Spontaneous gallbladder perforation in a patient of situs inversus totalis, misdiagnosed as perforation peritonitis due to gas under the right dome of the diaphragm

Acute biliary tract disease is a common condition in adults. Apart from bile duct perforation, spontaneous perforation of the gallbladder itself is very rare in all age groups; to date, all recorded cases are secondary to coexistent disease. We present the case report of a 60-year-old adult having an idiopathic gallbladder perforation. In our case, an unusual presentation was situs inversus totalis and fundal gas shadow was considered as free air under the right dome of the diaphragm by mistake. The patient underwent laparotomy and emergency cholecystectomy was performed in the perforated gallbladder. To date, no case has been described in the literature.