The subjects of this curious complaint are usually men about middle age who, in their morbid desire for alcohol, frequently have drunk varnish, polish, or similar liquids containing it. As a rule the stone is too small to be detected during life, but in the case recorded by Tidemand a large hard tumour could be felt in the epigastrium. Symptoms of gastric irritation with vomiting are almost always present, and haematemesis is sometimes observed. Death ensues from exhaustion, perforation of the stomach, or from intestinal obstruction (Friedlander, Langenbuch).