrence at the 2-year follow-up. LESSONS: This is the first case report of an intraspinal cervical gas cyst with radiculopathy treated by ACDF surgery. The vacuum disc had been implicated as the genesis of the intraforaminal cervical gas cyst, leading to radiculopathy. ACDF surgery provides favorable outcomes in cases of intraspinal gas refractory to conservative therapy.