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Lymphoid hyperplasia is the rapid proliferation of normal lymphocytic cells that resemble lymph tissue which may occur with bacterial or viral infections. [1] The growth is termed hyperplasia which may result in enlargement of various tissue including an organ, or cause a cutaneous lesion .
Follicular hyperplasia (FH) is a type of lymphoid hyperplasia and is classified as a lymphadenopathy, which means a disease of the lymph nodes. It is caused by a stimulation of the B cell compartment and by abnormal cell growth of secondary follicles .
Cutaneous lymphoid hyperplasia refers to a groups of benign cutaneous disorders characterized by collections of lymphocytes, macrophages, and dendritic cells in the skin. [ 2 ] : 725 Conditions included in this groups are: [ 2 ] : 725
In EBV+ T and NK cell-associated disease, the tissues affected by CAEBV usually exhibit an histology that is not suggestive of a malignancy: lymph nodes have areas of hyperplasia, focal necrosis, and small granulomas; spleen shows atrophy of white pulp with congested red pulp; liver contains infiltrations of small lymphocytes around portal ...
Unicentric Castleman disease is a subtype of Castleman disease (also known as giant lymph node hyperplasia, lymphoid hamartoma, or angiofollicular lymph node hyperplasia), a group of lymphoproliferative disorders characterized by lymph node enlargement, characteristic features on microscopic analysis of enlarged lymph node tissue, and a range of symptoms and clinical findings.
Lymphoproliferative disorders are a set of disorders characterized by the abnormal proliferation of lymphocytes into a monoclonal lymphocytosis.The two major types of lymphocytes are B cells and T cells, which are derived from pluripotent hematopoietic stem cells in the bone marrow.
Castleman diseases; Other names: Giant lymph node hyperplasia, lymphoid hamartoma, angiofollicular lymph node hyperplasia: Micrograph of Castleman disease showing hyaline vascular features including atrophic germinal center, expanded mantle zone, and a radially penetrating sclerotic blood vessel ("lollipop" sign).
Hyperplasia of the breast – "Hyperplastic" lesions of the breast include usual ductal hyperplasia, a focal expansion of the number of cells in a terminal breast duct, and atypical ductal hyperplasia, in which a more abnormal pattern of growth is seen, and which is associated with an increased risk of developing breast cancer.