Papillae, psammoma bodies, and/or many nuclear pseudoinclusions are helpful criteria but should not be required for a definitive cytologic diagnosis of papillary thyroid carcinoma: An institutional experience of 207 cases with surgical follow up.

BACKGROUND: Noninvasive follicular thyroid neoplasm with papillary-like features (NIFTP) was introduced in 2016 replacing noninvasive follicular variant of papillary thyroid carcinoma, with recommendations to label them "noncancer." To avoid reducing risk of malignancy (ROM) and overdiagnosing NIFTP as malignant, some authors required restricted cytologic criteria (RC) for a definitive diagnosis of papillary thyroid carcinoma (PTC), including papillae, psammoma bodies. or ≥3 nuclear pseudoinclusions. Since then, NIFTP criteria have been revised, biologic behavior better understood, and incidence reported to be much lower than initially anticipated. This study examines the impact of RC on PTC cytologic diagnoses, ROM, and detection of clinically significant carcinomas (CSC). MATERIALS AND METHODS: A total of 207 thyroid FNAs originally diagnosed as PTC and suspicious for PTC (SPTC) with surgical follow-up were evaluated. RC were retrospectively applied to cases as a requirement for diagnosing PTC, and cases that did not meet RC were reclassified as SPTC. ROMs and diagnostic accuracies of pre- and post-RC diagnoses were correlated with followup CSC. RESULTS: RC were met in 118/142 (83%) and 20/65 (31%) of cases originally diagnosed as PTC and SPTC, respectively. Post-RC, 29% (19/65) of CSC originally diagnosed as SPTC were upgraded to PTC, and 17% (24/142) of CSC originally diagnosed as PTC were downgraded to SPTC. No NIFTPs were diagnosed as malignant. CONCLUSIONS: RC should not be required for a definitive diagnosis of PTC when other nuclear features of PTC are diffuse and overt. Applying RC, however, helps the pathologist arrive at a more definitive diagnosis of PTC in suspicious cases.

Machine learning driven index of tumor multinucleation correlates with survival and suppressed anti-tumor immunity in head and neck squamous cell carcinoma patients.

OBJECTIVES: Matching treatment intensity to tumor biology is critical to precision oncology for head and neck squamous cell carcinoma (HNSCC) patients. We sought to identify biological features of tumor cell multinucleation, previously shown by us to correlate with survival in oropharyngeal (OP) SCC using a machine learning approach. MATERIALS AND METHODS: Hematoxylin and eosin images from an institutional OPSCC cohort formed the training set (DTr). TCGA HNSCC patients (oral cavity, oropharynx and larynx/hypopharynx) formed the validation set (DV). Deep learning models were trained in DTr to calculate a multinucleation index (MuNI) score. Gene set enrichment analysis (GSEA) was then used to explore correlations between MuNI and tumor biology. RESULTS: MuNI correlated with overall survival. A multivariable nomogram that included MuNI, age, race, sex, T/N stage, and smoking status yielded a C-index of 0.65, and MuNI was prognostic of overall survival (2.25, 1.07-4.71, 0.03), independent of the other variables. High MuNI scores correlated with depletion of effector immunocyte subsets across all HNSCC sites independent of HPV and TP53 mutational status although the correlations were strongest in wild-type TP53 tumors potentially due to aberrant mitotic events and activation of DNA-repair mechanisms. CONCLUSION: MuNI is associated with survival in HNSCC across subsites. This may be driven by an association between high levels of multinucleation and a suppressive (potentially exhausted) tumor immune microenvironment. Mechanistic studies examining the link between multinucleation and tumor immunity will be required to characterize biological drivers of multinucleation and their impact on treatment response and outcomes.

Top 10 Nested Pattern Head and Neck Lesions to Notice.

