A review article and meta-analysis published in Eur Radiol, May 2018, showed — based on 16 studies analyzed in the meta-analysis — that the positive predictive value (PPV) was 85.6 % (95 % CI, 76.5–92.7 %) for diagnosing inguinal hernia without clinical signs.
The same study also showed that ultrasound was a good method for differentiating between inguinal and femoral hernias.
Source
Eur Radiol. 2018 May 14. doi: 10.1007/s00330-018-5489-9.
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