| umls-concept:C0334664 | skos:definition | CSP: nodular cutaneous mast cell infiltrate, which is usually present at birth or soon after as a solitary nodule, although three to four lesions may occur; lesions typical of urticaria pigmentosa may occur later.,NCI: A growth or lump of mast cells (a type of white blood cell). Mast cell tumors can involve the skin, subcutaneous tissue, and muscle tissue.,NCI: A neoplasm composed of mast cells, for which the malignancy status has not been determined.,NCI: A heterogeneous group of disorders characterized by the abnormal growth and accumulation of mast cells in one or more organ systems. Recent data suggest that most variants of mastocytosis are clonal disorders. (WHO, 2001) | lld:umls |