BACKGROUND: Nested is defined as "cellular clusters arranged in small groupings with intervening vascular or stromal networks, lacking lumens or glandular formation." Using this definition, multiple neoplastic and non-neoplastic lesions of the head and neck come into the differential. We have broadly organized the differential diagnosis of "nested" tumors into entities with neuroendocrine differentiation, squamous differentiation, thyroid follicular cell differentiation, and other lesions. METHODS: Review. RESULTS: Many different entities have a nested appearance and the morphologic, immunohistochemical, clinical, and radiographic features contribute to the differential diagnosis. The different tumors covered in this review include neuroendocrine neoplasms, paraganglioma, middle ear neuroendocrine tumor (formerly known as middle ear adenoma), medullary thyroid carcinoma, poorly differentiated thyroid carcinoma, olfactory neuroblastoma, ectopic pituitary neuroendocrine tumor, hyalinizing trabecular tumor, solid subtype of papillary thyroid carcinoma, solid cell nests/C-cell hyperplasia, necrotizing sialometaplasia, and meningioma. CONCLUSION: In this review, we discuss the morphologic and immunohistochemical features of the covered entities as a guide to differential diagnosis when nested-patterned head and neck lesions are encountered.

Association of Treatment Strategies and Tumor Characteristics With Overall Survival Among Patients With Anaplastic Thyroid Cancer: A Single-Institution 21-Year Experience.

Importance: Survival outcomes for anaplastic thyroid cancer (ATC), the most aggressive subtype of thyroid cancers, have remained poor. However, targeted therapies and immunotherapies present new opportunities for treatment of this disease. Evaluations of survival outcomes over time with new multimodal therapies are needed for optimizing treatment plans. Objective: To evaluate the association of treatment strategies and tumor characteristics with overall survival (OS) among patients with ATC. Design, Setting, and Participants: This retrospective case series study evaluated the survival outcomes stratified by treatment strategies and tumor characteristics among patients with ATC treated at a tertiary level academic institution from January 1, 2000, to December 31, 2021. Demographic, tumor, treatment, and outcome characteristics were analyzed. Kaplan-Meier method and log rank test modeled OS by treatment type and tumor characteristics. Data were analyzed in May 2022. Main Outcomes and Measures: Overall survival (OS). Results: The study cohort comprised 97 patients with biopsy-proven ATC (median [range] age at diagnosis, 70 [38-93] years; 60 (62%) female and 85 [88%] White individuals; 59 [61%] never smokers). At ATC diagnosis, 18 (19%) patients had stage IVA, 19 (20%) had stage IVB, and 53 (55%) had stage IVC disease. BRAF status was assessed in 38 patients; 18 (47%) had BRAF-V600E variations and 20 (53%), BRAF wild type. Treatment during clinical course included surgery for 44 (45%) patients; chemotherapy, 41 (43%); definitive or adjuvant radiation therapy, 34 (RT; 35%); and targeted therapy, 28 (29%). Median OS for the total cohort was 6.5 (95% CI, 4.3-10.0) months. Inferior OS was found in patients who did not receive surgery (hazard ratio [HR], 2.12; 95% CI, 1.35-3.34; reference, received surgery), chemotherapy (HR, 3.28; 95% CI, 1.99-5.39; reference, received chemotherapy), and definitive or adjuvant RT (HR, 2.47; 95% CI, 1.52-4.02; reference, received definitive/adjuvant RT). On multivariable analysis, age at diagnosis (HR, 1.03; 95% CI, 1.01-1.06), tumor stage IVC (HR, 2.65; 95% CI, 1.35-5.18), and absence of definitive or adjuvant RT (HR, 1.90; 95% CI, 1.01-3.59) were associated with worse OS. Conclusions and Relevance: This retrospective single-institution study found that lower tumor stage, younger age, and the ability to receive definitive or adjuvant RT were associated with improved OS in patients with ATC.

Primary Total Laryngectomy versus Organ Preservation for Locally Advanced T3/T4a Laryngeal Cancer.

