Please select the eligibility criteria that correspond to the clinical trial below.
Title: Treatment of Perianal Fistulas in Crohn's Disease With Injection of Freshly Harvested Autologous Adipose Tissue
Brief Summary: Present study investigated the efficacy of injection of freshly collected autologous adipose tissue into perianal fistulas in patients with Crohn's disease. Adipose tissue collected by liposuction was injected into the perianal fistulas. Primary objective was complete clinical healing six months after treatment. Secondary objectives were reduced or ceased fistula secretion and complications to the treatment.


Options:
A: Inclusion Criteria:

The reference population will consist of patients with perianal fistulising Crohn´s disease refractory to at least one of the following treatments: antibiotics, immunosuppressants or anti-tumor necrosis factor (TNF). Naïve patients are excluded, and those patients refractory to antibiotics will represent less than 25% of the total recruited patients.

All of them must comply with the following inclusion criteria:

1. Signed informed consent.
2. Patients with Crohn's Disease (CD) diagnosed at least 6 months earlier in accordance with accepted clinical, endoscopic, histological and/or radiologic criteria.
3. Presence of complex perianal fistulas with a maximum of 2 fistulas (internal openings) and a maximum of 3 external openings, assessed by clinical assessment and MRI. Fistula must have been draining for at least 6 weeks prior to the inclusion. A complex perianal fistula is defined as a fistula that met one or more of the following criteria during its evolution:

   * High inter-sphincteric, trans-sphincteric, extra-sphincteric or supra-sphincteric.
   * Presence of ≥ 2 external openings (tracts).
   * Associated collections
4. Non-active or mildly active luminal CD defined by a CDAI ≤ 220.
5. Patients of either sex aged 18 years or older
6. Good general state of health according to clinical history and a physical examination.
7. For women of a childbearing age, they must have negative serum or urine pregnancy test (sensitive to 25 IU human chorionic gonadotropin (hCG)). Both men and women should use appropriate birth control methods defined by the investigator.

Exclusion Criteria:

1. Presence of dominant luminal active Crohn's disease requiring immediate therapy.
2. CDAI \>220.
3. Concomitant rectovaginal fistulas
4. Patient naïve to specific treatment for perianal fistulising Crohn's disease including antibiotics
5. Presence of an abscess or collections \> 2 cm, unless resolved in the preparation procedure (week -3 to day 0).
6. Presence of \> 2 fistular lesions.
7. Presence of \> 3 external openings.
8. Rectal and/or anal stenosis and / or active proctitis, if this means a limitation for any surgical procedure.
9. Patient who underwent surgery for the fistula other than drainage or seton placement.
10. Patient with diverting stomas
11. Patient with ongoing steroid treatment or treated with steroids in the last 4 weeks
12. Renal impairment defined by creatinine clearance below 60 ml/min calculated using Cockcroft-Gault formula or by serum creatinine ≥ 1.5 x upper limit of normality (ULN)
13. Hepatic impairment defined by both of the following laboratory ranges:

    * Total bilirubin ≥ 1.5 x ULN
    * Aspartate aminotransferase (AST) and alanine aminotransferase(ALT) ≥ 2.5 x ULN
14. Known history of abuse of alcohol or other addictive substances in the 6 months prior to inclusion.
15. Malignant tumour or patients with a prior history of any malignant tumour, including any type of fistula carcinoma.
16. Current or recent history of abnormal, severe, progressive, uncontrolled hepatic, haematological, gastrointestinal (except CD), endocrine, pulmonary, cardiac, neurological, psychiatric, or cerebral disease.
17. Congenital or acquired immunodeficiencies.
18. Known allergies or hypersensitivity to antibiotics including but not limited to penicillin, streptomycin, gentamicin, aminoglycosides; Human Serum Albumin (HSA); Dulbecco Modified Eagle's Medium (DMEM); materials of bovine origin; local anaesthetics or gadolinium (MRI contrast).
19. Contraindication to MRI scan, (e.g., due to the presence of pacemakers, hip replacements or severe claustrophobia).
20. Major surgery or severe trauma within the previous 6 months.
21. Pregnant or breastfeeding women.
22. Patients who do not wish to or cannot comply with study procedures.
23. Patients currently receiving, or having received within 3 months prior to enrolment into this clinical study, any investigational drug.
24. Patients previously treated with eASCs can not be enrol into this clinical study.
25. Subjects who need surgery in the perianal region for reasons other than fistulas at the time of inclusion in the study, or for whom such surgery is foreseen in this region in the 24 weeks after treatment administration.
26. Contraindication to the anaesthetic procedure.
B: Inclusion Criteria:

