aplasia

aplasia

 [ah-pla´zhah]

defective development or complete absence of an organ due to failure of development of the embryonic tissues or cells. 2. a hematologic disorder in which the normal progression of cell generation and development does not occur.

a·pla·si·a

(ā-plā'zē-ă),

1. Defective development or congenital absence of an organ or tissue.

2. In hematology, incomplete, retarded, or defective development, or cessation of the usual regenerative process.

[G. a- priv. + plasis, a molding]

aplasia

/apla·sia/ (ah-pla´zhah) lack of development of an organ or tissue.aplas´tic

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aplasia axia´lis extracortica´lis conge´nita  familial centrolobar sclerosis.

aplasia cu´tis conge´nita  localized failure of development of skin, most commonly of the scalp; the defects are usually covered by a thin translucent membrane or scar tissue, or may be raw, ulcerated, or covered by granulation tissue; usually lethal.

aplasia

(ə-plā′zhə)

n.

Defective development resulting in the absence of all or part of an organ or tissue.

aplasia

[əplā′zhə]

Etymology: Gk, a, plassein, not to form

1 a developmental failure resulting in the absence of an organ or tissue.

2 (in hematology) a failure of the normal process of cell generation and development in the bone marrow. See also aplastic anemia.Compare hyperplasia,hypoplasia. aplastic, adj.

aplasia

Absence of tissue or organ development.

aplasia

Absence of tissue or organ development. See Pure red cell aplasia, Pure white cell aplasia. Cf Atrophy, Hypoplasia.

a·pla·si·a

(ă-plā'zē-ă)

1. Defective development or congenital absence of an organ or tissue.

2. hematology Incomplete, retarded, or defective development, or cessation of the usual regenerative process.

[G. a- priv. + plasis, a molding]

aplasia

Failure of the development of an organ or tissue or its congenital absence.

aplasia

the failure of all or part of a tissue or organ to develop.

aplasia

defective development or congenital absence of an organ or tissue

a·pla·si·a

(ă-plā'zē-ă)

Defective development or congenital absence of an organ or tissue.

[G. a- priv. + plasis, a molding]

aplasia (əplā´zhə),

n a lack of origin or development (e.g., aplasia of dentition associated with ectodermal dysplasia).

aplasia of dentition,

n See anodontia.

aplasia

defective development or complete absence of an organ or tissue due to failure of development.

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aplasia cutis

see epitheliogenesis imperfecta.

pure red cell aplasia

selective depression of erythropoiesis with anemia resulting.

segmental aplasia

aplasia of a segment of an organ, e.g. uterus.