Somatic delusions

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From the Mind Hacks blog, here is an excerpt from the case history of a somatic delusion I'd prefer never to experience:

From September, [the patient] felt that “there is another lower jaw with teeth between the real upper jaw and real lower jaw, and there is another tongue between the false lower jaw and the real lower jaw”; “the teeth on the false lower jaw are growing steadily”; “I try to cut the false teeth off with the real teeth, but the false teeth do not stop growing”; “the false teeth melt into holes in the false lower jaw, but later grow again from those holes”; “something like spaghetti is coming into and going out from the holes” and “the false lower jaw rolls up and is coming into the throat.”

Yeesh. The Mind Hacks article indicates that a "somatic delusion" is a persistent distorted perception or awareness of one's own body. Through a brain scan, the patient was found to have reduced blood flow in the parietal lobe, which helps to provide a person's own "body image." The Mind Hacks writeup can be found here.