1. Patient with a complex perianal fistula. A complex perianal fistula must meet one of the following:

   * No fistula tract is palpated under the perianal skin or tract parallel to the rectum on examination with a stylet.
   * Associated anal incontinence in transsphincteric fistulas.
   * Risk factors for anal incontinence.
   * At least one prior surgery for a fistulous disease.
   * Suprasphincteric tracts shown by an image test.
2. Women of childbearing age should have a negative serum or urine pregnancy test (sensitive to 25IU of hCG) and not be lactating before study entry. Both men and women should use adequate birth control methods as defined by the investigator.
3. Seton presence is allowed at the time of study entry and until cells (in groups receiving ASCs) or Fibrin adhesive are implanted.
4. No condition that may prevent the patient from following the study procedures until 26 weeks of follow-up are completed is foreseen.
5. Patient should give his/her signed, written informed consent. -

Exclusion Criteria:

1. Patient has been diagnosed with IBD
2. Patient has a rectovaginal fistula
3. Patient is pregnant or lactating woman
4. Patient has acute sepsis at the time of study entry
5. A liposuction to draw at least 100 cc of fat from the abdominal wall is not technically feasible.
6. Patient needs surgery in the perianal region for reasons other than fistulas
7. Presence of two or more complex perianal fistulas
8. Patient has collections \> 2 cm in MRI. If such collections exist, the surgeon may perform a complete toilette of the area.
9. Patient is allergic to local anesthetics or Gadolinium (MRI contrast agent).
10. MRI is not technically feasible.
11. Patient has abused alcohol or other addictive substances within 6 months of study entry.
12. Patient has active or latent infection by HIV, HBV or HCV.
13. Patient has undergone major surgery or sustained a severe trauma, in the investigator's judgment, within 28 days of recruitment.
14. Patient is receiving or has received immunomodulatory treatment for reasons other than the fistula within 6 months of study entry.
15. Patient has a malignant tumour, except for basal or squamous cell carcinoma of the skin, or has a prior history of a malignant tumour, except if the tumour has been in remission for at least the past 5 years.

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C: Inclusion Criteria

1. Men and Women 18-75 years of age with a diagnosis of Crohn's disease for at least six months duration.
2. Single and Multi-tract Perianal fistula, with or without previous failed surgical repair.
3. Have no contraindications to MR evaluations: e.g. pacemaker or magnetically active metal fragments, claustrophobia
4. Ability to comply with protocol
5. Competent and able to provide written informed consent
6. Concurrent Crohn's-related therapies with stable doses (\>2 months) corticosteroids, 5- ASA drugs, immunomodulators, anti-TNF therapy, anti-integrin and anti-interleukin therapies are permitted

Exclusion Criteria

1. Inability to give informed consent.
2. Clinically significant medical conditions within the six months before administration of MSCs: e.g. myocardial infarction, active angina, congestive heart failure or other conditions that would, in the opinion of the investigators, compromise the safety of the subject.
3. Specific exclusions:

   1. Hepatitis B or C
   2. HIV
   3. Abnormal AST or ALT at screening(defined as \>/= 2x ULN)
4. History of cancer including melanoma (with the exception of localized skin cancers) within one year of screening.
5. History of colorectal cancer within 5 years
6. Investigational drug within one month of treatment
7. Pregnant or breast feeding or trying to become pregnant.
8. Presence of a rectovaginal or perineal body fistula
9. Change in Crohn's immunosuppressive regimen within the 2 months prior to enrollment
10. Uncontrolled intestinal Crohn's disease which will require escalation for medical therapy or surgery within 2 months of enrollment
11. Severe anal canal disease that is stenotic and requires dilation
12. Female participant unwilling to agree to use acceptable contraception methods during participation in study
D: Inclusion Criteria:

* Clinical diagnosis of Crohn´s Disease
* presence of complex Crohn´s Disease fistulas
* fistulas refractory to standard surgical intervention, including long-term seton and regular curettage, and/or medical treatment.

Exclusion Criteria:

- Fistulas developed following proctectomy were excluded.

Answer: D