pitting 1216 pityriasis faces (often golds, solder joints, or amalgam). It cell closely related to neuroglia. [pituitary + G. kytos, cell] may arise from a variety of causes, although the clinical occurrence is often associated with cor- pi • tu • i • cy • to • ma (pi-t¯ u′i-s¯ ı-t¯ o′m˘ a) A rare gliog- rosion. SEE ALSO pitting edema, nail pits. enous neoplasm derived from pituicytes, occur- ring in the posterior lobe of the pituitary gland pit • ting e • de • ma (pit′ing ˘ e-d¯ e′m˘ a) Edema that and characterized by cells with small nuclei and retains for a time the indentation produced by long processes that form a network of cytoplas- pressure. See this page. mic material, in which droplets of fat may be demonstrated. [pituicyte + G. -oma, tumor] pi • tu • i • tar • ism (pi-t¯ u′i-tar-izm) Pituitary dys- function. SEE hyperpituitarism, hypopituitarism. pi • tu • i • tar • y (pi-t¯ u′i-tar-¯ e) Relating to the pitui- tary gland (hypophysis). [L. pituita, phlegm] pi • tu • i • tar • y ca • chex • i • a (pi-t¯ u′i-tar-¯ e k˘ a-kek′ s¯ e-˘ a) SYN Simmonds disease. pi • tu • i • tar • y di • ver • tic • u • lum (pi-t¯ u′i-tar-¯ e d¯ ı′ v˘ er-tik′y¯ u-l˘ um) SYN hypophysial diverticulum. pi • tu • i • tar • y dwarf • ism (pi-t¯ u′i-tar-¯ e dw¯ orf′ izm) A rare form of dwarfism caused by the absence of a functional anterior pituitary gland; may be present at birth or develop during early childhood. pi • tu • i • tar • y dys • to • pi • a (pi-t¯ u′i-tar-¯ e dis-t¯ o′ p¯ e-˘ a) Failure of union of neurohypophysis and adenohypophysis. pi • tu • i • tar • y gi • gan • tism (pi-t¯ u′i-tar-¯ e j¯ ı-gant′ izm) A form of gigantism caused by hypersecre- tion of pituitary growth hormone; a rare disorder commonly the result of a pituitary adenoma. pi • tu • i • tar • y gland (pi-t¯ u′i-tar-¯ e gland) SYN hy- pophysis. pi • tu • i • tar • y go • nad • o • tro • pic hor • mone (pi-t¯ u′i-tar-¯ e g¯ o-nad′ ¯ o-tr¯ o′pik h¯ or′m¯ on) SYN ante- rior pituitary gonadotropin. pi • tu • i • tar • y growth hor • mone (pi-t¯ u′i-tar-¯ e gr¯ oth h¯ or′m¯ on) SYN somatotropin. pi • tu • i • tar • y myx • e • de • ma (pi-t¯ u′i-tar-¯ e mik- s˘ e-d¯ e′m˘ a) A form of hypothyroidism resulting from inadequate secretion of the thyrotropic hor- mone; commonly occurs in association with in- adequate secretion of other anterior pituitary hor- mones. pi • tu • i • tar • y stalk (pi-t¯ u′i-tar-¯ e stawk) A pro- cess comprising the tuberal part investing the infundibular stem that attaches the hypophysis to the tuber cinereum at the base of the brain. pitting edema: (A) finger pressure is applied to area near ankle; (B) when pressure is released, indentation remains in edematous tissue A B pit • y • ri • a • sic (pit′i-r¯ ı-as′ik) Relating to or suf- Pitts • burgh pneu • mo • ni • a (pits′b˘ urg n¯ u-m¯ o′ fering from pityriasis. n¯ e-˘ a) A variant of Legionnaire’s disease caused by Legionella micdadei. pit • y • ri • a • sis (pit ′ i-r¯ ı ′ ˘ a-sis) A dermatosis marked by branny desquamation. [G., fr. pityron, Pitts • burgh pneu • mo • ni • a a • gent (pits′b˘ urg bran, dandruff] n¯ u-m¯ o′n¯ e-˘ a ¯ a′j˘ ent) SYN Legionella micdadei. pit • y • ri • a • sis al • ba (pit′i-r¯ ı′ ˘ a-sis al′b˘ a) Patchy pi • tu • i • cyte (pi-t¯ u′i-s¯ ıt) The primary cell of the hypopigmentation of the skin resulting from posterior lobe of the pituitary gland, a fusiform mild dermatitis.