The doctor found mild inflammation in the renal calyx during the examination.

calyx 是名词，来自希腊语，原意是"杯状物"。在解剖学中特指肾脏内部收集尿液的杯状结构，即"肾盏"。renal calyx指肾脏中连接肾乳头和肾盂的漏斗状结构，用于收集尿液。