<unk>  may present as a primary mental disorder, or as a symptom of another psychiatric illness. With secondary<unk> , the<unk>  delusions are due to other mental disorders such as bipolar I disorder or schizophrenia. Symptoms may also be precipitated by alcoholism and the use of antidepressants. There may be a potential genetic component involved as family histories of first degree relatives with histories of psychiatric disorders are common. Sigmund Freud explained<unk>  as a defense mechanism to ward off homosexual impulses which can lead to strong feelings of paranoia, denial, displacement and projection. Similarly, it has been explained as a way to cope with severe loneliness or ego deficit following a major loss.<unk>  may also be linked to unsatiated urges dealing with homosexuality or narcissism. Some research shows brain abnormalities occurring in patients with<unk>  such as heightened temporal lobe asymmetry and greater volumes of lateral ventricles than those with no mental disorders.
Erotomania
Dipsomania
Anotia
Dysmelia
Onychotillomania
Melanonychia
Coccydynia
Amaurosis fugax