Active brown adipose tissue helps maintain normal body temperature in newborn infants. It is believed that this tissue regresses with increasing age and is completely lost by the time a person ...

Multilocular cystic renal cell carcinoma is characterized by small aggregates of individual clear cells within the fibrous septa (sometimes resembling macrophages or lymphocytes surrounded by ...

A 72-year-old man developed a bluish, painless and rapidly enlarging lesion on the palm side of his ring finger, over the course of a few weeks. It was solid and 20 mm in diameter on examination ...