OBJECTIVE: Organ preservation (OP) treatment for advanced laryngeal cancer has increased compared to primary total laryngectomy. Our study compares oncologic and functional outcomes between these approaches. STUDY DESIGN: Retrospective cohort study. SETTING: Single tertiary care institution. METHODS: Retrospective review of patients receiving primary total laryngectomy or OP for laryngeal cancer between 1/1/2000 and 12/31/2018. RESULTS: A total of 118 patients received primary total laryngectomy and 119 received OP. Overall survival was similar between total laryngectomy and OP. When stratified by T stage, disease-free survival was worse among T3 patients receiving OP versus total laryngectomy. In T3 patients, 28 OP patients experienced local recurrence (28.9%) compared to 3 total laryngectomy patients (7.1%; p < 0.01). In total, 20 OP patients with local recurrence received salvage surgery. These patients had similar overall survival to patients who underwent initial total laryngectomy (TL). About 14 OP patients with local recurrence did not receive salvage surgery. About 89 (75.4%) TL patients achieved normal diet as compared to 64 (53.8%) OP patients (p < 0.001). In TL patients, 106 (89.8%) received primary or secondary tracheoesophageal-prosthesis, 82 (77.4%) of whom achieved completely understandable speech. CONCLUSIONS: There was no difference in survival by treatment in T4 patients, possibly because of strict patient selection. However, disease-free survival was worse in T3 patients receiving OP, likely due to a high local recurrence rate. Approximately 40% of patients with local recurrence were not eligible for salvage laryngectomy. TL patients had comparable swallowing and speech outcomes with OP patients. LEVEL OF EVIDENCE: 3 Laryngoscope, 133:1122-1131, 2023.

Image analysis reveals differences in tumor multinucleations in Black and White patients with human papillomavirus-associated oropharyngeal squamous cell carcinoma.

BACKGROUND: Understanding biological differences between different racial groups of human papillomavirus (HPV)-associated oropharyngeal squamous cell carcinoma (OPSCC) patients, who have differences in terms of incidence, survival, and tumor morphology, can facilitate accurate prognostic biomarkers, which can help develop personalized treatment strategies. METHODS: This study evaluated whether there were morphologic differences between HPV-associated tumors from Black and White patients in terms of multinucleation index (MuNI), an image analysis-derived metric that measures density of multinucleated tumor cells within epithelial regions on hematoxylin-eosin images and previously has been prognostic in HPV-associated OPSCC patients. In this study, the authors specifically evaluated whether the same MuNI cutoff that was prognostic of overall survival (OS) and disease-free survival in their previous study, TTR , is valid for Black and White patients, separately. We also evaluated population-specific cutoffs, TB for Blacks and TW for Whites, for risk stratification. RESULTS: MuNI was statistically significantly different between Black (mean, 3.88e-4; median, 3.67e-04) and White patients (mean, 3.36e-04; median, 2.99e-04), with p = .0078. Using TTR , MuNI was prognostic of OS in the entire population with hazard ratio (HR) of 1.71 (p = .002; 95% confidence interval [CI], 1.21-2.43) and in White patients with HR of 1.72 (p = .005; 95% CI, 1.18-2.51). Population-specific cutoff, TW , yielded improved HR of 1.77 (p = .003; 95% CI, 1.21-2.58) for White patients, whereas TB did not improve risk-stratification in Black patients with HR of 0.6 (p = .3; HR, 0.6; 95% CI, 0.2-1.80). CONCLUSIONS: Histological difference between White and Black patient tumors in terms of multinucleated tumor cells suggests the need for considering population-specific prognostic biomarkers for personalized risk stratification strategies for HPV-associated OPSCC patients.

A Reappraisal of Definitive Chemoradiotherapy for Older Adults With Advanced Head and Neck Cancer.

BACKGROUND/AIM: Definitive treatment for locally advanced head and neck squamous cell carcinoma (LAHNSCC) is often compromised in older adults due to concerns about potential treatment toxicity intolerance. We reviewed our institutional experience with definitive management of older adults with LAHNSCC. PATIENTS AND METHODS: From our Institutional Review Board-approved registry, we identified patients aged >60 years with stage III-IV, M0 LAHNSCC (seventh/earlier editions of the American Joint Committee on Cancer classification) treated with definitive radiotherapy from 1993-2019. Indications for concurrent chemotherapy included T3-4 or N2-3 disease. Multivariable analysis using Fine and Gray regression was performed to identify risk factors associated with recurrence. The cumulative incidence method was used to calculate recurrence rates. RESULTS: Overall, 350 patients were identified: 223 aged 60-69, 82 aged 70-74, and 45 aged ≥75 years. Median follow-up was 36.3 months. Two-year recurrence rates were 13.7%, 20.2% and 34.8%, respectively; human papillomavirus-positive disease was present in 190 (85%), 44 (54%), and 25 (56%), respectively; and systemic therapy was given to 194 (87%), 64 (88%), and 23 (56%) patients, respectively. Factors significantly associated with increased risk of recurrence included age ≥75 years, Karnofsky performance status 70-80, clinical N2c-N3, and Charlson score 2-3. CONCLUSION: Patients aged ≥75 years received less aggressive therapy and experienced increased recurrence compared to younger patients. Outcomes for those aged 70-74 years were similar to younger patients treated with aggressive therapy, despite their inferior performance status/comorbidity, and such patients should not routinely be excluded from standard-of-care therapy. Further study is needed to optimize therapy for a redefined older adult (age ≥75 years) population.

