Distribution of Epididymal Involvement in XXXX .

@entity1 @entity4 @entity3892 @entity11570
OBJECTIVES: To evaluate characteristic sonographic findings for mumps @entity11570 with @entity3892 . METHODS: This study included 18 @entity1 (aged 12-18 years) with mumps @entity11570 . We assessed the volume, echogenicity, and vascularity of the testes and the transverse diameter, echogenicity, and vascularity of the epididymal head, body, and tail. We classified 4 types of @entity3892 : 1A, focal swelling of the epididymal head with hypervascularity only on the swollen head; 1B, focal swelling of the epididymal head with hypervascularity on the entire epididymis; 1C, @entity4 with hypervascularity; and 2, no @entity3892 . The Student t test was used to evaluate the significance of the size of each part of the epididymis and the epididymal head-to-tail diameter ratio. RESULTS: @entity11570 was unilateral in 13 @entity1 and bilateral in 5. Of 23 affected hemiscrotums, 7 (30.4%) were type 1A, 4 (17.4%) type 1B, 2 (8.7%) type 1C, and 10 (43.5%) type 2. In 11 @entity1 with unilateral @entity3892 , the mean diameters    SDs of the epididymal heads on the affected and contralateral sides were 1.11    0.19 (range, 0.7-1.7) and 0.65    0.14 (0.3-0.9) cm (significantly different, P <.001). The diameters of the epididymal tails on the affected and contralateral sides were 0.51    0.41 (0.2-0.8) and 0.46    0.21 (0.3-0.6) cm (not statistically different, P = .106). The mean head-to-tail ratios on the affected and contralateral sides were 2.28    0.49 (1.29-3.00) and 1.41    0.22 (1.00-1.75; significantly different, P < .001). In all types 1A and 1B, the ratio was higher than 2.00; in 22 of 23 unaffected epididymides, the ratio was lower than 2.00. CONCLUSIONS: Focal swelling of epididymal heads was a characteristic sonographic finding of @entity11570 , and a head-to-tail ratio higher than 2.00 can be a useful diagnostic finding.
