Hourglass Deformity

Cardiology A focal stenotic ring within large arteries, typical of supravalvular aortic stenosis accompanied by dilated sinus of Valsalva, seen by aortography
Management Dacron™ or pericardial patch
Imaging A finding by ‘barium swallow’ in patients with combined sliding and para-oesophageal hernia of the esophagogastric junction, where the ‘waist’ of the hourglass corresponds to constriction from the hiatal ring
Urology A congenital malformation of the urinary bladder in which there is incomplete transverse reduplication of the bladder; most cases occur in men and are clinically insignificant
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
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Two large, multicenter, double-blind, randomized, placebo-controlled, phase 3 clinical studies demonstrated that the use of collagenase is appropriate in Peyronie's disease when the following criteria were met: stable disease, curvature between 30[degrees] and 90[degrees], no hourglass deformity, no calcified plaque, plaque is not proximally located at the base of the penis, and normal erectile function (Gelbard et al., 2013; Levine et al, 2015).
Hourglass deformity of urinary bladder (arrows) was seen as a result of the compression of two extraperitoneal paravesical soft tissue bulky masses (asterisks) (Figure 1(a)).
You can see the hourglass deformity that has occurred from compression.
Such an overly aggressive operation can result in concurrent dorsal concavity (saddle-nose deformity) or a narrowing of the middle third of the nose (hourglass deformity).