A 20-year old man in Taiwan went to a dermatology clinic for a strange rash that had developed across his shoulders and chest. The raised, red, and itchy condition had been bothering him for a full month. By this point, he had also developed patches of pigmented skin interlaced with the red rash.

According to a case report in the New England Journal of Medicine, a skin biopsy showed swelling between his skin cells and inflammation around blood vessels, but testing came up negative for other common signs of skin conditions, leaving doctors with few leads. The doctors ultimately came to a diagnosis not by analyzing his skin further but by hearing about his diet.

The man's chest and shoulders, showing his rash and hyperpigmentation. Credit: New England Journal of Medicine, 2026

The man told doctors that two months prior to his clinic appointment—a month before his rash developed—he had switched to a ketogenic diet, which is a high-fat but very low-carbohydrate eating pattern. This diet forces the body to shift from using glucose (sugar derived from carbohydrates) as an energy source to fat instead.

Read full article

Comments

© New England Journal of Medicine, 2026

A generally healthy 63-year-old man in the New England area went to the hospital with a fever, cough, and vision problems in his right eye. His doctors eventually determined that a dreaded hypervirulent bacteria—which is rising globally—was ravaging several of his organs, including his brain.

According to the man, the problems started three weeks before his hospital visit, when he said he ate some bad meat and started vomiting and having diarrhea. Those symptoms faded after about two weeks, but then new problems began—he started coughing and having chills and a fever. His cough only worsened from there.

At the hospital, doctors took X-rays and computed tomography (CT) scans of his chest and abdomen. The images revealed over 15 nodules and masses in his lungs. But that's not all they found. The imaging also revealed a mass in his liver that was 8.6 cm in diameter (about 3.4 inches). Lab work pointed toward an infection, so doctors admitted him to the hospital and provided oxygen to help with his breathing, as well as antibiotics. But his chills and cough continued.

Read full article

Comments

© NEJM 2026

A generally healthy 63-year-old man in the New England area went to the hospital with a fever, cough, and vision problems in his right eye. What his doctors eventually figured out was that a dreaded hypervirulent bacteria—which is rising globally—was ravaging several of his organs, including his brain.

According to the man, the problems had started three weeks before his hospital visit, when he said he ate some bad meat and started having vomiting and diarrhea. Those symptoms faded after about two weeks, but then new problems began; he started coughing and having chills and a fever. His cough only worsened from there.

At the hospital, doctors took X-rays and computed tomography (CT) scans of his chest and abdomen. The images revealed over 15 nodules and masses in his lungs. But, that's not all they found. The imaging also revealed a mass in his liver that was 8.6 cm in diameter (about 3.4 inches). Lab work pointed toward an infection. So, doctors admitted him to the hospital and provided oxygen to help with his breathing, as well as antibiotics. But his chills and cough continued.

Read full article

Comments

© NEJM 2026