Background: Bochdalek hernia is a congenital diaphragmatic hernia. Presentations in adulthood are rare with an incidence of 0.17-6%. Left-sided hernias are more common due to the liver mass effect. In this paper we present a right-sided Bochdalek hernia after a prolonged period of alcohol abstinence. Case history: A 56-year-old female with a history of heavy alcohol dependence presented to an Emergency Department (ED) with dyspnoea and severe right upper quadrant abdominal pain. Computed tomography (CT) imaging demonstrated a herniated loop of right hemicolon measuring up to 9cm and a posterior liver segment. Emergent surgery was performed with a laparoscopic converted to open right subcostal approach. Non-resorbable continuous closure of the diaphragm was performed. The patient recovered uneventfully and was discharged on postoperative day 6. Results/Discussion: The rarity of the condition precludes any high-quality methodological studies. One previous systematic review reported on 44 cases of adult right-sided non-traumatic Bochdalek hernias, occurring frequently in middle-aged and older women often presenting with abdominal pain and dyspnoea.1 This case expands on the important consideration of defect size. The likely precipitant to this presentation is the reduction in liver size secondary to a prolonged period of alcohol abstinence. Conclusion: Adult right-sided Bochdalek hernias is a rare surgical entity and should be considered as a surgical emergency to prevent significant morbidity and mortality. 1. Ramspott JP, Jager T, Lechner M, et al. A systematic review on diagnostics and surgical treatment of adult right-sided Bochdalek hernias and presentation of the current management pathway. Hernia. Feb 2022;26(1):47-59. doi:10.1007/s10029-021-02445-1