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Distribution of Epididymal Involvement in Mumps Epididymo-orchitis.
J Ultrasound Med. 2015 Jun; 34(6):1083-9.JU

Abstract

OBJECTIVES

To evaluate characteristic sonographic findings for mumps orchitis with epididymal involvement.

METHODS

This study included 18 patients (aged 12-18 years) with mumps orchitis. 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 epididymal involvement: 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, diffuse swelling of the entire epididymis with hypervascularity; and 2, no epididymal involvement. 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

Orchitis was unilateral in 13 patients 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 patients with unilateral epididymal involvement, 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 mumps epididymo-orchitis, and a head-to-tail ratio higher than 2.00 can be a useful diagnostic finding.

Authors+Show Affiliations

Department of Diagnostic Radiology, Kyung Hee University Hospital, College of Medicine, Kyung Hee University, Seoul, Korea. indawn@hanafos.com.Department of Diagnostic Radiology, Kyung Hee University Hospital, College of Medicine, Kyung Hee University, Seoul, Korea.Department of Diagnostic Radiology, Kyung Hee University Hospital, College of Medicine, Kyung Hee University, Seoul, Korea.Department of Diagnostic Radiology, Kyung Hee University Hospital, College of Medicine, Kyung Hee University, Seoul, Korea.Department of Diagnostic Radiology, Kyung Hee University Hospital, College of Medicine, Kyung Hee University, Seoul, Korea.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26014328

Citation

Park, Seong Jin, et al. "Distribution of Epididymal Involvement in Mumps Epididymo-orchitis." Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine, vol. 34, no. 6, 2015, pp. 1083-9.
Park SJ, Kim HC, Lim JW, et al. Distribution of Epididymal Involvement in Mumps Epididymo-orchitis. J Ultrasound Med. 2015;34(6):1083-9.
Park, S. J., Kim, H. C., Lim, J. W., Moon, S. K., & Ahn, S. E. (2015). Distribution of Epididymal Involvement in Mumps Epididymo-orchitis. Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine, 34(6), 1083-9. https://doi.org/10.7863/ultra.34.6.1083
Park SJ, et al. Distribution of Epididymal Involvement in Mumps Epididymo-orchitis. J Ultrasound Med. 2015;34(6):1083-9. PubMed PMID: 26014328.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Distribution of Epididymal Involvement in Mumps Epididymo-orchitis. AU - Park,Seong Jin, AU - Kim,Hyun Cheol, AU - Lim,Joo Won, AU - Moon,Sung Kyoung, AU - Ahn,Sung Eun, PY - 2015/5/28/entrez PY - 2015/5/28/pubmed PY - 2016/3/2/medline KW - acute scrotum KW - epididymis KW - genitourinary ultrasound KW - orchitis KW - sonography KW - testis SP - 1083 EP - 9 JF - Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine JO - J Ultrasound Med VL - 34 IS - 6 N2 - OBJECTIVES: To evaluate characteristic sonographic findings for mumps orchitis with epididymal involvement. METHODS: This study included 18 patients (aged 12-18 years) with mumps orchitis. 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 epididymal involvement: 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, diffuse swelling of the entire epididymis with hypervascularity; and 2, no epididymal involvement. 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: Orchitis was unilateral in 13 patients 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 patients with unilateral epididymal involvement, 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 mumps epididymo-orchitis, and a head-to-tail ratio higher than 2.00 can be a useful diagnostic finding. SN - 1550-9613 UR - https://www.unboundmedicine.com/medline/citation/26014328/Distribution_of_Epididymal_Involvement_in_Mumps_Epididymo_orchitis_ L2 - https://doi.org/10.7863/ultra.34.6.1083 DB - PRIME DP - Unbound Medicine ER -