An 18-year-old Chinese male was admitted to our hospital with recurren
t abdominal pain, abdominal distension and intermittent non-bilious vo
miting of about 2 months standing. A mildly tender mass measuring abou
t 6 x 7 cm was present in the right upper quadrant area, and an abdomi
nal computed tomography scan with enhancement showed a clearly encapsu
lated mass occupying the right side of the upper intra-abdominal area.
Endoscopy revealed two huge cauliflower-like polyps and one small pol
yp in the stomach, and the biopsy specimens showed hyperplastic polyps
. Moreover, multiple pigmentation of the buccal mucosa was also noted.
The intra-abdominal mass was found to be a gastroduodenal intussuscep
tion following laparotomy. Gastroduodenal intussusception occurring se
condarily to Peutz-Jegher syndrome, is a rarely documented condition.
Only one case has been reported in Japan during the previous years. We
report on another case, and review the literature.