pathologic proteins

par·a·pro·tein

(par'ă-prō'tēn), 1. A monoclonal immunoglobulin of blood plasma, observed electrophoretically as an intense band in γ, β, or α regions, due to an isolated increase in a single immunoglobulin type as a result of a clone of plasma cells arising from the abnormal rapid multiplication of a single cell. The finding of a paraprotein in a patient's serum indicates the presence of a proliferating clone of immunoglobulin-producing cells and may be seen in a variety of malignant, benign, or nonneoplastic diseases. 2. Synonym(s): monoclonal immunoglobulin [para + protein, fr. G. protos, first]

path·o·log·ic proteins

(path'ŏ-loj'ik prō'tēnz) Incomplete monoclonal immunoglobulin occurring in association with plasma cell disorders.
See also: paraprotein