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A lymphocyte is a type of white blood cell (leukocyte) in the immune system of most vertebrates. [1] Lymphocytes include T cells (for cell-mediated and cytotoxic adaptive immunity), B cells (for humoral, antibody-driven adaptive immunity), [2] [3] and innate lymphoid cells (ILCs; "innate T cell-like" cells involved in mucosal immunity and homeostasis), of which natural killer cells are an ...
Histopathology of diffuse large B-cell lymphoma occurring in the tonsil. H&E stain. Lymphoproliferative disorders (LPDs) refer to a specific class of diagnoses, comprising a group of several conditions, in which lymphocytes are produced in excessive quantities.
Secondary HLH in some individuals may be self-limited because patients can fully recover after having received only supportive medical treatment (i.e., IV immunoglobulin only). However, long-term remission without the use of cytotoxic and immune-suppressive therapies is unlikely in the majority of adults with HLH and in those with involvement ...
Chronic lymphocytic leukemia (CLL) is a type of cancer that affects the blood and bone marrow. [8] [9] In CLL, the bone marrow makes too many lymphocytes, which are a type of white blood cell. [8] [9] In patients with CLL, B cell lymphocytes can begin to collect in their blood, spleen, lymph nodes, and bone marrow.
Lymphopoiesis is now usually used interchangeably with the term "lymphocytopoiesis" – the making of lymphocytes, but some sources distinguish between the two, stating that "lymphopoiesis" additionally refers to creating lymphatic tissue, while "lymphocytopoiesis" refers only to the creation of cells in that tissue. It is rare now for ...
Lymphocytic esophagitis is a rare and poorly understood medical disorder involving inflammation in the esophagus. The disease is named from the primary inflammatory process, wherein lymphocytes are seen within the esophageal mucosa. Symptoms of the condition include difficulty swallowing, heartburn and food bolus obstruction. The condition was ...
Acute lymphoblastic lymphoma, acute lymphocytic leukemia: ALS Amyotrophic lateral sclerosis: AMD Age-related macular degeneration: AML Acute myelogenous leukemia: AN Anorexia nervosa: AOCD Anemia of chronic disease: AODM Adult onset diabetes mellitus: AOS Apraxia of speech: APA Aldosterone-producing adenoma: APS Antiphospholipid syndrome: ARBD
For lung involvement, the classic presentation is lymphocytic interstitial pneumonia which may be asymptomatic or present with fever, weight loss, chronic dry cough, or progressive exertional dyspnea (shortness of breath). [1] [3] [4] [5] On physical exam, a physician may note clubbing or crackles on pulmonary auscultation. [1]