Thyroid cancer - clinical
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Objective
Punctate echogenic foci (PEF)/microcalcifications are thought to represent psammoma bodies (PB) in histopathology. However, there are few and contradictory data on this. Different types of sonographic echogenic microfoci (EMF) are seen in papillary thyroid carcinoma (PTC), and their histopathological equivalents are not clearly known. There is also conflicting data on the interobserver agreement between the sonographers on EMF.
Methods
We prospectively collected US video records of PTC nodules with and without EMF in two large thyroid centers. All video recordings were independently interpreted by three blinded, experienced sonographers. EMF were classified as true microcalcifications (punctate echogenic foci (PEF) ≤1 mm long), linear microechogenities (>1 mm long, posterior acoustic enhancement of the back wall of a microcystic area), comet-tail artifacts/reverberations or linear microechogenities with comet-tail artifacts/reverberations, non-shadowing coarse echogenic foci (>1 mm nonlinear areas) and unclassifiable. Histopathological evaluation was performed by two blinded, qualified pathologists.
Results
A total of 114 malignant nodules were included. The average Cohen’s kappa (κ) of three sonographers for the EMF presence was 0.775, indicating substantial agreement. A substantial agreement for PEF with 0.658 κ, only fair agreement for other types of EMF with 0.052 to 0.296 κ were detected. EMF were significantly associated with PB and papillae. PEF had an evident relationship with PB in multivariate analysis. There was a strong positive correlation between the amount of PEF and PB (r = 0.634, P < 0.001).
Conclusions
PEF in PTC mainly correspond to PB on histopathology. Although observation of EMF varies among sonographers, this inconsistency can be reduced by classifying EMF into subgroups and keeping the term ‘PEF’ only for true microcalcifications.
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Background
Second 131I treatment is commonly performed in clinical practice in patients with differentiated thyroid cancer and biochemical incomplete or indeterminate response (BiR/InR) after initial treatment.
Objective
The objective of the is study is to evaluate the clinical impact of the second 131I treatment in BiR/InR patients and analyze the predictive factors for structural incomplete response (SiR).
Patients and methods
One hundred fifty-three BiR/InR patients after initial treatment who received a second 131I treatment were included in the study. The clinical response in a short- and medium- long-term follow-up was evaluated.
Results
After the second 131I treatment (median 8 months), 11.8% patients showed excellent response (ER), 17% SiR, while BiR/InR persisted in 71.2%. Less than half (38.5%) of SiR patients had radioiodine-avid metastases. Patients who, following the second 131I treatment, experienced SiR had larger tumor size and more frequently aggressive histology and vascular invasion than those experienced BiR/InR and ER. Also, the median values of thyroglobulin on levothyroxine therapy (LT4-Tg), Tg peak after recombinant human TSH stimulation (rhTSH-Tg) and thyroglobulin antibodies (TgAb) were significantly higher in patients who developed SiR. At last evaluation (median: 9.9 years), BiR/InR persisted in 57.5%, while 26.2% and 16.3% of the patients showed ER and SiR, respectively. About half of BiR/InR patients (71/153 (46.4%)) received further treatments after the second 131I treatment.
Conclusions
Radioiodine-avid metastatic disease detected by the second 131I is an infrequent finding in patients with BiR/InR after initial treatment. However, specific pathologic and biochemical features allow to better identify those cases with higher probability of developing SiR, thus improving the clinical effectiveness of performing a second 131I treatment.
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Objective
The aim of this study is to describe the characteristics, survival and prognostic factors of a cohort of patients with bone metastases (BMs) from differentiated thyroid carcinoma (DTC).
Methods
This was a multicenter retrospective observational study including patients diagnosed with BMs from DTC between 1980 and 2021. A Cox regression was performed to study prognostic factors for 5- and 10-year survival. Kaplan–Meier and log-rank tests were performed for the survival analysis and comparison between groups.
