Sonographic evaluation of inguinal lesions.

Abnormalities in the inguinal region are varied. The most common abnormality in the inguinal region is the hernia: direct or indirect inguinal hernia and femoral hernia. There are many hernia-mimicking lesions, such as spermatic cord hydrocele, undescended testis, hematoma, inflammation, abscess, benign or malignant tumors, metastatic or benign lymph node enlargement, round ligament varicosities or mesothelial cyst, and herniated ovary. Ultrasonography is currently the primary imaging modality used in assessing inguinal lesions and helpful for the differential diagnosis of a broad spectrum of these diseases. Familiarity with clinical setting and certain ultrasonography details will facilitate prompt and accurate diagnosis and treatment.