Prognostic value of computed tomography scan detection of cartilage invasion in advanced laryngeal cancer treated with primary total laryngectomy.

BACKGROUND: We sought to determine whether detection of cartilage invasion (CI) by computed tomography predicts oncologic outcomes after primary total laryngectomy. METHODS: Retrospective cohort study comparing oncologic outcomes between radiologic versus pathologic diagnosis. RESULTS: Assessment of clear CI versus gestalt CI resulted in 84% versus 48% specificity, 90.9% versus 80.3% positive predictive value (PPV), 60.6% versus 80.3% sensitivity, 44.7% versus 48% negative predictive value (NPV), respectively. Disease-free survival (DFS) was similar between cT4a and cT3/cT2 patients (p = 0.87). DFS trended towards superiority among pT3/pT2 versus pT4a patients (p = 0.18). DFS was similar among patients with CI on radiologist gestalt versus no CI (p = 0.94). Histologically confirmed CI was associated with a hazard ratio (HR) of 1.46 (p = 0.27), gestalt CI 1.13 (p = 0.70), and clear CI 1.61 (p = 0.10) for DFS. CONCLUSION: Gestalt determination of CI results in high sensitivity but low specificity, while clear determination of CI results in moderate sensitivity and high specificity.

Variability in Depth of Invasion Measurements in Carcinomas of the Oral Cavity and the Effect on Pathologic Tumor Staging.

Depth of invasion (DOI) was added to the staging criteria for carcinoma of the lip and oral cavity in the 8th edition of the American Joint Committee on Cancer Staging Manual (AJCC8). However, there are multiple practical challenges to obtaining an accurate DOI measurement with limited data regarding interobserver variability in DOI measurement. The aim of this study was to investigate interobserver variability in DOI measurement and its effect on tumor stage. We performed an electronic medical record search for excisions of squamous cell carcinoma of the oral cavity between January 1, 2010 and December 25, 2017. All slides containing significant tumor were selected for independent blinded DOI measurement by four head and neck pathologists per AJCC8 guidelines. Pathologic stage was assigned in conjunction with reported tumor greatest dimension. Observers recorded the slide used for measurement and potential issues limiting assessment of DOI. Results were compared for reproducibility in DOI and tumor stage using intraclass correlation coefficient (ICC) analysis. A total of 167 cases of oral squamous cell carcinoma with available slides were included. The ICC score for DOI between observers was 0.91339 (> 0.9 considered excellent). Only 7.2% of cases had uniform DOI amongst observers. Increasing overall tumor size and average DOI correlated with increasing range in DOI amongst observers. Differences in DOI resulted in differences in pathologic tumor staging (pT) for 15% of tumors. Use of different slides for DOI measurements was significantly associated with different pT staging. In contrast, ulceration and exophytic growth did not correlate with higher DOI or pT variability. Despite the excellent ICC score, differences in DOI measurement resulted in variable pT staging for a considerable number of cases. We therefore recommend consensus for DOI in at least some cases in which potential differences in DOI could alter pT stage assignment.

Lung and Mediastinal Endobronchial Ultrasound-Guided Transbronchial Needle Aspiration in Young Adults.

