Hot Doughnut Sign

The Hot Doughnut Sign is a medical imaging indicator seen in cases of severe acute cholangitis, a serious infection of the bile ducts. On imaging tests like CT scans or ultrasounds, it appears as a swollen, inflamed segment of the common bile duct with a uniform, doughnut-shaped appearance, resembling a hot doughnut. This sign signifies significant inflammation and swelling, often associated with pus or infection within the bile duct. Recognizing this sign helps healthcare providers diagnose and promptly treat the infection to prevent serious complications.