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histiocytosis with cytoplasmic accumulation of lipid, either phospholipid (Niemann-Pick disease) or glucocerebroside (Gaucher disease).
histiocytosis(his?te-o-si-to'sis) [ histiocyte + -osis]
An abnormal number of histiocytes in the blood.
Langerhans cell histiocytosis
Any of a number of clinical conditions, most commonly seen in infants and children, caused by disease of Langerhans cell histiocytes. These cells, which are characteristic of all of the variants of the disease, cause granulomas. The great variation in the signs and symptoms produced depends upon their location and how widely spread they are. Almost any organ system including the skeleton may be involved. These diseases were previously given names such as histiocytosis X, Hand-Schüller-Christian disease, Letterer-Siwe disease, and eosinophilic granuloma. Treatment may consist of surgical removal of bone lesions and radiation therapy for lesions threatening vital functions such as sight and hearing. Corticosteroids or cytotoxic agents are useful in controlling soft-tissue disease and multiple skeletal lesions. Bone marrow transplantation has been used in recurrent and progressive Langerhans cell histiocytosis.
lipid histiocytosisNiemann-Pick disease.
a condition marked by the abnormal appearance of histiocytes in the blood.
a benign proliferative disease in dogs, particularly Collies and Shetland sheepdogs. there are multiple plaques or nodules in the skin or subcutaneous tissue. The cause is unknown.
a systemic, progressive invasive proliferation of neoplastic histiocytes. Recognized as a familial disorder in Bernese mountain dogs with clinical signs of respiratory disease, involvement of the central nervous system, and anemia.
a proliferative disorder of histiocytes with infiltrates in the skin and lymph nodes. Occurs in young Bernese mountain dogs.