INTRODUCTION: Endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA) is used to investigate pulmonary nodules, mediastinal lymphadenopathy, and mediastinal masses in both malignant and nonmalignant etiologies. EBUS-TBNA is most commonly used in the diagnosis and staging of patients with non-small-cell lung cancer in the middle-age and elderly populations. As lung cancer is uncommon in young adults, it is assumed that there are a distinct disease population and clinical background in young adults who undergo EBUS-TBNA. However, this population has not been well investigated. METHODS: We identified all EBUS-TBNA cases in young adults (aged 18-39 years) between January 1, 2008, and December 31, 2018, at our institution. Cytology diagnoses were correlated with the concurrent/subsequent histologic diagnosis and clinical decisions. A final patient classification was created based on the worst cytologic or histologic diagnosis (benign, low-grade, or malignant), with the exception of atypical cytology with subsequent long clinical follow-up with no evidence of malignancy, who were considered benign. All discordant cases and positive/suspicious cases with available slides were rereviewed together by the authors to confirm the diagnosis. RESULTS: In total, 257 EBUS-TBNA procedures were performed in 249 young adults (mean age of 31.2 years). The majority of indications were lymphadenopathy and lung nodule/mass. Final cytologic interpretations included 214 (83%) benign, 14 (5%) atypical, 5 (2%) low-grade neoplasm (carcinoid tumor), and 15 (6%) malignant cases. The final patient classification was 213 (86%) benign, 6 (2%) low-grade, and 30 (12%) malignant. Discordant results were found in 24 cases, most frequently due to sampling error (50%). Of 213 benign cases, 58% had granulomatous disease, with sarcoidosis being the most common, followed by histoplasmosis. Of 30 cases with a final malignant classification, metastatic tumor was the most common (n = 12, 4.8%), followed by primary lung tumor (n = 11, 4.4%) and lymphoma (n = 7, 2.8%). There was a variety of malignancies among primary lung cancer, including adenocarcinoma (n = 5), squamous-cell carcinoma (n = 3), inflammatory myofibroblastic tumor (n = 2), and epithelioid hemangioendothelioma (n = 1). CONCLUSION: In young adults, EBUS-TBNA was most frequently performed to evaluate lymphadenopathy and lung nodules, and granulomatous disease was the most common benign finding. Although rare, primary lung malignancies do occur in young adults along with metastasis from a variety of other sites, with sarcoma being the most common pathology.

Updated Outcomes of Split Course Radiotherapy in Elderly or Infirm Patients With Advanced Cancers of the Head and Neck.

BACKGROUND/AIM: Head and neck cancers are often treated with extended courses of radiotherapy (RT), which may prove excessively toxic for frail patients. Split course RT (SCRT) delivers two courses of RT separated by 4-6 weeks, personalizing treatment intensity based on response. In this study, we present our updated experience using this technique. PATIENTS AND METHODS: From a single institution database, we identified patients considered for SCRT. For patients undergoing a second course of RT, cumulative incidence of locoregional recurrence (LRR) and overall survival (OS) are reported. RESULTS: A total of 98 patients were included, of whom seventy-five percent underwent a second course of RT. The most common fractionation was 30 Gy in 10 fractions for each course, with a median cumulative dose of 60 Gy. In those undergoing a second course of RT, median OS was 9.7 months and cumulative incidence of LRR at 6, 12, and 24 months was 17.0%, 23.1%, and 29.4%, respectively. CONCLUSION: SCRT offers an attractive treatment paradigm to personalize radiation intensity based on patient tolerance, while maintaining reasonable safety and efficacy in those unfit for standard full course RT.

Impact of education on institutional and faculty rates of atypical squamous cells.

INTRODUCTION: Papanicolaou test quality metrics include the ASC rate, ASC:SIL ratio, and ASC HPV+ rate. What a laboratory should do when metrics show a worrisome trend is not well defined. In 2015, our laboratory noted a worrisome trend in our quality metrics and decided to implement a systemic education program in 2016; we monitored the effectiveness of our program. METHODS: An educational intervention was designed for March/April 2016. Cytotechnologist education consisted of: group meeting on March 10 to discuss metrics, lecture, and written materials on ASC-US criteria, a quiz on challenging ASC-US cases, encouragement to seek consultation, and each cytotechnologist received quarterly individual metrics. The cytopathologist education consisted of: group meeting on April 16 to discuss metrics, encouragement to bring borderline cases to consensus conference, and each faculty received quarterly individual metrics. The ASC rate, ASC:SIL ratio, and ASC HPV+ rate was collected for the institution and each individual faculty in 2016 for January to March (pre-interventions, Q1), April to June (post-interventions, Q2), and July to September (post-interventions, Q3). ASC-H was included in the calculation of ASC %, ASC:SIL, and ASC HPV+ rates. RESULTS: There was a substantial decline in the lab ASC rate and ASC:SIL ratio, and the ASC HPV+ rate increased. Individual faculty changes in ASC:SIL ratio and ASC HPV+ rate also improved. CONCLUSIONS: In our institution, an educational program has been very effective in improving Papanicolaou test metrics. It is helpful to perform re-education at all levels within the department.

