A newly published systematic review adds to a growing body of peer-reviewed research on the technology behind Himplant®, the FDA-cleared cosmetic penile implant.
A comprehensive scientific review published on October 5, 2026, in the International Journal of Impotence Research, a Springer Nature journal, has brought renewed attention to the clinical evidence supporting silicone sleeve penile augmentation.
The review examined 12 published clinical reports involving the implant technology developed by International Medical Devices, Inc. (IMD), documenting measurable increases in flaccid penile dimensions and evaluating reported surgical outcomes.
For Himplant®, the findings contribute to an established body of research that spans years of clinical development, published studies, and experience with thousands of procedures.
Importantly, the review also provides context for understanding newer Himplant-specific publications, including studies exploring cosmetic enhancement and selected reconstructive applications.
What Did the New 2026 Scientific Review Find?
The systematic review, titled Subcutaneous Penile Silicone Sleeve Implants for Penile Augmentation: A Systematic Review and Meta-Analysis, analyzed clinical research published between 2018 and 2026.
Its primary quantitative analysis found measurable postoperative increases in penile dimensions:
- Flaccid penile girth: 3.77 cm (1.48 inches) average reported increase.
- Flaccid penile length: 2.94 cm (1.16 inches) average reported increase.
These pooled estimates were derived from historical studies of IMD's earlier-generation Penuma implant, the predecessor to today's Himplant®. The review also evaluated newer Himplant-specific publications separately.
The researchers concluded that the available studies document increased flaccid penile dimensions following implantation, while emphasizing the need for larger prospective studies and standardized long-term follow-up.
The findings provide additional scientific context for an approach to penile enhancement that has been the subject of clinical research for years.
Newer Himplant Studies Provide Additional Clinical Evidence
While the 2026 meta-analysis brings together historical clinical data, several individual peer-reviewed publications specifically identify and evaluate Himplant®.
These studies offer additional insight into the clinical applications of the technology and the outcomes reported in selected patient populations.
2025: Himplant Study Reports Increased Penile Length and Girth
A study published online in July 2025 in the International Journal of Impotence Research evaluated Himplant in 12 patients with adult acquired buried penis.
The research involved physicians including Dr. James Elist, Dr. Kambiz Tajkarimi, and Dr. Adam De Fazio.
The researchers reported:
- 3.52 cm (1.39 inches) average increase in flaccid dorsal penile length.
- 2.78 cm (1.09 inches) average increase in midshaft girth.
- No penile infections, skin erosions, or implant removals among the 12 participants during the reported follow-up.
- Improved self-confidence reported by six of seven patients who responded to the follow-up questionnaire.
Notably, the reported average increase in flaccid length exceeded the 2.94 cm pooled estimate from the broader 2026 review.
Because the studies involved different patient populations and clinical objectives, this observation is not evidence of superiority or a predicted result for routine cosmetic patients.
Nevertheless, the findings provide encouraging additional evidence of measurable dimensional changes with Himplant in a selected clinical population.
What Makes Himplant Different From Other Cosmetic Penile Implants?
Not all cosmetic penile implants are the same, and clinical research involving one device should not automatically be applied to another.
Himplant® is an FDA-cleared medical device manufactured by International Medical Devices, Inc.
Developed in California, Himplant has evolved through successive generations of implant design and surgical technique.
Today, the procedure uses a pre-formed medical-grade silicone implant positioned beneath the penile skin, with implantation performed through a scrotal approach.
Himplant's development is supported by several important elements:
FDA clearance: IMD's preformed penile silicone implant technology has received FDA 510(k) clearance, including clearance for cosmetic augmentation of the penis.
Published clinical research: Multiple peer-reviewed publications have evaluated the manufacturer's implant technology, including studies specifically identifying Himplant.
Extensive clinical experience: According to IMD's reported surgical experience, more than 5,000 procedures have been performed across the technology's development and product generations.
Specialized physician training: Himplant is performed through a network of physicians trained in the procedure, with surgical education and clinical support coordinated by IMD.
Continued development: The implant and surgical approach have evolved over time, reflecting ongoing efforts to refine the procedure.
Together, these characteristics establish a distinct clinical and regulatory history for Himplant.
Does the 2026 Review Apply to Every Silicone Penile Implant?
No. The results of this review should not be interpreted as evidence supporting every cosmetic penile implant on the market.
Although the review discusses the broader medical category of subcutaneous penile implant (SPI) or subcutaneous silicone sleeve implants, its clinical evidence comes from studies of Penuma/Himplant product lineage.
The analysis did not establish clinical results, complication rates, or regulatory status for unrelated proprietary implant products.
Different implants may vary in their designs, materials, surgical techniques, clinical evidence, and regulatory status.
A published result involving Himplant technology cannot be assumed to apply to a different manufacturer's device simply because both are described as silicone penile implants.
Patients and physicians evaluating any implant should examine the evidence and applicable regulatory clearances for that specific product.
What Does the Research Tell Us About Safety?
The 2026 review evaluated postoperative complications alongside dimensional outcomes.
