anal fistula
Medical term for an abnormal tunnel between the anal canal and the skin near the anus.
Surgery is often necessary to treat an anal fistula.
Common simplified spelling using hiragana for 瘻.
Compound of 痔 (ji, 'hemorrhoids') and 瘻 (rō, 'fistula'). The kanji 瘻 is a medical character for an abnormal passage, and its reading ろう is sometimes written in hiragana as ろう.