Sonography is helpful for categorizing a palpable inguinal mass. Most lymph nodes are ooid. They typically hae an echogenic central area and a hypoechoic peripheral zone (Figure 20 ).是什么意思_Sonography is helpful for categorizing a palpable inguinal mass. Most lymph nodes are ooid. They typically hae an echogenic central area and a hypoechoic peripheral zone (Figure 20 ).在线翻译_英语_读音_用法_例句