While some aspects of our health are more visible than others, many become evident through symptoms that we can see from the outside. That’s why organs such as our hair, skin and nails are so useful ...

Enlarging purple pruritic nodules on the dorsal neck One month after a painful neck rash, an HIV-positive man develops pruritic purple lesions at the same site. A 34-year-old African American man ...

A 7-year-old boy with no underlying conditions is brought to the emergency department (ED) by his mother for fever, sore throat, abdominal and neck pain, and rash. These symptoms started 6 days ago.