Doctors are surprised by unexpected stowaway during routine colonoscopy: a ladybug.

Jacalyn Wetzel
Wed, 02 Jul 2025 20:11:04 +0000
Adventure, Bees, Cancer, Colonoscopy, Colonoscopy prep, Doctors, Enzymes, Intestine, Invasive species, Ladybug, Parasite, Polyps, Bug during colonoscopy, Colonoscopy surprises, Colonoscopy ladybug

Getting a colonoscopy is not something anyone looks forward to doing. You have to spend three days prepping for the procedure which includes drinking a "bowel preparation solution." That's just a fancy way of saying "taking an extremely powerful laxative that will have you lying on the bathroom floor too afraid to move because you finally expelled the gum you swallowed in third grade."

Doctors and their fancy words to describe gross things, am I right? But hey, everybody poops. There's even a book about it for parents to read to toddlers who are potty training. The purpose of spending two days counting the tiles your sweat drips onto in the bathroom is to clean out your colon before doctors insert a camera to look for polyps, cancer, and other medical conditions. But when a patient went in for their appointment, doctors discovered something they didn't expect to find: a stowaway that had, somehow, survived the tsunami of poo.

The patient was a 59 year old man who was being seen for a routine colonoscopy, the procedure where they take a small camera equipped with a light and send it up to traverse the colon and large intestine. It's a procedure that becomes part of a full preventative workup once you reach the age of 45 if you're at average risk for colon cancer according to MD Anderson Cancer Center (though doctors are now recommending colonoscopy screenings begin sooner due to rising cases of colon cancer in young people according to the Cancer Research Institute).

Urgent dash to the bathroom! ??♂?Photo credit: Canva

When the camera rounded the bend, it caught a clear sight of a perfectly intact ladybug who, despite the likely terror it experienced, was still alive.

The findings of the patient's friendly colon passenger was reported in the 2019 ACG Case Reports Journal complete with pictures of the spotted little fella just hanging out inside a human cavity. While the doctors have no way of determining how the ladybug wound up inside the man's body, they believe it was likely swallowed accidentally and escaped the wing destroying stomach acid due to the bowel preparation solution speeding up the process. The ladybug likely felt like it was on a weird waterslide or, if it's seen The Magic School Bus, it might have assumed Mrs. Frizzle had something to do with its unexpected adventure.

Ladybug unexpectedly found during colonoscopy Photo credit: The American College of Gastroenterology

“The patient's colonoscopy preparation was 1 gallon of polyethylene glycol the evening before colonoscopy, and the colonoscopy examination was otherwise normal,” the authors of the journal write. “His colonoscopy preparation may have helped the bug to escape from digestive enzymes in the stomach and upper small intestine.”

If you're going to have a bug hang out in your poop chute, a ladybug is likely the preferred unexpected guest. Gastrointestinal specialist Dr. Keith Siau likes to share the things he and his colleagues have found inside patients and a ladybug is probably the least gross option for critters. He's found ants, cockroaches, and bees (yes, bees that help pollinate flowers and sting people who disturb their important business).

Close-up of bottom of ladybug found in colon Photo credit: The American College of Gastroenterology

People cannot get over doctors finding bugs in people's colons during colonoscopies, while others have jokes about the random bugs found inside people. One person writes, "Oh, that’s just the magic school bus. They transformed into a lady bug for the field trip."

"Don’t take it out until you play the power ball," another says.

"Taking the title of invasive species a little far," somebody jokes.

— (@)

"So I already worry about bugs getting into my ears, now I gotta worry about bugs up my butt? I hate it here," another cries.

"I’ve always had a fear of ingesting a bug or parasite and them finding it one day. I know that’s crazy but I think about it often. Seeing this affirmed my fear of the unknown," someone else shares.

"I could have gladly lived the rest of my life without knowing this." one person writes.

Well, if you're due for your routine colonoscopy here's hoping they don't find any unauthorized critters and you get a clean bill of health.