The goal of this Expanded Access Protocol is to provide expanded access of AVB-114 to patients who had their fat tissue collected as part of a clinical trial (STOMP-II), but who were subsequently not treated with AVB-114 because they did not meet all eligibility criteria or the investigational product was not successfully manufactured.

AVB-114 is an autologous investigational product under evaluation in Seeded Cells on Matrix Plug Treating Crohn's Perianal Fistulas (STOMP-II; a prospective, multicenter, randomized, blinded outcome assessment, controlled, add-on therapy phase II study) for the treatment of complex perianal fistulas in subjects with Crohn's disease. EAP-STOMP2 is an expanded access protocol for patients who had adipose tissue collected per the STOMP-II protocol, but who were subsequently unable to receive AVB-114 treatment due to screen failure or product manufacturing issues and thus withdrew from the study. Patients will receive AVB-114 as deemed appropriate by investigator and Avobis Bio.

Inclusion Criteria:

1. Provision of signed and dated ICF.
2. Adipose tissue previously collected per the STOMP-II protocol, but were subsequently unable to receive AVB-114 treatment due to screen failure or product manufacturing issues and thus withdrew.
3. Diagnosed with Crohn's disease and a target perianal fistula with one internal opening and at least one external opening.

Exclusion Criteria:

1. Suffer from any condition or illness that, in the opinion of the Investigator, would compromise patient safety.

2. Pregnant, trying to become pregnant, or are breast feeding. Women of childbearing potential (WCBP) and males who have sexual partners that are WCBP must agree to use an adequate method of contraception while participating in this EAP.

3. Known allergies or hypersensitivity to aminoglycosides.

4. History of clinically significant fat-directed autoimmunity.

5. Active, unresolved infection requiring parenteral antibiotics.

6. Unresolved abscess at time of treatment (if screening Pelvic MRI identifies an abscess, it must be resolved before treatment).

7. Target fistula with any of the following characteristics (note that presence of a second fistula tract that is distinctly separate from the target fistula, or a target fistula with a single internal opening and multiple external openings is not exclusionary):

   1. Target fistula has a branching blind ending sinus tract (no external opening) that investigator assesses to be at elevated risk of abscess formation if treated with AVB-114.
   2. Target fistula is a genito-urinary fistula, including rectovaginal (i.e., fistulae that transverse the vaginal canal).
   3. Any anatomical limitation to successfully securing the fistula plug disk.