Inability to Belch and Associated Symptoms Due to Retrograde Cricopharyngeus Dysfunction: Diagnosis and Treatment

To propose and test the validity of a new syndrome called retrograde cricopharyngeus dysfunction (R-CPD) that explains inability to belch and the associated symptoms of loud gurgling noises, chest and abdominal pain/distention, and excessive flatulence, as well as to report the results of botulinum toxin (BT) injection into the cricopharyngeus muscle (CPM) for both diagnosis and treatment of R-CPD. To develop a case series of consecutive patients matched to the syndromic features of R-CPD, inject the CPM with BT as a concurrent diagnostic and therapeutic maneuver, and assess results. Bastian Voice Institute (Downers Grove, Illinois). Consecutive (unselected) patients presenting with inability to belch and associated symptoms were matched to the proposed syndrome of R-CPD, treated with BT, and followed for effect on symptoms over time. All 51 patients achieved ability to belch and relief of associated symptoms, and the majority seem to have “retrained” the ability to belch on a potentially “permanent” basis. R-CPD can be diagnosed syndromically, using a symptom complex; clinical diagnosis is validated by relief of symptoms after BT injection; and BT into the CPM is an efficacious treatment, whose benefit appears to often last longer than the pharmacologic duration of action of BT