Spindle cell neoplasms of the upper gastrointestinal tract, hepatobiliary tract, and pancreas by fine needle aspiration: A single institutional experience of 15 years with follow-up data.

BACKGROUND: The diagnosis of spindle cell neoplasms (SCN) of the upper gastrointestinal (GI) tract, hepatobiliary tract, and pancreas detected by fine needle aspiration (FNA) is challenging. We describe a single-center experience of these samples with follow-up data and characterization of the morphologic findings. METHODS: We retrospectively reviewed pathology records for all FNAs diagnostic for or suggestive of SCN on esophagus, stomach, small bowel, liver, and pancreas in a 15 year period. All cases with at least 6 month follow-up were included. Surgical material (biopsy or resection) was the diagnostic gold standard. All FNAs with subsequent surgical specimens were reviewed and assessed for cellularity, architectural features, and nuclear features. RESULTS: In 15 years, 5101 FNAs of the upper GI tract, hepatobiliary tract, and pancreas were performed. SCN was diagnosed in 98 (2%) patients. Seventy-two patients had definitive pathologic diagnoses: 68 were neoplastic and four were non-neoplastic. Cytomorphologic review in relationship to final diagnosis revealed three statistically significant features: low cellularity favors a benign process (P = .00544), epithelioid nuclear morphology favors malignancy (P = .00278), and identification of perinuclear vacuoles favors a diagnosis of GIST over non-GIST SCN (P = .04236). CONCLUSIONS: Among cases with follow-up, final pathologic diagnoses were SCN in 94% of cases diagnosed as SCN on FNA of upper GI, hepatobiliary tract, and pancreas. Although some cytomorphologic criteria are more suggestive of malignancy, arriving at a specific diagnosis relies on collaboration of clinical, radiologic, cytomorphologic, and immunohistochemical data.

Implementation of a Quality and Patient Safety Curriculum for Pathology Residency Training.

Quality and Patient Safety education for resident physicians is necessary to prepare them for independent practice and to meet accreditation requirements. Integrating such education into the residents' routine work can provide them with valuable practical experience, while advancing the institution's quality priorities. We committed to Quality and Patient Safety education for our pathology residents but found no published program that met their specific needs. To fill this gap in pathology residency education, we designed and implemented a new curriculum that spans the 4-year duration of residency training. Curriculum content was drawn from the pathology milestones, and educational strategies were based on the principles of adult learning. The curriculum was implemented in the 2018 to 19 academic year, and residents were assessed before and after their participation. The residents engaged in several Quality and Patient Safety activities and projects under faculty supervision, and improved their scores on objective assessments (Quality and Patient Safety quiz and in-service examination). Implementation was facilitated by a Quality and Patient Safety chief resident, and the recruitment of faculty with demonstrated Quality and Patient Safety interest. Our comprehensive Quality and Patient Safety curriculum is feasible to implement and can help pathology residents develop the knowledge and skills needed to lead quality initiatives. We believe that the curriculum framework is readily adaptable to other residency programs.

The Role of Ultrasound-Guided Fine-Needle Aspiration of Thyroid Bed Lesions and Clinical Predictors of Recurrent Papillary Thyroid Carcinoma.

OBJECTIVES: Fine-needle aspiration (FNA) of thyroid bed lesions after thyroidectomy is challenging to evaluate. We determined the sensitivity, specificity, and positive and negative predicative value of thyroid bed FNA (TB-FNA) for detecting local recurrence of thyroid carcinoma. METHODS: A retrospective search was conducted for TB-FNAs from patients with a prior thyroid resection and subsequent ipsilateral FNA from the thyroid bed. Clinical and pathologic data were retrieved from the medical record. Patients were ultimately classified as "malignant" or "benign" based on the worst pathology identified and follow-up available. RESULTS: Forty-two cases were included, and the prior thyroidectomy pathology included 36 papillary thyroid carcinomas, two follicular carcinomas, one medullary carcinoma, and three benign cases. TB-FNA was adequate in 38 (90.5%) cases and interpreted as positive for malignancy (n = 22; 52.4%), suspicious for follicular neoplasm (n = 3; 7.1%), atypia of unknown significance (n = 2; 4.8%), and benign (n = 10; 23.8%). Twenty-seven patients had histologic follow-up, and 24 (87.5%) showed recurrent malignancy. The cytology sensitivity, specificity, positive predictive value, negative predictive value, and accuracy were 96%, 100%, 100%, 92.3%, and 97.4%, respectively, for identification of recurrent malignancy. CONCLUSIONS: Most TB-FNA cases ultimately were diagnosed with malignancy on follow-up, although there may be sampling bias, as not all clinically benign cases had surgical follow-up.

