An old man comes to the doctor complaining that a part of this body is rotten and he wants it removed. What is the most likely diagnosis?

The key is D. Nihilism. [Nihilistic delusion: parts of the body do not exist or are dead]

• Guilt: an emotion that occurs when a person feels that they have violated a moral standard.

• Hypochondriasis: worry about having a serious illness.

• Munchausen’s: a psychiatric factitious disorder wherein those affected feign disease, illness, or

psychological trauma to draw attention,sympathy, or reassurance to themselves.

• Capgras syndrome: a delusion that a friend, spouse, parent, or other close family member (or

pet) has been replaced by an identical-looking impostor.