Primary Neoplasm

A progressive, chronic disease in which the bone marrow is replaced by fibrous tissue and blood is made in organs such as…

A brain region that is located in the dorsal part of the precentral gyrus.

A benign or malignant, circumscribed or diffuse neoplasm that arises from melanocytes in the leptomeninges. It includes diffuse melanocytosis, leptomeningeal melanoma,…

Thymic B cell.

An aggressive (fast-growing) type of B-cell non-Hodgkin lymphoma (cancer of the immune system). Primary mediastinal large B-cell lymphoma develops from B cells…

A malignant tumor at the original site of growth.