{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T11:32:37Z","timestamp":1790508757560,"version":"4.1.0"},"reference-count":29,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2017,12,7]],"date-time":"2017-12-07T00:00:00Z","timestamp":1512604800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Ultrasound Medicine"],"published-print":{"date-parts":[[2018,7]]},"abstract":"<jats:sec><jats:title>Objectives<\/jats:title><jats:p>To investigate the impact of preoperative ultrasonography (US) for detecting a viable testis in patients with a unilateral nonpalpable testis.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Patients with a unilateral nonpalpable testis or unilateral palpable undescended testis who underwent preoperative US were enrolled. Patients were divided into 3 groups as follows: nonpalpable testis\/no testis (n\u2009=\u200927), which included patients who had a unilateral nonpalpable testis with no viable testis detected at surgery; nonpalpable testis\/viable testis (n\u2009=\u200910), which included patients who had a unilateral nonpalpable testis with a viable testis identified at surgery; and palpable undescended testis (n\u2009=\u200963), which included patients who had a unilateral palpable undescended testis. Preoperative US findings were compared among each group.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The testicular volume on the contralateral descended side in the nonpalpable testis\/no testis group was significantly greater than that in the nonpalpable testis\/viable testis and palpable undescended testis groups. When a testicular volume of 0.54\u2009mL was used as the cutoff value, the sensitivity, specificity, positive predictive value, and negative predictive value for the presence of the affected testis were 75.3%, 100%, 100%, and 60.0%, respectively. The testis on the affected side was detected in none of the nonpalpable testis\/no testis group, 7 of the nonpalpable testis\/viable testis group, and all of the palpable undescended testis group. When a visible testis on the affected side and a testicular volume of 0.54\u2009mL or less were defined as positive, all patients in the nonpalpable testis\/viable testis and palpable undescended testis groups had positive findings versus none in the nonpalpable testis\/no testis group.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Preoperative US provides valuable information for predicting the presence of a viable testis in patients with a unilateral nonpalpable testis by estimating both the unaffected testis and the affected side.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jum.14509","type":"journal-article","created":{"date-parts":[[2017,12,7]],"date-time":"2017-12-07T05:09:26Z","timestamp":1512623366000},"page":"1665-1670","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Impact of Preoperative Ultrasonographic Evaluation for Detection of a Viable Testis in Patients With a Unilateral Nonpalpable Testis"],"prefix":"10.1002","volume":"37","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6161-9403","authenticated-orcid":false,"given":"Kimihiko","family":"Moriya","sequence":"first","affiliation":[{"name":"Department of Renal and Genitourinary Surgery Hokkaido University Graduate School of Medicine Sapporo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michiko","family":"Nakamura","sequence":"additional","affiliation":[{"name":"Department of Renal and Genitourinary Surgery Hokkaido University Graduate School of Medicine Sapporo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoko","family":"Nishimura","sequence":"additional","affiliation":[{"name":"Department of Renal and Genitourinary Surgery Hokkaido University Graduate School of Medicine Sapporo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mutsumi","family":"Nishida","sequence":"additional","affiliation":[{"name":"Diagnostic Center for Sonography and Division of Laboratory and Transfusion Medicine Hokkaido University Hospital Sapporo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yusuke","family":"Kudo","sequence":"additional","affiliation":[{"name":"Diagnostic Center for Sonography and Division of Laboratory and Transfusion Medicine Hokkaido University Hospital Sapporo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yukiko","family":"Kanno","sequence":"additional","affiliation":[{"name":"Department of Renal and Genitourinary Surgery Hokkaido University Graduate School of Medicine Sapporo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takeya","family":"Kitta","sequence":"additional","affiliation":[{"name":"Department of Renal and Genitourinary Surgery Hokkaido University Graduate School of Medicine Sapporo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masafumi","family":"Kon","sequence":"additional","affiliation":[{"name":"Department of Renal and Genitourinary Surgery Hokkaido University Graduate School of Medicine Sapporo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nobuo","family":"Shinohara","sequence":"additional","affiliation":[{"name":"Department of Renal and Genitourinary Surgery Hokkaido University Graduate School of Medicine Sapporo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2017,12,7]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.juro.2014.05.005"},{"key":"e_1_2_6_3_1","unstructured":"Tekg\u00fclS DoganHS ErdemE et al.Guidelines on paediatric urology. 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