155 / 492
08:03 - 08:06
S12-2
(PP)
★
ELASTOSONOGRAPHY OF THE CORPUS SPONGIOSUM IN HYPOSPADIC PENIS
Nicola ZAMPIERI, Federica BIANCHI, Marta PERETTI and Francesco CAMOGLIO
University of Verona, Policlinico G.B.Rossi, Department of Surgical Sciences, Pediatric Surgical Unit, University of
Verona,, Verona, ITALY
PURPOSE
The aim of this study is to apply the elastosonography on normal and hypospadic penis to verify the structural
differences in tissues composition and stiffness.
MATERIAL AND METHODS
56 subjects were enrolled, mean age 24 months: 34 patients with pre and post-operative follow-up for distal hypospadia
(6 months) and 22 age-matched subjects as control group. Elastosonography recorded antero-posterior and transverse
diameters of the cavernous corpora, urethral and corpus spongiosum diameters, elastographic index of elasticity of the
corpus spongiosum. The latter was defined as soft, medium-hard or hard. We assigned the value 1 to soft tissue, 2 and
3 to medium-hard and hard respectively.
All scan were performed at the base of the penis, as far as possible from the region involved in the surgical procedure.
RESULTS
Average antero-posterior and transverse diameters of the cavernous corpora were 4.2 mm (DS 0.83) and 6.5 mm (DS
1.12) for hypospadic group and 7.3 mm (DS 1.28) and 9.0 mm (DS 1.67) for control group. These data showed
statistically significant difference between the two groups for both the diameters (p<0.05).
Corpus spongiosum diameter was 1.9 (DS 0.33) for hypospadic group and 2.7 mm (DS 0.73) for control group
(p<0.05). post-operative value were significantly reduced but not in comparison with normal penis.
Elastography showed a corpus spongiosum stiffness defined as medium-hard or hard in all cases of the pathologic group
and soft in all the subjects of the control group (p<0.05).
No significant difference was found for urethra diameter between the two groups.
CONCLUSIONS
Elastosonography showed how the hypospadia anatomy is deeply altered, even in an anatomical area far from meatal
abnormality: avernous corpora are less developed and corpus spongiosum in hypospadic penis seems to be globally
stiffer and less elastic.