Lymphoproliferative
Referring to the proliferation of the bone marrow cells that give rise to lymphoid cells (such as lymphocytes and plasma cells) and reticuloendothelial cells (such as macrophages, which engulf foreign particles). The term lymphoproliferative is in contrast to myeloproliferative which refers to proliferation of bone marrow elements from which come red cells, granulocytes, and platelets. Both terms — lymphoproliferative and myeloproliferative — can apply to conditions that are entirely benign, premalignant, or frankly malignant.
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- Lymphoproliferative disorders
Malignant diseases of the lymphoid cells and of cells from the reticuloendothelial system that usually occur in people with compromised immune systems, such as patients with AIDS and recent transplant patients. Lymphoproliferative disorders can be associated with Epstein-Barr virus infection. See also Epstein-Barr virus.
- Lymphoreticulosis, benign
Cat scratch disease, a mild flu-like infection, with swollen lymph nodes (lymphadenitis) and mild fever of short duration, due to cat scratches, especially from kittens. There is usually a little bump (a papule) which may be pus-filled (a pustule) at the site of the scratch. The infection is self-limited and usually goes away by itself […]
- Lynch syndrome
Hereditary nonpolyposis colon cancer.
- Lyonization
The inactivation of an X chromosome. One of the two X chromosomes in every cell in a female is randomly inactivated early in embryonic development. Named after geneticist Mary Lyon.
- Lyophilization
A process by which material is rapidly frozen and dehydrated under high vacuum.