A twin study conducted by the Department of Psychology at Oslo University attempted to establish a correlation between genetics and Cluster B personality disorders. With a test sample of 221 twins, 92 monozygotic and 129 dizygotic, researchers interviewed the subjects using the Structured Clinical Interview for DSM-III-R Personality Disorders (SCID-II) and concluded that there was a correlation of 0.67 that histrionic personality disorder is hereditary. Psychoanalytic theory
Though criticised as being unsupported by scientific evidence, psychoanalytic theories incriminate authoritarian or distant attitudes by one (mainly the mother) or both parents, along with conditional love based on expectations the child can never fully meet. Using psychoanalysis, Freud believed that lustfulness was a projection of the patients lack of ability to love unconditionally and develop cognitively to maturity, and that such patients were overall emotionally shallow. He believed the reason for being unable to love could have resulted from a traumatic experience, such as the death of a close relative during childhood or divorce of ones parents, which gave the wrong impression of committed relationships. Exposure to one or multiple traumatic occurrences of a close friend or family members leaving (via abandonment or mortality) would make the person unable to form true and affectionate attachments towards other people. HPD and antisocial personality disorder
Another theory suggests a possible relationship between histrionic personality disorder and antisocial personality disorder.
Chondrodysplasia punctata is a clinically and genetically diverse group of rare diseases, first described by Erich Conradi (1882–1968), that share the features of stippled epiphyses and skeletal changes. : 500 : 549

Types
Rhizomelic chondrodysplasia punctata  215100,  222765,  600121
X-linked recessive chondrodysplasia punctata  302950
Conradi–Hünermann syndrome (chondrodysplasia punctata 2, x-linked dominant)  302960
Autosomal dominant chondrodysplasia punctata  118650

See also
List of cutaneous conditions
List of radiographic findings associated with cutaneous conditions

References


== External links ==