A portal in the knee is the small cut made by the surgeon during arthroscopy, to allow the passage of the instruments.

Standard portals marked on an arthroscopy training model.
Synonyms:
Keyholes
-
-
FORUM DISCUSSIONS
Remove arthroscopic portal "lumps" of scar tissue?
CLINICAL PUBLICATIONS
Arthroscopic removal of loose bodies using the accessory portals in the difficult locations of the knee: a case series and technical note. Chen B, Chen L, Chen H, Yang X, Tie K and Wang H. J Orthop Surg Res. 2018; 13: 258.