Assessment of salivary gland tumors using MRI and CT: impact of experience on diagnostic accuracy

Vogl, Thomas J.; Albrecht, Moritz H.; Nour-Eldin, Nour-Eldin A.; Ackermann, Hanns; Maataoui, Adel; Stöver, Timo; Bickford, Matthew W.; Stark-Paulsen, Tatjana

doi:10.1007/s11547-017-0813-z

Cited by 24 publications

(21 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…and malignant parotid lesions (4,(13)(14)(15)(16). However, recent studies have demonstrated a comparable high sensitivity and specificity between these imaging modalities (7,17,18). Our study revealed that benign tumours are more common than malignancies, reporting a prevalence of 89% for benign form.…”

Section: A B Csupporting

confidence: 53%

Delayed enhancement in differential diagnosis of salivary gland neoplasm

et al. 2019

View full text Add to dashboard Cite

Background: Multi-phasic Computed Tomography (CT) evaluation allows to study the enhancement features of parotid gland masses. The aim of our study was to evaluate the role of delayed enhancement in the characterization of different histologic types of parotid tumours. Methods: Forty-eight patients (22 male and 26 female) with at least one parotid gland tumor, were included in our study. Multi-phase CT images were obtained before and 30, 120 s and 8 minutes after intravenous contrast injection. The images were evaluated by two radiologists for lesion enhancement degree. A quantitative assessment was performed using a region of interest on each lesion and density changes between different phases were compared. The tumoral enhancement ratio was calculated between the 8 minutes delayed and the early (30 s) phase. The pathological diagnosis was confirmed in all patients after surgery. Results: All patients had unilateral lesion for a total of 48 lesions. Twenty-eight were pleomorphic adenomas, 15 Warthin's tumours and 5 carcinomas. All Warthin tumours showed a rapid contrast enhancement at the early phase (30 sec) followed by a progressive wash-out during the delayed scans. Most of pleomorphic adenomas (89.2%) showed the highest density at the 8-minutes delayed phase. Malignant tumours showed slower contrast enhancement and 3 out of 5 (60%) showed a marked decrease at the 8 minutes delayed phase while the remaining 2 (40%), did not show any density reduction. The tumoral enhancement ratio was significantly different between Warthin tumours and pleomorphic adenomas and between Warthin's and malignant tumours. Conclusions: Multi-phasic CT examination with 8 minutes delayed acquisition has shown to be useful in parotid gland lesion differentiation.

show abstract

Section: A B Csupporting

confidence: 53%

Delayed enhancement in differential diagnosis of salivary gland neoplasm

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Kaup et al evaluated the impact of radiologists' experience in diagnostic accuracy of osteoporotic vertebral compression fractures in CT and MRI imaging [33]. In another field of imaging, radiologists' experience was also addressed in the assessment of salivary gland tumours with the use of CT and MRI [34]. In both studies, higher experience resulted in greater reliability.…”

Section: Discussionmentioning

confidence: 99%

Reliability of humeral head measurements performed using two- and three-dimensional computed tomography in patients with shoulder instability

Stefaniak

Kubicka

Wawrzyniak

et al. 2020

International Orthopaedics (SICOT)

View full text Add to dashboard Cite

Purpose The aim of the study was to compare two measurement methods of humeral head defects in patients with shoulder instability. Intra- and inter-observer reliability of humeral head parameters were performed with the use of 2D and 3D computed tomography. Methods The study group was composed of one hundred humeral heads measured with the use of preoperative 2D and 3D computed tomography by three independent observers (two experienced and one inexperienced). All observers repeated measurements after 1 week. The intra-class correlation coefficient (ICC) and the minimal detectable change with 95% confidence (MDC95%) were used for statistical analysis of diagnostic agreement. Results For 3D inter-observer reliability, ICC values were “excellent” for all parameters and MDC95% values were “excellent” or “reasonable.” All intra-observer ICC and MDC95% values for 3D were “excellent” for experienced and inexperienced observers. For 2D-CT, ICC values were usually “good” or “moderate” with MDC95% values higher than 10 or 30%. Conclusions Three-dimensional CT measurements are more reliable than 2D for humeral head and Hill-Sachs lesion assessment. This study showed that 2D measurements, even performed by experienced observers (orthopaedic surgeons), are burdened with errors. The 3D reconstruction decreased the risk of error by eliminating inaccuracy in setting the plane of the measurements.

show abstract

“…Recent literature reports that DWI with ADC values can be regarded as a useful method in the diagnosis and quantitative measurement of neoplasms (41)(42)(43); in particular, several evidences reported significantly lower ADC values in malignancies than in benign lesions and normal tissues (44,45). The ADC value has also been used to predict nodal metastases in many different cancers and to differentiate malignant from benign lymph nodes in various body regions and organs, such as head and neck, uterine, and cervical cancers (46)(47)(48)(49)(50)(51). The possible functional mechanism is that high cellularity in lymph node metastases produced by the tumor cells, may decrease extracellular and intracellular spaces, and restrict water molecules mobility, finally leading to a reduction of ADC value (52).…”

Section: Dwi Of Lymph Node Metastases: Current Evidencesmentioning

confidence: 99%

Apparent diffusion coefficient magnetic resonance imaging (ADC-MRI) in the axillary breast cancer lymph node metastasis detection: a narrative review

et al. 2020

View full text Add to dashboard Cite

The presence of axillary lymph nodes metastases in breast cancer is the most significant prognostic factor, with a great impact on morbidity, disease-related survival and management of oncological therapies; for this reason, adequate imaging evaluation is strictly necessary. Physical examination is not enough sensitive to assess breast cancer nodal status; axillary ultrasonography (US) is commonly used to detect suspected or occult nodal metastasis, providing exclusively morphological evaluation, with low sensitivity and positive predictive value. Currently, sentinel lymph node biopsy (SLNB) and/or axillary dissection are the milestone for the diagnostic assessment of axillary lymph node metastases, although its related morbidity. The impact of magnetic resonance imaging (MRI) in the detection of nodal metastases has been widely investigated, as it continues to represent the most promising imaging modality in the breast cancer management. In particular, diffusion-weighted imaging (DWI) and apparent diffusion coefficient (ADC) values represent additional reliable non-contrast sequences, able to improve the diagnostic accuracy of breast cancer MRI evaluation. Several studies largely demonstrated the usefulness of implementing DWI/ADC MRI in the characterization of breast lesions. Herein, in the light of our clinical experience, we perform a review of the literature regarding the diagnostic performance and accuracy of ADC value as potential pre-operative tool to define metastatic involvement of nodal structures in breast cancer patients.

show abstract

Assessment of salivary gland tumors using MRI and CT: impact of experience on diagnostic accuracy

Abstract: Diagnostic accuracy in the assessment of salivary gland tumors strongly depends on the observer's expertise and increases with higher experience.

Cited by 24 publications

References 36 publications

Delayed enhancement in differential diagnosis of salivary gland neoplasm

Delayed enhancement in differential diagnosis of salivary gland neoplasm

Reliability of humeral head measurements performed using two- and three-dimensional computed tomography in patients with shoulder instability

Apparent diffusion coefficient magnetic resonance imaging (ADC-MRI) in the axillary breast cancer lymph node metastasis detection: a narrative review

Contact Info

Product

Resources

About