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All people with ALPS have signs of lymphoproliferation, which makes it the most common clinical manifestation of the disease. The increased proliferation of lymphoid cells can cause the size of lymphoid organs such as the lymph nodes and spleen to increase (lymphadenopathy and splenomegaly, present in respectively over 90% and over 80% of patients).
Reactive lymphocytes are usually associated with viral illnesses, but they can also be present as a result of drug reactions (such as phenytoin), immunizations, radiation, and hormonal causes (such as stress and Addison's disease), as well as some autoimmune disorders (such as rheumatoid arthritis). [7] Some pathogen-related causes include: [6]
Pioneering work by Noel Rose and Ernst Witebsky in New York, and Roitt and Doniach at University College London provided clear evidence that, at least in terms of antibody-producing B cells (B lymphocytes), diseases such as rheumatoid arthritis and thyrotoxicosis are associated with loss of immunological tolerance, which is the ability of an ...
Inflammatory arthritis can sometimes cause symptoms in parts of the body other than the joints, like the eyes, heart, or lungs. As arthritis progresses, joint damage can get worse.
Rarer causes which usually behave differently but may cause joint pains: [89] Sarcoidosis, amyloidosis, and Whipple's disease can also resemble RA. Hemochromatosis may cause hand joint arthritis. Acute rheumatic fever can be differentiated by a migratory pattern of joint involvement and evidence of antecedent streptococcal infection.
There is uncontrolled activation and proliferation of macrophages, and T lymphocytes, with a marked increase in circulating cytokines, such as IFN-gamma, and GM-CSF. The underlying causative event is unclear, and is the subject of ongoing research. In many cases of MAS, a decreased natural killer cell (NK-cell) function is found.
In adults, absolute lymphocytosis is present when the lymphocyte count is greater than 5000 per microliter (5.0 x 10 9 /L), in older children greater than 7000 per microliter and in infants greater than 9000 per microliter. [1] Lymphocytes normally represent 20% to 40% of circulating white blood cells. When the percentage of lymphocytes exceeds ...
SLE can cause pleuritic pain as well as inflammation of the pleurae known as pleurisy, which can rarely give rise to shrinking lung syndrome involving a reduced lung volume. [ 31 ] [ 32 ] Other associated lung conditions include pneumonitis , chronic diffuse interstitial lung disease , pulmonary hypertension , pulmonary emboli , and pulmonary ...