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Review compares 68Ga-pentixafor and 18F-FDG PET/CT in a single CLL patient

Review compares 68Ga-pentixafor and 18F-FDG PET/CT in a single CLL patient
Photo by Jesse Karjalainen / Unsplash
Key Takeaway
Note that 68Ga-pentixafor showed superior lesion detection in a single CLL patient compared with 18F-FDG.

This publication is a case report and review of literature focusing on the diagnostic utility of 68Ga-pentixafor PET/CT imaging compared with 18F-FDG PET/CT imaging. The scope is restricted to a single 60-year-old woman diagnosed with chronic lymphocytic leukemia/small lymphocytic lymphoma. The primary outcome assessed was diagnostic performance in evaluating tumor burden and delineating disease extent. No secondary outcomes were reported in this source.

The main synthesized finding indicates that 68Ga-pentixafor PET/CT detected more lesions with significantly higher tracer uptake compared with 18F-FDG. The direction of the result suggests superior performance for 68Ga-pentixafor PET/CT in this specific instance. However, the effect size was not reported, and absolute numbers were not provided. No p-values or confidence intervals were available to quantify the statistical significance beyond the qualitative description of 'significantly higher' uptake.

Safety data, including adverse events, serious adverse events, discontinuations, and tolerability, were not reported. The study limitations are inherent to the single-patient design, which precludes generalization to broader populations. The authors do not explicitly note additional limitations beyond the case nature. Consequently, the practice relevance remains uncertain given the lack of comparative statistical rigor and safety data.

Study Details

Study typeSystematic review
EvidenceLevel 1
PublishedApr 2026
View Original Abstract ↓
Chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) is an indolent B-cell lymphoma for which current imaging modalities offer limited diagnostic value. This article reports a comparison of the imaging features of 18F-FDG and 68Ga-pentixafor in this disease and reviews the relevant literature. A 60-year-old woman presented with a 6-month history of fever and scattered systemic lymphadenopathy. The patient underwent both 18F-FDG and 68Ga-pentixafor PET/CT imaging within a 2-day period. 68Ga-pentixafor PET/CT identified significantly increased metabolic activity in enlarged lymph nodes, the spleen, and bone marrow. Immunohistochemical staining demonstrated a phenotypic profile positive for CD5, CD20, and CD23; showed focal positivity for cyclin D1; and was negative for CD10, BCL-6, and SOX11, findings consistent with the diagnosis of CLL/SLL. Compared with 18F-FDG, 68Ga-pentixafor PET/CT detected more lesions with significantly higher tracer uptake. This case suggests that, for patients with CLL/SLL, 68Ga-pentixafor PET/CT demonstrates significantly superior performance in evaluating the tumor burden and delineating the disease extent compared with 18F-FDG PET/CT.
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