SynthesisInternational journal of clinical and experimental pathology2015
Cytologic, clinicopathologic, and molecular features of papillary thyroid carcinoma with prominent hobnail features: 10 case reports and systematic literature review.
Synthesis in International journal of clinical and experimental pathology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers, 2 of them syntheses that pooled it.
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Who cites it
24 citing papers in PubMed, 2 syntheses or guidelines pooled it.
- Prevalence of Differentiated High-Grade Thyroid Carcinoma Among Well-Differentiated Tumors: A Systematic Review and Meta-Analysis.Thyroid : official journal of the American Thyroid Association · 2024Pooled it
- Hobnail variant of papillary thyroid carcinoma: a systematic review and meta-analysis.Endocrine · 2021Pooled it
- Fine Needle Aspiration Cytology of Papillary Thyroid Carcinoma: Association of Cytological Features with Tumor Invasiveness in 43 Cases.Iranian journal of pathology · 2026Article
- High Ki-67 labeling index correlates with aggressive clinicopathological features in papillary thyroid carcinoma: a retrospective study.Thyroid research · 2025Article
- Cytologic and Clinicopathologic Features of Papillary Thyroid Carcinoma with Prominent Hobnail Features on FNAC.Indian journal of otolaryngology and head and neck surgery : official publication of the Association of Otolaryngologists of India · 2024Article
- Review
- Clinical-Pathological Features and Treatment Outcome of Patients With Hobnail Variant Papillary Thyroid Carcinoma.Frontiers in endocrinology · 2022Article
- Clinicopathological Characteristics and Recurrence-Free Survival of Rare Variants of Papillary Thyroid Carcinomas in Korea: A Retrospective Study.Endocrinology and metabolism (Seoul, Korea) · 2021Article
- Molecular Pathology of Non-familial Follicular Epithelial-Derived Thyroid Cancer in Adults: From RAS/BRAF-like Tumor Designations to Molecular Risk Stratification.Endocrine pathology · 2021Review
- Article
- Updates in the Pathologic Classification of Thyroid Neoplasms: A Review of the World Health Organization Classification.Endocrinology and metabolism (Seoul, Korea) · 2020Review
- Pitfalls in Challenging Thyroid Tumors: Emphasis on Differential Diagnosis and Ancillary Biomarkers.Endocrine pathology · 2020Review
- First ever case report of co-occurrence of hobnail variant of papillary thyroid carcinoma and intrathyroid parathyroid adenoma in the same thyroid lobe.International journal of surgery case reports · 2020Article
- Prediction of the Prognosis Based on Chromosomal Instability-Related DNA Methylation Patterns of ELOVL2 and UBAC2 in PTCs.Molecular therapy. Nucleic acids · 2019Article
- Mouse Model of Thyroid Cancer Progression and Dedifferentiation Driven by STRN-ALK Expression and Loss of p53: Evidence for the Existence of Two Types of Poorly Differentiated Carcinoma.Thyroid : official journal of the American Thyroid Association · 2019Article
- Cytologic features of aggressive variants of follicular-derived thyroid carcinoma.Cancer cytopathology · 2019Review
- Telomere Maintenance Mechanisms in Cancer.Genes · 2018Review
- Hobnail Variant of Papillary Thyroid Carcinoma: a Literature Review.Endocrine pathology · 2017Review
- Ultrasonographic imaging of papillary thyroid carcinoma variants.Ultrasonography (Seoul, Korea) · 2017Review
- Article
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The hobnail variant of papillary thyroid carcinoma (PTC) is a rare, aggressive variant in which > 30% of the tumor cells have hobnail features. The clinical behavior and pathologic characteristics of these tumors are still unclear due to the rarity of the entity. The present study aimed to investigate cytologic, clinical, pathological, and molecular features of the hobnail variant from our data and from the literature. We retrospectively retrieved 10 cases of hobnail variant from 2,904 consecutive PTC patients. Cytologic and histopathologic slides from those 10 patients were reviewed. We performed molecular analysis for BRAF, ALK, and TERT promoter mutations on paraffin blocks from surgical specimens, and further analyzed the clinicopathologic characteristics of all case reports published in the literature until now. Cytologically, all tumors were characterized by single cells with eccentric nuclei and tapering cytoplasm (comet-like cells), and syncytial or micropapillary clusters with apically placed nuclei resulting in a hobnail appearance in both conventional smears and liquid-based cytology. The BRAF V600E mutation was found in 8 cases (80%) whereas no cases had ALK fusion or TERT promoter mutations. In the literature review of 55 patients including our cases, most patients presented with advanced stage cancer, and disease-specific survival rates were 83%, 71%, and 54% at 5, 10, and 20 years after the initial surgery, respectively. Characteristic cytologic features can allow a preoperative diagnosis of the hobnail variant of PTC based on cytology specimens. Further studies should be performed to identify the molecular genetics of the variant.
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