hyperplasia

noun

Etymology: Etymology tree Proto-Indo-European *úp Proto-Indo-European *-er Proto-Indo-European *upér Proto-Hellenic *hupér Ancient Greek ῠ̔πέρ (hŭpér) Ancient Greek ῠ̔περ- (hŭper-)der. English hyper- Proto-Hellenic *plátʰyō Proto-Hellenic *pláťťō? Ancient Greek πλάσσω (plássō) Proto-Indo-European *-tis Ancient Greek -τις (-tis) Ancient Greek -σις (-sis) Ancient Greek πλᾰ́σῐς (plắsĭs)der. New Latin -plasiabor. English -plasia English hyperplasia From hyper- + -plasia.

1. An increase in the size of a tissue or organ due to increased number of cells.

   “But we can no longer regard the mere fact of these diffuse condensations of the lung becoming yellow and caseous as an evidence of their tuberculous nature, especially since the pathological anatomists, and among them Virchow, have shown that formations of the most different kind, having not the slightest connection with tubercule— as, for example, old cancerous masses, lymphatic glands swollen by a hyperplasia of cells, hæmorrhagical infarctions, abscesses, &c.— undergo exactly the same caseous transformation.”

   “[…] there has been recognition that porosity of the orbital roofs and cranial vault may arise due to a variety of different causes. These include rickets and scurvy, where it occurs due to different pathophysiological mechanisms[…]. In vitamin D deficiency, it arises as a result of deficient mineralization of the growing bone surface, in scurvy as a result of deposition of porous new bone and/or vascular inflammatory response; versus diploic hyperplasia coupled with resorption of overlying cortical bone in anemia.”