Pica is a medical term that refers to people who eat substances that are not nutritious like clay, dirt, paper or starch. Lithophagia is the eating of rocks or pebbles. The Xray above is from a 48 year old homeless man who came to the emergency department with abdominal pain, constipation and intermittent blood in his stool for 2 weeks. The abdominal Xray showed small radio-opaque pebbles and gravel that the patient admitted eating over the last 9 months. He believed that "God might turn it to bread in his belly." He was given the diagnosis of nonspecific delusional disorder.
The patient underwent a purge with polyethelene glycol electrolyte solution. (It is the same solution that is used for bowel prep before a colonoscopy). Some of the pebbles had to be manually removed under general anesthesia. His symptoms improved and follow-up Xray showed compete removal of the stones. Unfortunately the patient was lost to follow-up after discharge from the hospital.
Geophagia is the eating of clay or dirt and it is not uncommon in the setting of famine and poverty. There have only been 2 cases of lithophagia reported in the medical literature.
(Case from University of Wisconsin School of Medicine and Public Health, ConsultantLive)