Results
Sixty-three patients were evaluated. Median follow-up from BM diagnosis was 35 (15–68) months. About 30 (48.4%) patients presented with synchronous BMs. Regarding histology, 38 (60.3%) had the papillary variant. BMs were multiple in 32 (50.8%) patients. The most frequent location was the spine (60.3%). Other metastases were present in 77.8%, mainly pulmonary (69.8%). Concerning treatment, 54 (85.9%) patients received I131, with BM uptake in 31 (49.2%) and 25 (39.7%) received treatment with multikinase inhibitors. Regarding complications, 34 (54%) patients had skeletal-related events, 34 (54%) died and 5- and 10-year overall survival was 42.4% and 20.4%, respectively. Significant prognostic factors in the multivariate analysis were the presence of lymph node involvement (hazard ratio (HR): 2.916; 95% confidence interval (CI): 1.013–8.391; P = 0.047) and treatment with I131 (HR 0.214 (95% CI 0.069–0.665); P = 0.008) at 5 years, the presence of other metastases (HR 6.844. 95% CI 1.017–46.05; P = 0.048) and treatment with I131 (HR 0.23 (95% CI 0.058–0.913); P = 0.037) at 10 years.
Conclusions
Our study reflects the management of patients with bone metastases from differentiated thyroid carcinoma in real clinical practice in several centers in southern Spain. Overall survival at 5 and 10 years was lower in patients who were not treated with I131, had nodal involvement and/or had other metastases.
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Department of Radiology, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
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Mayfair Radiology, Calgary, Alberta, Canada
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Departments of Medicine, Oncology, Pathology and Laboratory Medicine, Biochemistry and Molecular Biology, and Arnie Charbonneau Cancer Institute, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
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Objective
The aim of this study was to prospectively evaluate the quality of postoperative neck ultrasound (POU) for thyroid cancer patients after implementing European Thyroid Association (ETA) guideline-based POU assessment.
Methods
Our analysis involved 672 differentiated thyroid cancer patients. POU report quality was compared between the implementation radiology group (IRG), which implemented ETA guideline-based assessment in 2018, and all non-implementation radiology groups (NIRG). Differences in POU quality were evaluated before and after the implementation of guideline-based assessment. Additionally, we evaluated the ability of serum thyroglobulin (Tg) level <0.2 ng/mL or between 0.21 and 0.99 ng/mL and normal POU lesion status at 1-year follow-up to predict the absence of persistent disease or relapse at 3-year follow-up.
Results
IRG had significantly higher mean utility scores for POU reports of abnormal thyroid bed nodules compared to NIRG (P < 0.001). IRG's POU reports for suspicious nodules and lymph nodes were considered sufficient in 94% and 85% of cases, respectively, compared to 45% and 68% for NIRG. For patients with normal US lesion status and Tg <0.2 ng/mL or Tg 0.21–0.99 ng/mL at 1-year follow-up, the negative predictive values were 96% for both.
Conclusions
Implementation of 2013 ETA POU-reporting guidelines allowed for the provision of high-quality POU reports, which may lead to increased accuracy in assessing the response to treatment and in estimating the risk of recurrence of thyroid cancer and likely reduce unnecessary repeat POU or FNA.
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Department of Internal Medicine and Therapeutics, University of Pavia, Italy
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Background
Most thyroid cancers of follicular origin have a favorable outcome. Only a small percentage of patients will develop metastatic disease, some of which will become radioiodine refractory (RAI-R). Important challenges to ensure the best therapeutic outcomes include proper, timely, and appropriate diagnosis; decisions on local, systemic treatments; management of side effects of therapies; and a good relationship between the specialist, patients, and caregivers.
Methods
With the aim of providing suggestions that can be useful in everyday practice, a multidisciplinary group of experts organized the following document, based on their shared clinical experience with patients with RAI-R differentiated thyroid cancer (DTC) undergoing treatment with lenvatinib. The main areas covered are patient selection, initiation of therapy, follow-up, and management of adverse events.
