Keloids are smooth, hard growths that can form when scar tissue grows excessively. They aren't harmful, but they may be much larger than the original wound.
Burkitt's lymphoma is a relatively rare and aggressive form of non-Hodgkin lymphoma.
Rheumatic fever is a complication of strep throat. If it's left untreated, it can cause permanent damage to the heart. Find out about symptoms and treatment.
Valley fever is an infection caused by the Coccidioides fungus. Learn about valley fever symptoms, causes, treatment, prevention, and more.
Polyarteritis nodosa (PAN) is a serious but rare disease of the blood vessels caused by an immune system malfunction.
This feature is for informational purposes only and should not be used to diagnose. Please consult a healthcare professional if you have health concerns.