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However, with advances in diagnostic techniques, the diagnosis of chloromas can be made more reliable. Traweek et al. described the use of a commercially available panel of monoclonal antibodies, against myeloperoxidase, CD68, CD43, and CD20, to accurately diagnose chloroma via immunohistochemistry and differentiate it from lymphoma. [8]
Erdheim–Chester disease (ECD) is an extremely rare disease characterized by the abnormal multiplication of a specific type of white blood cells called histiocytes, or tissue macrophages (technically, this disease is termed a non-Langerhans-cell histiocytosis).
Prognosis depends on the condition itself. Some conditions such as MS depend on the subtype of the disease and various attributes of the patient such as age, sex, initial symptoms, and the degree of disability the patient experiences. [14] Life expectancy in MS patients is 5 to 10 years lower than unaffected people. [15]
CD68 immunostaining demonstrating macrophages and giant cells in a case of xanthogranulomatous pyelonephritis CD68 ( C luster of D ifferentiation 68) is a protein highly expressed by cells in the monocyte lineage (e.g., monocytic phagocytes , osteoclasts ), by circulating macrophages , and by tissue macrophages (e.g., Kupffer cells , microglia ).
At presentation, 31 patients with CD8+ TLPD were 29–89 years old (average 52.1 years); 23 were male, 8 were female; 26 had nodules, 5 had plaques; 28 had a single lesion, 2 had bilateral lesions, and 1 had multiple lesions; 18 had a single lesion on the ear, 3 had a single lesion on the nose, 1 had a single lesion on the leg, 4 had a single lesion on the foot, 2 had a single lesion on the ...
Whereas patients with skin and a solitary lymph node involvement generally have a good prognosis. [49] Although there is a general good prognosis for Langerhans cell histiocytosis, approximately 50% of patients with the disease are prone to various complications such as musculoskeletal disability, skin scarring and diabetes insipidus. [49]
High magnification micrograph of giant cells in a giant-cell tumor of bone, H&E stain. The diagnosis of giant-cell tumors is based on biopsy findings. The key histomorphologic feature is, as the name of the entity suggests, (multinucleated) giant cells with up to a hundred nuclei that have prominent nucleoli.
Rosai–Dorfman disease, also known as sinus histiocytosis with massive lymphadenopathy or sometimes as Destombes–Rosai–Dorfman disease, [1] [2] [3] is a rare disorder of unknown cause that is characterized by abundant histiocytes in lymph nodes or other locations including the skin, sinuses, brain and heart.