[Cysts of the body of gastric mucosa glands in a female patient with Peutz-Jeghers syndrome and stomach cancer].

A female patient of 18 with Peutz-Jeghers syndrome and gastric cancer was found to have in macroscopically intact areas of gastric mucosa cysts of the body of the gastric mucosa glands (the first observation in the national literature) which were characterized by glandular structures of various sizes lined with clear columnar epithelium with basally located nucleus and with production of the PAS-positive substance. Some of the cysts extend into the gastric lumen, some form polyps. They should be regarded as hamartomas. When the cystic epithelium undergoes malignant transformation, the trend for mucus formation is not lost.