Anterior cervical spinal surgery can lead to various complications. We hereby present a case of two rare complications combined-pharyngo-oesophageal diverticulum and its perforation after cervical plate dislodgement. A 53-year old male patient presented with progressive dysphagia 18 years after anterior cervical spinal fusion with tricortical bone graft and custom-made plate at the C6/7 level. Oesophagography revealed a pharyngo-oesophageal diverticulum in front of the cervical plate. It was confirmed by subsequent oesophagoscopy, which also demonstrated a 3-cm longitudinal defect at the posterior wall of the diverticulum. During surgical exploration of the patient's neck, the plate was removed, the diverticulum was completely mobilized and excised, the oesophageal wall manually sutured and a cricopharyngeal myotomy performed. An oesophageal suture line failure was suspected postoperatively, but was not confirmed during reoperation. A year later, the patient has no dysphagia or any other symptoms.