Its historical pooled estimates included infection, seroma, implant erosion or exposure, revision surgery, and implant removal. The reported rates varied between studies, and the authors emphasized limitations in study design, outcome definitions, and follow-up.
The review did not calculate separate pooled complication rates for today's Himplant device.
More recent Himplant publications have reported favorable outcomes in selected small patient groups. For example, the 12-patient buried-penis study published in 2025 reported no penile infection, erosion, or implant removal during its follow-up period.
These findings are encouraging, but small studies cannot establish the complication rates that should be expected across a broader patient population.
Careful patient selection, appropriate surgical training, informed consent, and postoperative care remain essential components of any cosmetic implant procedure.
Himplant: Building on an Established Clinical Foundation
The development of Himplant reflects years of innovation in cosmetic penile augmentation.
From the original implant technology to today's Himplant design and expanding network of trained physicians, IMD has continued to advance implant-based penile enhancement.
The new 2026 scientific review reinforces the importance of evaluating this technology through published clinical evidence.
It also helps distinguish an established medical device with documented clinical research from the broader category of cosmetic penile enhancement procedures.
With FDA clearance, thousands of procedures reported across the product lineage, and a growing collection of peer-reviewed publications, Himplant has developed a substantial clinical and regulatory foundation.
Further prospective research will be important for evaluating the outcomes of current-generation Himplant procedures in larger populations.
Frequently Asked Questions About Himplant Clinical Research
Is Himplant scientifically studied?
Yes. Himplant and its underlying implant technology have been evaluated in peer-reviewed medical publications. A 2026 systematic clinical reports, including historical studies and more recent Himplant-specific research.
Does Himplant actually increase penile size?
Published studies involving IMD's silicone sleeve implant technology have documented measurable increases in flaccid penile girth and length. More recent Himplant-specific case series also report positive dimensional changes in selected patient populations. Results vary, and no individual outcome is guaranteed.
Is Himplant the same as Penuma?
No. Penuma was an earlier-generation implant developed by International Medical Devices, Inc. Himplant is the successor and current product, incorporating subsequent changes in device design and surgical technique. Penuma is no longer the marketed product. Historical findings remain relevant to the development of the technology and outcomes of Himplant.
Is Himplant FDA-cleared?
Yes. Himplant®, manufactured by IMD, is an FDA 510(k)–cleared silicone penile implant, with indications that include cosmetic penile augmentation.
While Himplant may be compared with other subcutaneous silicone penile implants, similarities in materials, appearance, design, or surgical technique do not establish the same FDA regulatory status. FDA clearance applies to a specific device and its cleared indications. Competing products must have their own valid regulatory basis and cannot claim Himplant's FDA clearance as their own.
Can the 2026 study be used to evaluate other penile implant brands?
The review provides clinical evidence concerning the IMD implant products represented in its included studies. It does not establish the safety, effectiveness, or FDA status of unrelated implant brands.
Does Himplant treat erectile dysfunction?
Himplant is primarily a cosmetic penile augmentation implant and is not marketed as a treatment for erectile dysfunction. Its intended purpose differs from that of inflatable or malleable penile prostheses used to treat ED.
Explore the Science Behind Himplant
For patients considering penile enhancement, the availability of peer-reviewed clinical research offers valuable context for understanding treatment options.
The 2026 systematic review adds to the published evidence behind IMD's implant technology, while Himplant-specific studies continue to expand the clinical literature.
We encourage patients and healthcare professionals to explore the original publications, understand the reported outcomes, and consult qualified physicians when considering cosmetic penile augmentation.
Explore Himplant Clinical Research
Learn More About Himplant and Check Your Eligibility
Scientific References
2026 Systematic Review
Yang H, Xiao W, Wang H, Tang G. Subcutaneous penile silicone sleeve implants for penile augmentation: a systematic review and meta-analysis. International Journal of Impotence Research. Published October 5, 2026.
https://doi.org/10.1038/s41443-026-01368-8
2025 Himplant Clinical Study
Elist JJ, Amirazodi K, Tajkarimi K, et al. Silicone penile prosthesis without suprapubic lipectomy for buried penis: a pilot study on the efficacy of Himplant.
https://doi.org/10.1038/s41443-025-01125-3
2024 Himplant Clinical Study
Valenzuela RJ, Elist JJ, Moon D, et al. Himplant subcutaneous penile implant improves penile appearance and erectile dysfunction after radical prostatectomy: a case series.
https://doi.org/10.1038/s41443-024-00857-y
2024 Himplant Clinical Study
Levine LA, Desouky E, Elist JJ, et al. Use of Himplant for correction of residual deformity following prior treatment of Peyronie's disease: a case series.
https://doi.org/10.1038/s41443-024-00840-7
FDA Regulatory Reference
U.S. Food and Drug Administration. Pre-Formed Penile Silicone Block. 510(k) K220760. International Medical Devices, Inc.
https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm?ID=K220760
Disclosure: Himplant® is manufactured by International Medical Devices, Inc. This manufacturer-authored article summarizes published clinical literature and regulatory information. Individual outcomes vary, and surgical implantation carries potential risks.
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