Peroperative Assessment of Malignancies of the Head and Neck Using High-resolution 18F-FDG-PET/CT

University Hospital, Ghent9 enrolled

Overview

In this study, patients diagnosed with a pathology-proven malignancy of the head and neck will receive a routine clinical activity of 18F-FDG ((18)F-luorodeoxyglucose) before undergoing standard of care surgical resection of the malignancy. Following the resection, the 18F-FDG-infused malignancy will be investigated utilizing a novel high-resolution Positron Emission Tomography (PET) and Computed Tomography (CT) scan. Slicing of the malignancy will be followed by additional PET/CT-scanning and autoradiography of the sliced specimen. The results found during image analysis will be compared to the results of the gold standard of histopathology. As this is no approved way of assessing the tumour's margin, the conclusion of the scan will not be used as a method for changing the patients' treatment.

Study Type

INTERVENTIONAL

Allocation

Purpose

DIAGNOSTIC

Masking

NONE

Enrollment

Conditions

Head and Neck Neoplasms Thyroid Neoplasm Skin Neoplasm

high-resolution PET-CT specimen imaging.DIAGNOSTIC_TEST

Included patients are given a single weight-dependent activity of 18F-FDG at the department of Nuclear Medicine. After administration, patients are brought to the operating room where standard of care surgical removal of the malignancy is performed. The resected specimen(s) are brought to the imaging lab and scanned using a preclinical and/or a dedicated specimen PET/CT device. Following PET/CT imaging, the specimen is brought to the department of pathology, where it is sliced. Some of these slices are then rescanned using the preclinical PET/CT device. Moreover, frozen sections are made from one of these slices with macroscopically visible malignant tissue and placed on an autoradiograph overnight. Finally, the imaging results are then correlated to the results found during histopathological analysis of the specimens.

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Patients with one or multiple pathologically proven malignancies in the head and neck region (targeted lesions), independent of origin and stage. * Patient is planned for the surgical resection of the targeted lesion. * Age ≥ 18 years. * Karnofsky performance scale ≥30 * Patient has given informed consent according to the International Conference on Harmonization (ICH) Good Clinical Practice (GCP) guidelines in accordance with the declaration of Helsinki. Exclusion Criteria: * Patient is planned for a treatment regimen which does not include standard surgical resection of the targeted lesion. * Pregnant or actively lactating women. * Blood glucose level ≥ 200mg/dl or more on the day of surgery.

Outcomes

Primary Outcomes

Determine margin status in malignancies of the head and neck

To investigate the ability of high-resolution 18F-FDG-PET/CT-scan to determine the margin status in malignancies of the head and neck. This will be compared to the gold standard of histopathological examination.

Time frame: 1 week after administration

Secondary Outcomes

Characterize the ideal activity of 18F-FDG

The characterization of the ideal dose of 18F-FDG necessary for specimen imaging with a sufficient signal-to-noise ratio. This dose will be identified using post-processing image reconstruction on the specimen resulting from patients given a standard diagnostic activity of 18F-FDG.

Time frame: During data-analysis

Identify positive lymph nodes using 18F-FDG PET/CT

To investigate the ability of high-resolution 18F-FDG-PET/CT to identify positive lymph nodes excised by neck dissection. This will be quantified as sensitivity and specificity compared to the gold standard of histopathological examination.

Time frame: 1 week after administration

Correlate distribution of 18F-FDG with histopathology

To correlate the distribution of 18F-FDG in and around tumoral tissue with the histopathology of the specimen. This will be performed by correlating the results obtained from the PET/CT-scan of (sliced) tumoral specimens and autoradiography of a frozen section of the tumour.

Time frame: 1 day after administration