The genus Aesculus comprises 13-19 species of woody Trees and Shrubs native to the temperate northern hemisphere (with 6 species native to North America and 7-13 species native to Eurasia). There are also several hybrids.
Lymphoma is a form of cancer that affects the immune system-specifically, it is a cancer of immune cells called lymphocytes, a type of white blood cell. There are two broad types of lymphoma and many subtypes. The two types of lymphoma are described as: Hodgkin's or non-Hodgkin's.
A lymphoma is a cancer that typically starts in a lymph node, which is part of the immune system. However, it can also start in the colon or rectum. There are different kinds of lymphomas. In general, lymphomas fall into two categories - Hodgkin disease and non-Hodgkin lymphoma.