Gossypiboma

Gossypiboma or textiloma

Gossypiboma, textiloma or more retained foreign object (RFO) is the technical term for surgical complications resulting from foreign materials, such as a surgical sponge, accidentally left inside a patient's body.

The term "gossypiboma" is derived from the Latin gossypium (“cotton wool, cotton”) . "Textiloma" is derived from textile (surgical sponges have historically been made of cloth).

https://en.m.wikipedia.org/wiki/Gossypiboma