Conclusions
It is essential to provide guidance for the management of RAI-R DTC patients with systemic therapies, and especially lenvatinib, since compliance and adherence to treatment are fundamental to achieve the best outcomes. While the therapeutic landscape in RAI-R DTC is evolving, with new targeted therapies, immunotherapy, etc., lenvatinib is expected to remain a first-line treatment and mainstay of therapy for several years in the vast majority of patients and settings. The guidance herein covers baseline work-up and initiation of systemic therapy, relevance of symptoms, multidisciplinary assessment, and patient education. Practical information based on expert experience is also given for the starting dose of lenvatinib, follow-up and monitoring, as well as the management of adverse events and discontinuation and reinitiating of therapy. The importance of patient engagement is also stressed.
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Purpose
To determine whether thyroid-stimulating hormone level ≥ 30 mU/L is necessary for radioiodine (131I) remnant ablation (RRA) in patients with differentiated thyroid cancer (DTC), as well as its influencing factors and predictors.
Methods
A total of 487 DTC patients were retrospectively enrolled in this study. They were divided into two groups (TSH < 30 and ≥ 30 mU/L) and further divided into eight subgroups (0–<30, 30–<40, 40–<50, 50–<60, 60–<70, 70–<80, 80–<90, and 90–<100 mU/L). The simultaneous serum lipid level, successful rate of RRA and its influencing factors in different groups were analyzed. The receiver operating characteristic curves derived from pre-ablative thyroglobulin (pre-Tg) and pre-Tg/TSH ratio were compared for RRA success prediction performance.
Results
There was no statistical difference in success rates of RRA between the two groups (P = 0.247) and eight subgroups (P = 0.685). Levels of total cholesterol (P < 0.001), triglyceride (P = 0.006), high-density lipoprotein cholesterol (P = 0.024), low-density lipoprotein cholesterol (P = 0.001), apolipoprotein B (P < 0.001), and apolipoprotein E (P = 0.002) were significantly higher while apoA/apoB ratio (P = 0.024) was significantly lower at TSH ≥ 30 mU/L group. Pre-Tg level, gender, and N stage were influencing factors for RRA. The area under the curve of pre-Tg level and pre-Tg/TSH ratio was 0.7611 (P < 0.0001) and 0.7340 (P < 0.0001) for all enrolled patients and 0.7310 (P = 0.0145) and 0.6524 (P = 0.1068) for TSH < 30 mU/L, respectively.
Conclusion
TSH ≥ 30 mU/L may not be necessary for the success of RRA. Patients with higher serum TSH levels prior to RRA will suffer from severer hyperlipidemia. Pre-Tg level could be used as a predictor for the success of RRA, especially when TSH < 30 mU/L.
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Objective
A decrease in the use of radioactive iodine (RAI) treatment for thyroid cancer has been described in the last decade in the US following subsequent updates of the American Thyroid Association guidelines. By contrast, population-based data from European countries are lacking. The study aims to assess the frequency and long-term trends in the use of RAI in Italy.
Methods
From the Italian national hospital discharge database, the proportion of RAI treatment after total thyroidectomy with thyroid cancer diagnosis has been assessed by sex and age class during 2001–2018.
Results
Throughout the whole study period, RAI was performed after 58% of 149,419 total thyroidectomies. The use of RAI was higher for men and younger patients; it peaked in 2007 (64% in women and 68% in men) and declined thereafter (2018: 46% in women and 53% in men), with a similar pattern observed across all ages and areas.
Conclusion
National data show that in Italy trends in RAI treatment paraleled those observed in the US. Further monitoring of the use of RAI is warranted in Italy, as elsewhere, to assess the impact of international guidelines on real-life clinical management of thyroid cancer.
Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
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Department of Medicine and Surgery, University of Milano-Bicocca, Milan, Italy
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Department of Medicine and Surgery, University of Milano-Bicocca, Milan, Italy
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Department of Biotechnology and Translational Medicine, University of Milan, Milan, Italy
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Department of Pathophysiology and Transplantation, University of Milan, Milan, Italy
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Background
Hypertension (HTN) is the most frequent adverse event during treatment with lenvatinib (LEN), but data on its best management are limited.
