In other cases this extreme result is not caused and fistulae are formed from which the ichor constantly flows.
Dioscorides says that fistulae may be dilated with sponge tents.
The ear probe seems to have been much used for probing wounds and fistulae when a very slender instrument was required.
"long, narrow ulcer," late 14c., from Latin fistula "pipe; ulcer," of uncertain origin.
fistula fis·tu·la (fĭs'chə-lə)
n. pl. fis·tu·las or fis·tu·lae (-lē')
An abnormal passage from a hollow organ to the body surface, or from one organ to another.