A Prospective Observational Clinical Study on Exploring the Value of Surgical Excision Combined With 32P Application in the Treatment of Keloids and the Factors Affecting the Prognosis of Combined Therapy

NCT07413497 | Not Yet Recruiting

• 1 other identifier: SYSKY-2025-529-02
• Study Type: observational
• Target: 401
• Locations: 0 countries
• Sites: N/A

Brief Summary

Keloids are non-cancerous (benign) growths on the skin. They form after an injury, when the skin makes too much connective tissue that thickens and hardens. These keloids cause big problems for people. They grow uncontrollably on their own, itch, hurt, and look bad. This is especially true if they're on visible areas like the head or neck-they harm both a person's physical comfort and mental well-being. 32P application is a popular treatment for keloids. It's simple, easy to use, quick, and doesn't have many limits on where or when it can be used. Besides keloids, it also works for surface skin issues like hemangiomas. Here's how 32P works: When it breaks down (decays), it releases beta rays. These rays create a local effect that changes the shape and function of the affected tissue. Blood vessel cells in the area swell, get inflamed, and shrink, eventually blocking the blood vessels. Beta rays also stop two key things from growing too much: fibroblasts (cells that make connective tissue) and new blood vessels. This is how the treatment works-with very low chances of the keloid coming back and few side effects. For these reasons, we think combining surgery with 32P application is an effective way to treat keloids. Its success rate is similar to, or even better than, surgery combined with low-dose radiation. Also, two factors matter a lot for how well the treatment works long-term: when 32P application is started, and the dose used.

Conditions

Keloids; Keloids Scars

Keywords

32P; keloids; 32P application; nuclide application therapy; nuclide therapy

Outcome Measures

Primary Outcomes (1)

• Recurrence rate: Defined as the frequency or probability of a patient experiencing a recurrence of symptoms or the condition within 2 years after being clinically deemed cured (Vancouver Scar Scale [VSS] score ≤ 5 points, with a pruritus score of 0).

  Recurrence is determined by an increase in the VSS total score by ≥ 2 points compared to the clinical cure baseline. Enrolled patients will undergo sequential surgical excision followed by ³²P application therapy. The treatment endpoint is defined as either achieving a minimum therapeutic dose of 15Gy with a VSS score ≤ 5 (including a pruritus subscore of 0) or a cumulative total dose of 30Gy. After treatment completion, patients will be followed up every 6 months, and recurrence will be evaluated based on the VSS score at each follow-up visit.

  From the date of achieving the treatment endpoint until 24 months post-endpoint (assessed every 6 months during follow-up).

Secondary Outcomes (2)

• Time to progression (TTP)

  Time Frame: From treatment initiation until first documented progression or study completion (whichever comes first), assessed up to 36 months

• Patient satisfaction

  At the final follow-up visit, which occurs 36 months after achieving the treatment endpoint (or at study completion if earlier)

Study Arms (1)

Surgery combined with application therapy group

Keloid lesions with a thickness greater than 3 mm are recommended to receive application therapy after surgery and have been included in this observational study.

Eligibility Criteria

• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

This study will be conducted in patients diagnosed with keloids who meet the surgical indications. Investigators or designated personnel must ensure that only patients who meet all the following inclusion criteria and have no exclusion criteria are enrolled in the study.

You may qualify if:

• Histological biopsy confirms the patient has keloids. Pathological diagnostic criteria include: 1. Proliferating fibroblasts: A large number of proliferating fibroblasts are usually detected in keloid tissue. 2. Disordered arrangement of collagen fibers: Collagen fibers in normal scars are generally arranged in an orderly manner, while in keloids, they are disorganized and present as thick bundles. 3. Scar tissue extending beyond the original wound boundaries: Keloid tissue often spreads beyond the scope of the initial trauma.
• Patients with keloids ≥3 mm in thickness and within 1 week after surgical excision.
• Patients have at least one measurable lesion as defined by the Vancouver Scar Scale (VSS) criteria.
• Patients have no other skin disorders similar to keloids.
• Patients are capable of understanding and signing the informed consent form.
• Patients are willing and able to comply with scheduled visits, treatment plans, laboratory tests, follow-up appointments, and other study procedures.

You may not qualify if:

• Difficulty in accurately assessing the patient's lesions.
• Patients who do not meet the indications for local excision or have received superficial radiotherapy after surgery.
• Dementia, intellectual impairment, or any mental illness that hinders the understanding of the informed consent form.
• Patients deemed inappropriate to participate in this clinical study by the investigator.
• Patients from whom pathological specimens cannot be obtained, or those who die or are lost to follow-up.
• Patients with recurrent keloids following previous treatment.
• Pregnant female patients. -

Sponsors & Collaborators

• Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University: lead

Biospecimen

Retention: SAMPLES WITH DNA

scar tissue after keloid excision

MeSH Terms

Conditions

Keloid

Condition Hierarchy (Ancestors)

Collagen Diseases; Connective Tissue Diseases; Skin and Connective Tissue Diseases; Cicatrix; Fibrosis; Pathologic Processes; Pathological Conditions, Signs and Symptoms

Central Study Contacts

Dan Li, Principal Investigator（PI）

CONTACT

+8613918963005; lidan269@mail.sysu.edu.cn

Jiachen Liu

CONTACT

+8615820288637

Study Design

• Study Type: observational
• Observational Model: COHORT
• Time Perspective: PROSPECTIVE
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: November 25, 2025
• First Posted: February 17, 2026
• Study Start: June 1, 2026
• Primary Completion (Estimated): June 1, 2029
• Study Completion (Estimated): June 1, 2030
• Last Updated: February 17, 2026

Record last verified: 2025-08

Data Sharing

• IPD Sharing: Will share