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Dilation, especially of a hollow organ.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



limited dilatation of the lumen of a hollow organ or blood vessel. Ectasia may be congenital, as in the case of bronchiectasis and telangiectasia. However, the condition occurs more often as a result of stenosis, above which the lumen of a hollow organ dilates. It is treated by surgery.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
This hypothesis is also consistent with the histological finding of proliferating ectatic vessels in the gastric mucosa and strongly supports our hypothesis of an evident proliferation stimulus of the increased portal blood flow on the gastric mucosa.
The success rate in terms of disease stabilization was 90% at 1 year and only 3 (10%) eyes exhibited continued ectatic progression.
Multiple ectatic and serpiginous anomalous vessels adjacent to the uterine wall bilaterally are appreciable at MR and CT imaging; these are indicated by white arrows in (a) and (b) and black arrows in (c) and (d).
have proposed that KC is a pan-corneal thinning disorder based on the corneal thinning appearance in the peripheral and central ectatic region [86].
A skin biopsy of 5 mm was carried out and the histopathology revealed a hyperkeratosis epidermis and ectatic vessels in the papillary and reticular dermis without lobular pattern.
Microscopic examination in a low power revealed the presence of numerous ectatic, variable-sized ducts interspersed in a fibrocellular connective tissue stroma (Figure 2).
Caption: Figure 1: Diffuse bowel wall thickening with polypoid appearance (long arrows) and ectatic vasa recta (short arrows) arewell demonstrable on coronal HASTE (a) and True-FISP (b) MR images as well as on axial True-FISP MR image (c).
The specimen demonstrated features consistent with a vascular neoplasm, most consistent with angioma including large ectatic vessels.
Coronary artery ectasia (CAE) is an abnormal dilatation of coronary arteries in which the ectatic segment exceeds the diameter of the normal adjacent segments or the diameter of the patient's largest coronary vessel by 1.5 times [1].
Presumably, salmon patches are composed of ectatic dermal capillaries that represent the persistence of fetal circulating patterns in the skin [2].