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The 2016 National Comprehensive Cancer Network (NCCN) Guidelines for prostate cancer support daily prostate localization by means of an endorectal balloon to enhance accuracy of treatment, reduce side effects, and improve cure rates (8).

Prostate Caddy™

Prostate immobilization for 3DCRT, IMRT, IGRT, SBRT, and Proton Therapy

Make Prostate Immobilization Simple.

Clinical Benefits

Immobilize the Prostate During Treatment

Prostate Caddy™ can help minimize prostate movement during treatment. The use of these devices is associated with reduced prostate motion and stabilized prostate displacement during the treatment course (4).

Maintain Consistency Between Treatments

Prostate Caddy™ supports reproducible results when used with a consistent fill volume and insertion depth over the treatment course. Daily rectal balloon use reduces prostate movement in between treatments, maintains anterior rectal wall position, and supports a reduced rectal margin through proper immobilization (2).

Minimize Rectum Exposure

Prostate Caddy™, when properly positioned and inflated, separates the posterior rectal mucosa. Rectal balloon use reduces the rectal wall volume exposed to doses greater than 40 Gy (1)(3)(7) and associated late toxicity.

Facilitate the Use of Modern Regimens

Hypofractionated treatments and dose escalation benefit from the use of rectal balloons (5)(7).

Device Features

Patient Compliance

Historically, larger and wider rectal balloons are associated with discomfort and poor compliance (6). The smaller design of Prostate Caddy™ keeps discomfort to a minimum.

Reduce Prostate Distortion

Traditional rounded balloon designs push the anterior rectal mucosa against the prostate and compress the prostate/rectum interface. Prostate Caddy™ has a patented longitudinally symmetric barrel-shaped design that reduces anatomical distortion of the prostate interface.

Atraumatic Insertion

Rounded atraumatic tip and improved room temperature stiffness facilitate insertion. The thermo-sensitive polymer of the central lumen maximizes comfort and conforms to the patient’s anatomy.


Prostate Caddy™ has depth markings along the central lumen and a 2-way locking stopper to secure the insertion depth of the balloon for day-to-day consistency. This device also comes equipped with a reliable inflation/deflation valve with luer lock connection to facilitate reproducible inflation volume.

For Radiation Therapists



For Dosimetrists




1: van Lin EN, Kristinsson J, Philippens ME, de Jong DJ, van der Vight LP, Kaanders JH, Leer JW, Visser AG. Reduced late rectal mucosal changes after prostate three-dimensional conformal radiotherapy with endorectal balloon as observed in repeated endoscopy. Int J Radiat Oncol Biol Phys. 2007 Mar 1; 67(3): 799-811. Epub 2006 Dec 8.

2: Wachter S, Gerstner N, Dorner D, Goldner G, Colotto A, Wambersie A, Potter R. The influence of a rectal balloon tube as internal immobilization device on variations of volumes and dose-volume histograms during treatment course of conformal radiotherapy for prostate. Int J Radiat Oncol Biol Phys. 2002 Jan 1; 52(1): 91-100.

3: Jackson A, Skwarchuk MW, Zelefsky MJ, Cowen DM, Venkatraman ES, Levegrun S, Burman CM, Kutcher GJ, Fuks Z, Liebel SA, Ling CC. Late rectal bleeding after conformal radiotherapy of prostate cancer. II. Volume effects and dose-volume histograms. Int J Radiat Oncol Biol Phys. 2001 Mar 1; 49(3): 685-98.

4: First Prospective Study to Determine the Role of Daily Endorectal Balloon on Prostate Intrafraction Motion Management during External Beam Radiotherapy. S. Both, K. Wang, J. Plastaras, C. Deville, V. Bar Ad, Z. Tochner, N. Vapiwala. International journal of radiation oncology, biology, physics 1 November 2010 (volume 78 issue 3 Page S669 DOI: 10.1016/j.ijrobp.2010.07.156).

5: Miralbell R, Molla M, Rouzaud M, Hidalgo A, Toscas JI, Lozano J, Sanz S, Ares C, Jorcano S, Linero d, Escude L. Hypofractionated boost to the dominant tumor region with intensity modulated stereotactic radiotherapy for prostate cancer: a sequential dose escalation pilot study. Int J Radiat Oncol Biol Phys. 2010 Sep 1; 78(1): 50-7. Epub 2009 Nov 10.

6: Ronson BB, Yonemoto LT, Rossi CJ, Slater JD. Patient tolerance of rectal balloons in conformal radiation treatment of prostate cancer. Int J Radiat Oncol Biol Phys. 2006 Apr 1; 64(5): 1367-70. Epub 2006 Feb 20.

7: Hanks GE, Schultheiss TE, Hanlon AL, Hunt M, Lee WR, Epstein BE, Coia LR. Optimization of conformal radiation treatment of prostate cancer. Int J Radiat Oncol Biol Phys. 1997 Feb 1; 37(3): 543-50.

8: Mohler, J. L., Armstrong, A. J., Bahnson, R. R., D’Amico, A. V., Davis, B. J., Eastham, J. A., . . . Tward, J. (2016). NCCN guidelines version 3.2016: prostate cancer. NCCN Clinical Practice Guidelines in Oncology. Retrieved from