A swollen, red leg usually means cellulitis, a common skin infection. But for one 72-year-old woman, that wasn't the whole story. Doctors describe her case in a new report: what looked like cellulitis turned out to be antisynthetase syndrome, a rare autoimmune condition that attacks muscles and lungs. The report is a single case, so it is a clue, not proof.
The woman had a swollen lower leg that looked infected. But she also had skin lesions, rising muscle enzymes, and lung problems. Those clues pointed away from infection and toward an inflammatory myopathy, a disease where the immune system attacks muscle. Doctors treated her with prednisone, mycophenolate mofetil, and nintedanib. After three months, her skin lesions cleared, her muscle enzymes nearly normalized, and her lung disease improved. Her pleural and pericardial effusions, extra fluid around the lungs and heart, decreased markedly.
She stopped one antibiotic, cefuroxime sodium, after five days. No other side effects were reported. But this is one person's experience. A case report cannot show that a treatment works for everyone, or even that it caused the improvement. It simply raises a flag: when atypical skin lesions come with high muscle enzymes and lung disease, doctors should think beyond infection. That is the real message here.
Common questions
What is antisynthetase syndrome?
It is a rare autoimmune disease that causes muscle weakness and lung problems. In this case, it also caused skin lesions that looked like an infection. Doctors consider it when someone has atypical skin findings along with high muscle enzymes and interstitial lung disease. It is not an infection, so antibiotics alone will not fix it.
How was this case treated?
The 72-year-old woman received prednisone, mycophenolate mofetil, and nintedanib. After three months, her skin lesions resolved, her muscle enzymes nearly normalized, and her lung disease improved. She also received cefuroxime sodium for five days, which was then stopped. This is one person's treatment, not a standard plan for everyone.
Was the treatment safe?
The report does not list any side effects from the main treatments. The only noted discontinuation was cefuroxime sodium, stopped after five days. Because this is a single case, safety information is very limited. Always talk with your doctor about the risks and benefits of any treatment for your situation.
What should I do if I have similar symptoms?
If you have unusual skin lesions along with muscle weakness or breathing problems, see your doctor. This case shows that a rare muscle disease can mimic a common infection. Only a doctor can tell the difference and decide what tests or treatments you need. Do not try to diagnose or treat yourself.
