Askanazy made contributions in the fields of hematology and parasitology, also conducting important research of bone pathology and the formation of tumors in humans. In 1898 he was the first scientist to describe Hürthle cells, and in 1904 he was the first to link osteitis fibrosa cystica with parathyroid tumors.[1] In 1921, he provided an early description of Schaumann bodies (kalkdrusen),[2] and two years later, he was the first to describe a gastric carcinoid tumor.[3]