Pedophiles more likely to have physical irregularities

New research suggests pedophiles are more likely to have superficial facial flaws, known as Minor Physical Anomalies (MPAs). They are also more likely to be left-handed, says Fiona Dyshniku of the University of Windsor in Canada. She led an investigation into the prevalence and distribution of physical anomalies among men who are sent for sexological assessment. The study in Springer’s journal Archives of Sexual Behavior adds to a growing body of evidence that suggests pedophilia develops prenatally, around the same time that such physical flaws develop.

“Evidence is steadily accumulating to support a neurodevelopmental basis of pedophilia,” says Dyshniku. “If we find that pedophilia has a biological basis, with a very early, even prenatal onset, this will influence and hopefully improve methods of treatment for this group.”

Facial anomalies could, among others, include having non-detached earlobes, malformed ears, or a high or steepled palate. These features develop during the sensitive first and early second trimesters while a baby is still in the womb, from the same primary embryonic tissue layer that gives rise to the central nervous system. They could develop because of prenatal exposure to viruses, alcohol or drugs, obstetric complications, or nutritional deficiencies. Such features are more prevalent among men, which might mean that the male brain is more susceptible to disruptive events during prenatal development.

If we know more about the etiology of an injurious behavior, we can create more effective treatments and look toward prevention,” says Rachel Fazio, clinical neuropsychologist and co-author of the study. “For years, it was thought that child molestation was somewhat of a learned behavior, potentially from the abusers having been sexually abused themselves as children. While this may be a factor in some cases, this is not the case in those with genuine pedophilia.”

The 140 consenting participants who took part in Dyshniku’s study were referred to the Kurt Freund Laboratory of the Centre for Addiction and Mental Health in Toronto to be assessed for distressing or illegal sexual behavior. The routine sexological assessment consisted of a forensic and medical file review, a semi-structured interview spanning offense and sexual history, and a phallometric test for erotic preference. The presence of specific physical anomalies and participants’ right or left handedness were also assessed.

What is a pedophile?

A pedophile is a person who has a sustained sexual orientation toward children, generally aged 13 or younger, Blanchard says.

Not all pedophiles are child molesters (or vice versa). “Child molesters are defined by their acts; pedophiles are defined by their desires,”  sexologist Ray Blanchard, PhD, adjunct psychiatry professor at the University of Toronto, says. “Some pedophiles refrain from sexually approaching any child for their entire lives.” But it’s not clear how common that is.
Does the medical community consider pedophilia to be a mental disorder?

Yes. The American Psychiatric Association (APA) has included pedophilia in its Diagnostic and Statistical Manual of Mental Disorders since 1968.

In the DSM, which is updated periodically, pedophilia has been grouped with other paraphilias - which the APA defines as “recurrent, intense sexually arousing fantasies, sexual urges, or behaviors that involve children, nonhuman subjects, or other non-consenting adults, or the suffering or humiliation of oneself or one’s partner.”

But the next edition of the DSM - the DSM 5 - may instead refer to “pedophilic disorder.

“[Pedophiles] would be diagnosed with pedophilic disorder either if their attractions toward children are causing them guilt, anxiety, alienation, or difficulty in pursuing other personal goals, or else if their urges cause them to approach children for sexual gratification in real life,” Blanchard says.

The findings suggest that the pedophiles who participated in the study were more likely to have minor facial and head anomalies than was the case for men who were not pedophiles. These deviations were more prevalent on the head than elsewhere on the body. Those with quite a few of these facial deviations also scored higher on other indicators of pedophilia.

Pedophiles more likely to have physical irregularities The finding that such men are also more likely to be left-handed confirms previous research on the matter. Handedness is a result primarily of prenatal neural development and is solidified very early in life.


Reference: Dyshniku, F., et al. (2015). Minor Physical Anomalies as a Window into the Prenatal Origins of Pedophilia, Archives of Sexual Behavior. DOI 10.1007/s10508-015-0564-7


Stefanie Eggert

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Archives of Sexual Behavior

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