Identifying an oligometastatic phenotype in HPV-associated oropharyngeal squamous cell cancer: Implications for clinical trial design.

OBJECTIVES: Patients with human papillomavirus (HPV) associated squamous cell carcinoma of the oropharynx (SCC-OP) have improved overall survival (OS) after distant metastasis (DM) compared to HPV negative patients. These patients may be appropriate candidates for enrollment on clinical trials evaluating the efficacy of metastasis-directed therapy (MDT). This study seeks to identify prognostic factors associated with OS after DM, which could serve as enrollment criteria for such trials. MATERIALS AND METHODS: From an IRB approved multi-institutional database, we retrospectively identified patients with HPV/p16 positive SCC-OP diagnosed between 2001 and 2018. Patterns of distant failure were assessed, including number of lesions at diagnosis and sites of involvement. The primary outcome was OS after DM. Prognostic factors for OS after DM were identified with Cox proportional hazards. Stepwise approach was used for multivariable analysis. RESULTS: We identified 621 patients with HPV-associated SCC-OP, of whom 82 (13.2%) were diagnosed with DM. Median OS after DM was 14.6 months. On multivariable analysis, smoking history and number of lesions were significantly associated with prolonged OS. Median OS after DM by smoking (never vs ever) was 37.6 vs 11.2 months (p = 0.006), and by lesion number (1 vs 2-4 vs 5 or more) was 41.2 vs 17.2 vs 10.8 months (p = 0.007). CONCLUSION: Among patients with newly diagnosed metastatic HPV-associated SCC-OP, lesion number and smoking status were associated with significantly prolonged overall survival. These factors should be incorporated into the design of clinical trials investigating the utility of MDT, with or without systemic therapy, in this population.

Characteristics and Outcomes in Head and Neck Sarcomatoid Squamous Cell Carcinoma: The Cleveland Clinic Experience.

OBJECTIVES: To analyze characteristics, treatment outcomes, and prognostic factors of sarcomatoid squamous cell carcinoma of the head and neck. STUDY DESIGN: Retrospective chart review. SETTING: Tertiary care center. SUBJECTS AND METHODS: Fifty-five patients were treated for sarcomatoid squamous cell carcinoma of the head and neck between 1996 and 2018. Data collection included clinical history, tumor characteristics, pathology, treatment modality, and outcomes. Mean follow up was 17.1 months. Cox univariate analysis was used to evaluate for associations with locoregional recurrence, distant metastasis, and overall survival. RESULTS: Most patients were white males with a smoking history and median age 66 years (range 41-92) at diagnosis. Twenty-two percent had prior head and neck radiation. Tumor site was most frequently oral cavity (41.8%), followed by larynx (29.1%), and oropharynx (16.4%). Half presented with early T stage disease (15.5% T0, 12.7% T1, 30.9% T2) and the remainder with late stage disease (16.4% T3, 34.5% T4). Locoregional recurrence rate was 60.0%, metastatic recurrence was rate 21.8%, with median time to recurrence of 4 months and mean overall survival of 20 months. Presence of lymphovascular space invasion was statistically associated with locoregional recurrence (P = .018, HR 3.55 [95% CI 1.24, 10.14]) and poorer overall survival (P = .015, HR 2.92 [95% CI 1.23, 4.80]). Treatment with multimodality therapy was associated with decreased locoregional recurrence (P = .039, HR 0.39 [95% CI 0.16, 0.95]) but did not impact overall survival. CONCLUSION: Sarcomatoid squamous cell carcinoma remains a rare and aggressive disease variant with high recurrence rates and high mortality. High risk features such as lymphovascular space may indicate the need for more aggressive therapy.

Cytopathology milestones: can you get to level 5?

