Colorado resident, 20, with ‘mild’ coronavirus case later develops rare condition: officials

A 20-year-old Colorado resident who battled the novel coronavirus later developed a rare but serious condition known as multisystem inflammatory syndrome (MIS-C), according to local health officials in the state. 

The resident, of Boulder County, suffered only mild symptoms of COVID-19 and “appeared to have fully recovered,” said county officials in a news release. But three weeks later, the resident fell ill once more — this time with “severe abdominal pain, watery diarrhea, and fever,” all of which are signs of MIS-C. 

Earlier this month, the Centers for Disease Control and Prevention (CDC) identified the condition among adults, drawing on reports of 27 adult patients to describe a new, similar condition known as multisystem inflammatory syndrome in adults (MIS-A). (iStock)

Since the pandemic began, there have been various reports of multisystem inflammatory syndrome, but most cases have occurred in children, which is known as MIS-C.

The syndrome is an inflammatory condition that is similar to Kawasaki disease, which causes swelling in arteries throughout the body. Many children with MIS-C — which causes inflammation in the heart, lungs, kidneys, brain, skin, eyes, or gastrointestinal organs —  have either been infected with the novel coronavirus or had been exposed to someone with a COVID-19 infection, health officials have sad. MIS-C can also cause persistent fever, rashes, vomiting and diarrhea, among other symptoms such as a red tongue and eyes.

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However, earlier this month, the Centers for Disease Control and Prevention (CDC) identified the condition among adults, drawing on reports of 27 adult patients to describe a new, similar condition known as multisystem inflammatory syndrome in adults (MIS-A).

“Findings indicate that adult patients of all ages with current or previous SARS-CoV-2 infection can develop a hyperinflammatory syndrome resembling MIS-C,” the authors wrote at the time, adding that measures to limit COVID-19 spread may help prevent MIS-A.

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The Colorado patient required hospitalization and intensive care before they improved and were eventually discharged from the hospital. However, “while most young adults experience mild symptoms from COVID-19,” officials warned, “this case is an example of how the disease can progress and how little is known about the long-term impacts of the illness.”

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“I hope sharing the information about this patient’s experience will help others to better understand how serious COVID-19 can be, even for young people,” said Dr. Heather Pujet, an infectious disease doctor at Boulder Community Health, in a statement. “The patient became extremely ill very quickly with multi-organ system involvement; they fortunately recovered after a period of severe illness. However, this should serve as a warning for the younger people in the community to please not disregard their own personal risks with COVID-19.”

“Much remains unknown about how this condition develops, but it’s related to the body’s attempts to fight an invader,” added Dr. Sam Dominguez, a pediatric infectious disease specialist at Children’s Hospital Colorado, in a statement. “It’s very important for parents to promptly seek medical care if they notice any of these symptoms.”

Fox News’s Kayla Rivas contributed to this report.