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Updated: Jul 16, 2026
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Published on: January 31, 2014
Collagen-binding ⁶⁸Ga-CBP8 PET/MR in Deep Pelvic Endometriosis: First-in-human Application
Antonino Andrea Blandino1,2, Peter Caravan1,3, Anuradha S Shenoy-Bhangle1
1Department of Radiology, Harvard Medical School, Massachusetts General Hospital, 55 Fruit Street, Boston, MA, 02114, USA.
Purpose:
To evaluate the feasibility of collagen-binding ⁶⁸Ga-CBP8 PET/MR for the noninvasive detection of deep infiltrating endometriosis.
Material And Methods:
A single-case exploratory application of ⁶⁸Ga-CBP8 PET/MR was conducted in a patient with endometriosis as a preliminary step toward a larger IRB-approved prospective study. Imaging was performed 60 min after intravenous administration of ⁶⁸Ga-CBP8. Fused PET/MR images were qualitatively assessed for focal tracer uptake exceeding background. Surgical pathology, assessed in a blinded fashion, served as the reference standard.
Results:
A 32-year-old woman with history of endometriosis completed the examination without adverse events. PET/MR demonstrated focal ⁶⁸Ga-CBP8 uptake corresponding on MR to a T2-hypointense plaque located between the left adnexa and the sigmoid colon, suspicious for deep pelvic endometriosis with bowel involvement. Surgical pathology confirmed endometriosis infiltrating the colonic muscularis mucosae and pericolonic tissue with dense fibrosis.
Conclusion:
⁶⁸Ga-CBP8 PET/MR is a feasible and promising technique to noninvasively detect deep infiltrating endometriosis, warranting validation in larger prospective studies.
Trial Registration:
ClinicalTrials.gov, NCT06377553. Date of first enrollment: February 5, 2025. Registered April 22, 2024.
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