HYPERPLASIA

(Lat.). n. f. Hip(hup)-u5r(ear)-pla(pla3)'zi- (si2)-a3. From vrrep, to exce , and irAao-is, formation. Fr., hyperplasie. Ger., Hyperplasie. It.,iperplasia.- A form of progre ive metamorphosis in which a part becomes enlarged or condensed by a numerical increase of its elements. [D.] Of. Numerical HYPERTROPHY. Areolar h. of the uterus. Of T. G. Thomas, exce ive growth of the connective ti ue of the uterus with congestion and resulting hyperaesthesia. [a, 40.] Fibrous (iii durative) h. of the lymphatic glands. A hyperplastic proce or condition the result of chronic or repeated inflammation. The glands become hardened and enlarged. By Ziegler two varieties the interstitial, or trabecular, and the diffuse, or reticular are distinguished. [D, 48.] Glandular h. Of Virchow, increase of the cellular elements without increase of the connective ti ue of a gland. H. cystic a vaginae. See COLPOHYPERPLASIA cystic a, H. of the hrain [Virchow]. Hypertrophy of the brain. [D, 70.] Inflammatory h. An exce ive growth or increase in one or more component elements of a part due to inflammation. It is usually the connective ti ue that is increased, [a, 40.] Large-celled (indurative) h. of the lymphatic glands. A chronic hyperplastic proce or condition in which there is a transformation of the gland-ti ue into a large-celled ti ue showing none of the characters of the original structure. It consists partly of closely packed, rounded, or polygonal cells, and partly of spindle cells, and may contain patches of fibrous ti ue. The lymph adenoid ti ue, if any remains, is seen in the form of reticulated bands which pervade the large-celled ti ues. [D, 48.] Leucsemic h. Splenic or lymphatic h. a ociated with leucaemia. [D, 48.] Lymphatic h. H. of more or fewer of the elements of the lymphatic system. It is a ociated either with leucaemia or with pseudoleucsemia. [D, 48.] Nodular h. (of the liver). Ah. of the liver in which there are hard nodules over the surface and throughout the substance of the organ due to atheroma of the arteries, [a, 40.] Pseudo leucaemic h. See Leucaemic h.. [s. 409]