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Certain lymphomas (extranodal NK/T-cell lymphoma, nasal type and type II enteropathy-associated T-cell lymphoma) can be mimicked by two benign diseases that involve the excessive proliferation of nonmalignant NK cells in the GI tract, natural killer cell enteropathy, a disease wherein NK cell infiltrative lesions occur in the intestine, colon ...
It may be the site of lymphomas, usually a non-Hodgkin lymphoma. A specific entity is the marginal zone B-cell lymphoma (a subtype of which is termed MALT lymphoma). Certain subtypes of marginal zone B cell lymphomas such as those occurring in the stomach are commonly caused by Helicobacter pylori infection. [4]
Extranodal marginal zone lymphomas (EMZLs) are a form of MZL [9] in which malignant marginal zone B-cells initially infiltrate MALT tissues of the stomach (50-70% of all EMZL) or, less frequently, the esophagus, small intestine, large intestine, rectum, conjunctiva of the eye, nasal passages, pharynx, lung bronchi, vulva, vagina, skin, breast, thymus gland, meninges (i.e. membranes) that ...
It is to be distinguished from two other primary cutaneous lymphomas that involve B-cells, primary cutaneous follicle center lymphoma (PCFCL) and primary cutaneous marginal zone lymphoma (PCMZL), [8] as well as from a B-cell lymphoma that at diagnosis may appear to be limited to the skin but often is a systemic disease affecting numerous organs ...
Cutaneous lymphoma, also known as lymphoma cutis, is when lymphoma involves the skin. [1] It is characterized by a proliferation of lymphoid tissue. [2] There are two main classes of lymphomas that affect the skin: [citation needed] Cutaneous T-cell lymphoma; Cutaneous B-cell lymphoma
BPDCN usually (i.e. 61% [5] to 90% [8] of cases) presents with skin lesions, i.e. nodules, tumors, red or purple papules, bruise-like patches, and/or ulcers that most often occur on the head, face, and upper torso. [2] The lesions are due to diffuse infiltrations of the skin by malignant pDC.
T-cell/histiocyte-rich large B-cell lymphoma (THRLBCL) is a DLBCL in which tumors containing small numbers of usually large neoplastic B-cells embedded in a background of reactive T-cells and histiocytes develop in the liver, spleen, bone marrow and/or, rarely other sites. Patients usually present with advanced disease; their overall 3 year ...
The myeloid cell line normally produces granulocytes, erythrocytes, thrombocytes, macrophages and mast cells; the lymphoid cell line produces B, T, NK and plasma cells. Lymphomas, lymphocytic leukemias, and myeloma are from the lymphoid line, while acute and chronic myelogenous leukemia, myelodysplastic syndromes and myeloproliferative diseases ...