<P> Choristomas, forms of heterotopia, are closely related benign tumors, found in abnormal locations . </P> <P> It is different from hamartoma . The two can be differentiated as follows: a hamartoma is disorganized overgrowth of tissues in their normal location, (e.g., Peutz--Jeghers polyps) while a choristoma is normal tissue growth in an abnormal location (e.g., gastric tissue located in distal ileum in Meckel diverticulum). </P> <P> MeSH C23. 300.250 - Choristoma </P>

What is the difference between hamartoma and choristoma
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