Aim
The objective of this study was to assess incidence, features and best management of LEN-related HTN in a consecutive single tertiary-care centre cohort.
Methods
Twenty-nine patients were followed up for a mean time of 29.8 months (6–77 months).
Results
After a mean follow-up of 6.8 months, HTN was recorded in 76% of cases, as a de novo occurrence in half of them. HTN significantly correlated with LEN dose and was of grade 1, grade 2 and grade 3 in 5%, 50% and 45% of patients, respectively. The majority (77%) of patients with HTN developed proteinuria. There was no correlation between HTN and proteinuria or clinical features or best morphological response or any other adverse event (AE), with the exception of diarrhoea. Patients with or without pre-existing HTN or any other cardiovascular disease had a similar incidence of HTN during LEN, thus excluding the impact of this potential predisposing factor. After evaluation by a dedicated cardiologist, medical treatment was introduced in 21/22 patients (polytherapy in 20 of them). The most frequently used drugs were calcium channel blockers (CCBs) due to their effect on vasodilation. In case of poor control, CCBs were associated with one or more anti-hypertensive drug.
Conclusion
HTN is a frequent and early AE in patients on LEN treatment. We suggest a diagnostic and therapeutic algorithm to be applied in clinical practice to allow efficient HTN control and improve patient compliance, reducing LEN discontinuation.
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Objective
Global thyroid cancer (TC) incidence is growing worldwide, but great heterogenicity exists among published studies, and thus, population-specific epidemiological studies are needed to adequate health resources and evaluate the impact of overdiagnosis.
Methods
We conducted a Public Health System database retrospective review of TC incident cases from 2000 to 2020 in the Balearic Islands region and evaluated age-standardized incidence rate (ASIR), age at diagnosis, gender distribution, tumor size and histological subtype, mortality rate (MR), and cause of death. Estimated annual percent changes (EAPCs) were also evaluated and data from the 2000–2009 period were compared to the 2010–2020 period when neck ultrasound (US) was routinely performed by clinicians at Endocrinology Departments.
Results
A total of 1387 incident cases of TC were detected. Overall, ASIR (×105) was 5.01 with a 7.82% increment in EAPC. A significant increase in the 2010–2020 period was seen for ASIR (6.99 vs 2.82, P < 0.001) and age at diagnosis (52.11 vs 47.32, P < 0.001) compared to the 2000–2009 period. A reduction in tumor size (2.00 vs 2.78 cm, P < 0.001) and a 6.31% increase in micropapillary TC (P < 0.05) were also seen. Disease-specific MR remained stable at 0.21 (×105). The mean age at diagnosis for all mortality groups was older than survivors (P < 0.001).
Conclusion
The incidence of TC has grown in the 2000–2020 period in the Balearic Islands, but MR has not changed. Beyond other factors, a significant contribution of overdiagnosis to this increased incidence is likely due to changes in the routine management of thyroid nodular disease and increased availability of neck US.
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Unidade de Investigação em Patobiologia Molecular (UIPM), Instituto Português de Oncologia de Lisboa Francisco Gentil, Lisbon, Portugal
Nova Medical School: Faculdade de Ciências Médicas da Universidade Nova de Lisboa, Lisbon, Portugal
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Background
Treatment of advanced follicular thyroid carcinoma (FTC) is based primarily on indirect evidence obtained with multikinase inhibitors (MKI) in clinical trials in which papillary carcinomas represent the vast majority of cases. However, it should be noted that MKI have a non-negligible toxicity that may decrease the patient’s quality of life. Conventional chemotherapy with GEMOX (gemcitabine plus oxaliplatin) is an off-label therapy, which seems to have some effectiveness in advanced differentiated thyroid carcinomas, with a good safety profile, although further studies are needed.
Case report
We report a case of a metastatic FTC, resistant to several lines of therapy. However, with a durable response to GEMOX, the overall survival of our patient appears to have been extended significantly due to this chemotherapy.
Conclusion
GEMOX may have a role in patients with thyroid cancer unresponsive to MKI.
