WINSTON-SALEM, N.C. - Aug. 6, 2019 - The internet can serve as a pathway to diagnosis and care for people who suspect they have a rare condition that has not been identified by their physicians, according to a study by researchers at Wake Forest School of Medicine, part of Wake Forest Baptist Health.

"Rare diseases, especially inherited ones, are often not correctly diagnosed by primary care physicians and even specialists because they are so uncommon, and a provider who does have expertise may be located very far from the patient," said the study's lead author, Anthony J. Bleyer, M.D., professor of nephrology at the medical school. "While online searches can frequently fail to provide relevant or correct health information, the internet does offer those with rare disorders a way to find the rare specialists interested in a particular condition and obtain accurate information about it."

The study, published in the current issue of the Genetics in Medicine, the official journal of the American College of Medical Genetics and Genomics, analyzed 665 referrals made from 1996 to 2017 to a Wake Forest School of Medicine research center specializing in autosomal dominant tubulointerstitial kidney disease (ADTKD), a group of rare inherited conditions that gradually cause kidneys to stop working.

Among the referrals, 40 percent were from health care providers at academic medical centers, 33 percent were from non-academic practitioners and 27 percent were self-referrals from individuals or family members with concerns about but no diagnosis of inherited kidney disease who contacted the center directly through its website without guidance or assistance from a health care provider.

Genetic testing results were positive (indicating the presence of ADTKD) in 27 percent of the cases referred by academic centers, 25 percent of those referred by non-academic providers and 24 percent of those who contacted the center directly.

"The similar percentages of positive results from the three types of referrals indicate that actively pursuing self-diagnosis using the internet can be successful," Bleyer said. "One-quarter of the families found to have ADTKD were diagnosed as result of direct contact with the center through the internet, which represents 42 families and 116 individuals who otherwise would have gone undiagnosed if a family member had not contacted us."

One of the study's limitations is that it examined data from only one center specializing in a single rare disorder.

Nonetheless, Bleyer said, the study highlights the importance of the internet as a resource for people with rare conditions.

"The availability of focused information about rare disorders on the internet may lead to increased diagnoses of these conditions," he said. "Centers interested in rare disorders should consider improving their online accessibility to the public."

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The research was supported by the National Institute of Diabetes and Digestive and Kidney Diseases of the National Institutes of Health under the award number R21DK106584 and by the Ministry of Health and Ministry of Education of the Czech Republic; Charles University, Prague; and the Carlos Slim Foundation.

Collaborators in the research are co-investigator Stanislav Kmoch, Ph.D., First Faculty of Medicine, Charles University, Prague, Czech Republic, and Anna Greka, M.D., Ph.D., at the Broad Institute of Harvard Medical School and MIT, Cambridge, Massachusetts.