Prognostic value of 99mTc-HYNIC Annexin-V imaging in squamous cell carcinoma of the head and neck
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The purpose of the study was to report on the prognostic value of 99mTc-hydrazinonicotinamide (HYNIC) Annexin-V single-photon emission computed tomography (SPECT) imaging in patients suffering from primary squamous cell carcinoma of the head and neck.
Twenty-nine patients diagnosed with a primary untreated head and neck squamous cell carcinoma were included in this study. In all patients, 99mTc-HYNIC Annexin-V scintigraphy SPECT was performed before treatment instigation. Tumour-to-background ratios (T/N) of the primary tumour, derived from reconstructed images, as well as clinical variables were obtained in all patients and related to patient outcome. Median follow-up was 22.6 months (range 4.1–55.8 months).
On univariate as well as multivariate analysis, only the 99mTc-HYNIC Annexin-V T/N ratio dichotomized using the group median as cutoff value (T/N ratio of 2) was predictive of recurrence-free survival (respectively, p = 0.0000 and 0.000). On univariate analysis, only lymph node status dichotomized according to N0 vs N1–N2–N3 disease and the 99mTc-HYNIC Annexin-V T/N ratio dichotomized using the group median as cutoff value (T/N ratio of 2) were predictive of overall survival (p = 0.0051 and 0.0000). When both factors were included in the multivariate model, both N status and the 99mTc-HYNIC Annexin-V T/N ratio showed an independent association with overall survival (p = 0.001 for lymph node status and 0.000 for dichotomized 99mTc-HYNIC Annexin-V T/N ratio).
99mTc-HYNIC Annexin-V T/N ratios derived from SPECT provides independent prognostic information on disease-free survival and overall survival.
KeywordsAnnexin V Apoptosis imaging Molecular imaging Oncology Prognosis
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