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Post-treatment appearances, pitfalls, and patterns of failure in head and neck cancer on FDG PET/CT imaging.

Purandare NC, Puranik AD, Shah S, Agrawal A, Rangarajan V - Indian J Nucl Med (2014)

Bottom Line: Majority of patients with head and neck cancer are treated with combined treatment regimes such as surgery, radiation therapy, and chemotherapy.The loss of structural symmetry and imaging landmarks as a result of therapy makes post-treatment imaging a daunting task on conventional modalities like computed tomography (CT) scan and magnetic resonance imaging (MRI) as well as on 18 Fluorine-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography (18F FDG PET/CT).Combined multimodality treatment approach causes various tissue changes that give rise to a spectrum of findings on FDG PET/CT imaging, which are depicted in this atlas along with a few commonly encountered imaging pitfalls.

View Article: PubMed Central - PubMed

Affiliation: Department of Nuclear Medicine and Molecular Imaging, Tata Memorial Hospital, Mumbai, Maharashtra, India.

ABSTRACT
Majority of patients with head and neck cancer are treated with combined treatment regimes such as surgery, radiation therapy, and chemotherapy. The loss of structural symmetry and imaging landmarks as a result of therapy makes post-treatment imaging a daunting task on conventional modalities like computed tomography (CT) scan and magnetic resonance imaging (MRI) as well as on 18 Fluorine-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography (18F FDG PET/CT). Combined multimodality treatment approach causes various tissue changes that give rise to a spectrum of findings on FDG PET/CT imaging, which are depicted in this atlas along with a few commonly encountered imaging pitfalls. The incremental value of FDG PET/CT in detecting locoregional recurrences in the neck as well as distant failures has also been demonstrated.

No MeSH data available.


Related in: MedlinePlus

Pitfalls of due asymmetric physiological uptake. Axial PET and fusion PET/CT show focal asymmetric uptake in the left masseter which is physiological in nature (arrows in a and b) and is produced due to altered mechanics of mastication secondary to jaw surgery
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Figure 8: Pitfalls of due asymmetric physiological uptake. Axial PET and fusion PET/CT show focal asymmetric uptake in the left masseter which is physiological in nature (arrows in a and b) and is produced due to altered mechanics of mastication secondary to jaw surgery

Mentions: Absence of physiological FDG uptake in the region of the surgically removed part and persistence of physiological uptake in the normal contralateral side produces an appearance of asymmetric tracer concentration that can mimic disease [Figure 6].[14] Occasionally, after partial resection of an organ such as the tongue, the remnant portion retains its physiological uptake, which appears focal in nature mimicking disease [Figure 7]. After extensive jaw surgeries and reconstructive procedures, the altered mechanics of mastication can result in physiologically increased focal uptake in the adjacent masticator muscles that can be mistaken for disease [Figure 8].


Post-treatment appearances, pitfalls, and patterns of failure in head and neck cancer on FDG PET/CT imaging.

Purandare NC, Puranik AD, Shah S, Agrawal A, Rangarajan V - Indian J Nucl Med (2014)

Pitfalls of due asymmetric physiological uptake. Axial PET and fusion PET/CT show focal asymmetric uptake in the left masseter which is physiological in nature (arrows in a and b) and is produced due to altered mechanics of mastication secondary to jaw surgery
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4157188&req=5

Figure 8: Pitfalls of due asymmetric physiological uptake. Axial PET and fusion PET/CT show focal asymmetric uptake in the left masseter which is physiological in nature (arrows in a and b) and is produced due to altered mechanics of mastication secondary to jaw surgery
Mentions: Absence of physiological FDG uptake in the region of the surgically removed part and persistence of physiological uptake in the normal contralateral side produces an appearance of asymmetric tracer concentration that can mimic disease [Figure 6].[14] Occasionally, after partial resection of an organ such as the tongue, the remnant portion retains its physiological uptake, which appears focal in nature mimicking disease [Figure 7]. After extensive jaw surgeries and reconstructive procedures, the altered mechanics of mastication can result in physiologically increased focal uptake in the adjacent masticator muscles that can be mistaken for disease [Figure 8].

Bottom Line: Majority of patients with head and neck cancer are treated with combined treatment regimes such as surgery, radiation therapy, and chemotherapy.The loss of structural symmetry and imaging landmarks as a result of therapy makes post-treatment imaging a daunting task on conventional modalities like computed tomography (CT) scan and magnetic resonance imaging (MRI) as well as on 18 Fluorine-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography (18F FDG PET/CT).Combined multimodality treatment approach causes various tissue changes that give rise to a spectrum of findings on FDG PET/CT imaging, which are depicted in this atlas along with a few commonly encountered imaging pitfalls.

View Article: PubMed Central - PubMed

Affiliation: Department of Nuclear Medicine and Molecular Imaging, Tata Memorial Hospital, Mumbai, Maharashtra, India.

ABSTRACT
Majority of patients with head and neck cancer are treated with combined treatment regimes such as surgery, radiation therapy, and chemotherapy. The loss of structural symmetry and imaging landmarks as a result of therapy makes post-treatment imaging a daunting task on conventional modalities like computed tomography (CT) scan and magnetic resonance imaging (MRI) as well as on 18 Fluorine-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography (18F FDG PET/CT). Combined multimodality treatment approach causes various tissue changes that give rise to a spectrum of findings on FDG PET/CT imaging, which are depicted in this atlas along with a few commonly encountered imaging pitfalls. The incremental value of FDG PET/CT in detecting locoregional recurrences in the neck as well as distant failures has also been demonstrated.

No MeSH data available.


Related in: MedlinePlus