On CT and MRI, the mass in the patient's colon looked like a malignant tumor. But when pathologists examined the tissue under a microscope, they did not find cancer.
Instead, they spotted Michaelis-Gutmann bodies, tiny layered mineral deposits that are the hallmark of malakoplakia, a rare inflammatory condition. The patient was treated with antibiotics, and two years later, follow-up imaging and endoscopy showed the mass had almost completely resolved.
