Cross-linked Hyaluronan Gel Reduces Rectal Toxicity Due to Radiation Therapy for Prostate Cancer

Cancer Center of Irvine10 enrolled

Overview

The primary purpose of this study is to determine if cross-linked hyaluronan gel reduces the dose of radiation delivered to the rectum and the rectal toxicity of radiotherapy for localized prostate cancer.

The main risk associated with transperineal injection of cross-linked hyaluronan gel into the anterior perirectal fat is infection. Prophylactic antibiotics will be given, resulting in a \<5% risk. Another possible risk (\<5%) is an allergic reaction such as itching. Patients who are allergic to avian products will be excluded from the study. Tenderness and pain at the injection site are possible. Bleeding, bruising, redness, or discoloration or the formation of a bump (granuloma) or scar (keloid) at the injection site is also possible. Embolization of cross-linked hyaluronan gel through the blood is a potential, rare complication if the gel is injected into a blood vessel rather than into fat. Prada et al. did not see any side effects related to the injection or the material itself in 27 patients based on a mean follow-up of 13 months (range: 9-22 months). Patients did not complain of pain, tenesmus, rectal pressure, or a sensation of rectal filling. Risks beyond 22 months are not well defined. Potential benefits of cross-linked hyaluronan gel include fewer rectal complications due to radiotherapy for early-stage prostate cancer.

Study Type

INTERVENTIONAL

Allocation

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Prostate Cancer

Interventions

Cross-linked hyaluronan gelDEVICE

Single, transperitoneal injection of 9 mL cross-linked hyaluronan gel into anterior perirectal fat under anesthesia. The gel is injected prior to the start of radiotherapy and is absorbed by the body over several months. It increases the seapartion between the prostate and rectum by 1/3" to 2/3" at the start of radiotherapy.

Eligibility

Sex: MALEMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: 1. Histologically-confirmed adenocarcinoma of the prostate, clinical stage T1c-T2c, NX, N0, M0. 2. Nodes determined to be negative by imaging methods will be classified as NX. Only nodes determined to be negative by surgical sampling will be classified as N0. 3. Prostate cancer biopsy grading by Gleason score classification is mandatory. 4. No prior pelvic radiotherapy. Induction hormonal therapy for less than or equal to 6 months is acceptable. 5. Prostate volume by TRUS \< 50 cc prior to HDR brachytherapy. 6. Prostate specific antigen (PSA) less than or equal to 30 ng/ml. 7. Patient has provided informed consent. Exclusion Criteria: 1. Clinical stage T3 or T4. 2. Clinical evidence of lymph node involvement (N1). 3. Clinical evidence of distant metastases (M1). 4. Radical surgery for carcinoma of the prostate. 5. Allergy to avian products. 6. Significant mental, medical, or physical impairment. 7. Prisoners. 8. Employees of the Cancer Center of Irvine.

Locations (1)

Cancer Center of Irvine

Irvine, California, United States

Outcomes

Primary Outcomes

Mean rectal dose without Hylaform vs with Hylaform

Time frame: 8 months

Secondary Outcomes

Severity of late diarrhea without Hylaform vs with Hylaform

Time frame: 33 months

Rectal wall relative V60 and V70 without Hylaform vs with Hylaform

Time frame: 8 months

Severity of acute diarrhea during IMRT without Hylaform vs with Hylaform

Time frame: 8 months

Data from ClinicalTrials.gov

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