INTRODUCTION: ACGME Milestones describe 6 areas of proficiency, indicating readiness for practice. Each is divided into 5 levels of mastery; Level 1 (new trainees) through Levels 4 (graduation) and 5 (aspirational). Milestones reporting began Spring 2016. We used Milestones to assess graduated fellows. MATERIALS AND METHODS: We conducted phone interviews with previous fellows and collected demographic information including practice setting. We asked graduates if they fulfilled each example of mastery and recorded their answers. RESULTS: A total of 22 fellows graduated from 2010 to 2017; 15 responded (10 academic, 5 private). Milestones in which nearly all respondents performed well (Level 4+) were: PC1, MK1, SBP2, SBP4, PROF1-4, ICS1-3. Some were more challenging (PC2, MK2, SBP1/3/5, PBL1). For PC2, 2 respondents achieved Level 1 (did not perform fine-needle aspirations). For MK2, 2 respondents achieved Level 1 (did not evaluate Papanicolaou). For SBP1, 80% in private practice achieved Level 5; 50% in academics achieved Level 3. For SBP3, 80% in private practice achieved Level 4+; 100% in academics achieved maximum Level 2. For SBP5, 60% of all respondents achieved maximum Level 3; only 1 achieved Level 5. CONCLUSIONS: Many Milestones are attainable. Eleven of 18 yielded Level 4+ from most respondents. Three (PC2, MK1, MK2) yielded rare Level 1 due to scope of practice. Others (SBP1, SBP3) reflect more of an all-or-nothing phenomenon. For SBP5, most respondents achieved Level 3; only 1 achieved Level 5. Some Milestones are highly dependent on practice setting, and others remain aspirational.

Paraganglioma-like medullary thyroid carcinoma: A case report and literature review.

Medullary thyroid carcinoma (MTC) accounts for 3%-5% of all thyroid malignancies. Most MTC can be diagnosed by their typical cytologic and histologic morphology and immunohistochemical features. However, some rare variants of MTC may pose diagnostic difficulties on both cytology and histology. Paraganglioma-like MTC (PLMTC) is a rare, but widely recognized variant of MTC. PLMTC is known to share morphological and architectural similarities with paraganglioma, hyalinizing trabecular tumor, and carcinomas of thyroid follicular cell origin, such as follicular carcinoma and follicular variant of papillary thyroid carcinoma. The combination of clinicopathologic features and a battery of immunohistochemical markers is essential for making a correct diagnosis. Herein, we report one case of PLMTC with both cytologic and histologic features and review the clinicopathologic features of previously reported cases.

Impact of routine surveillance imaging on detecting recurrence in human papillomavirus associated oropharyngeal cancer.

OBJECTIVES: This study examines the utility of surveillance imaging in detecting locoregional failures (LRF), distant failures (DF) and second primary tumors (SPT) in patients with human papillomavirus (HPV) associated oropharyngeal cancer (OPC) after definitive chemoradiotherapy (CRT). METHODS AND MATERIALS: An institutional database identified 225 patients with biopsy proven, non- metastatic HPV+ OPC treated with definitive CRT between 2004 and 2015, whose initial post-treatment imaging was negative for disease recurrence (DR). Two groups were defined: patients with <2 scans/year Group 1 and patients with ≥2 scans/year Group 2. The Mann-Whitney test or Chi-square was used to determine differences in baseline characteristics between groups. Fine & Gray regression was used to detect an association between imaging frequency, DR and diagnosis of SPT. RESULTS: Median follow up was 40.8 months. 30% of patients had ≥T3 disease and 90% had ≥ N2 disease (AJCC 7th edition). Twenty one failures (9.3%) were observed, 7 LRF and 15 DF. Six LRF occurred within 24 months and 14 DF occurred within 36 months of treatment completion. Regression analysis showed Group 2 had increased risk of DR compared to Group1 (HR 10.3; p = 0.002) albeit with more advanced disease at baseline. Five SPT were found (2 lung, 2 esophagus, and 1 oropharynx) between 4.5 and 159 months post-CRT. CONCLUSION: Surveillance imaging seems most useful in the first 2-3 years post treatment, and is particularly important in detecting DF. Surveillance scans for SPT has a low yield, but should be considered for those meeting lung cancer screening guidelines.