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The diagnostic utility of combined diffusion‐weighted imaging and conventional magnetic resonance imaging for detection and localization of non palpable undescended testes
Author(s) -
EmadEldin Sally,
AboElnagaa Nashwa,
Hanna Sameh AZ,
AbdelSatar Ayman H
Publication year - 2016
Publication title -
journal of medical imaging and radiation oncology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.31
H-Index - 43
eISSN - 1754-9485
pISSN - 1754-9477
DOI - 10.1111/1754-9485.12458
Subject(s) - medicine , magnetic resonance imaging , radiology , laparoscopy , diffusion mri , diagnostic accuracy , prospective cohort study , diffusion weighted magnetic resonance imaging , nuclear medicine , surgery
We aimed to evaluate the diagnostic performance of combined diffusion weighted imaging ( DWI ) and conventional magnetic resonance imaging ( MRI ), including fat‐suppression T2 WI for identification and localization of non palpable undescended testes ( UDT s). Methods This prospective study included 40 consecutive patients, with 47 non‐palpable undescended testes (unilateral in 33 cases and bilateral in seven cases). Their age ranged from 5 months to 18 years, mean = 7.5 ± 5.9 years. MRI examinations included T1 WI , T2 WI , fat‐suppression T2 WI and DWI at b value of 50, 400 and 800 s/mm 2 . All patients underwent laparoscopic exploration. Results According to the laparoscopy findings, the final diagnoses of the location of UDT s were: intra‐canalicular ( n = 18, 38%), low intra‐abdominal ( n = 6, 13%), high intra‐abdominal ( n = 5, 11%). Absent or vanishing testes were detected in 18 cases (38%). The diagnostic accuracy, sensitivity, specificity of combined DWI and conventional MRI were 95.7%, 93.5% and 100% respectively. Conclusion Combined DWI and MRI s howed a greater performance compared to conventional MRI alone for identification of non‐palpable UDT s. Based on our findings, we can obviate the need for diagnostic laparoscopy in patients who had preoperative detection of inguinal testes or nubbins. However, laparoscopy is still needed to confirm an absent rather than undetected non‐viable abdominal testes.