In some examples, an auxiliary port assembly may be configured to be coupled to a cover for providing a sealed space at a tissue site. The auxiliary port assembly may include an access portal and an adhesive. The access portal may include an exterior side and a mounting side opposite the exterior side. The mounting side may be configured to face the cover. The access portal may be configurable between an open state and a closed state, and may provide a passage through the cover in the open state. The adhesive may be configured to couple the mounting side of the access portal to the cover. Other systems, dressings, apparatuses, and methods are disclosed.