All Publications

  • International Multicenter Study of Clinical Outcomes of Sinonasal Melanoma Shows Survival Benefit for Patients Treated with Immune Checkpoint Inhibitors and Potential Improvements to the Current TNM Staging System JOURNAL OF NEUROLOGICAL SURGERY PART B-SKULL BASE Lechner, M., Takahashi, Y., Turri-Zanoni, M., Ferrari, M., Liu, J., Counsell, N., Mattavelli, D., Rampinelli, V., Vermi, W., Lombardi, D., Saade, R., Park, K., Schartinger, V. H., Franchi, A., Facco, C., Sessa, F., Battocchio, S., Fenton, T. R., Vaz, F. M., O'Flynn, P., Howard, D., Stimpson, P., Wang, S., Hannan, S., Unadkat, S., Hughes, J., Dwivedi, R., Forde, C. T., Randhawa, P., Gane, S., Joseph, J., Andrews, P. J., Dave, M., Fleming, J. C., Thomson, D., Zhu, T., Teschendorff, A., Royle, G., Steele, C., Jimenez, J. E., Laco, J., Wang, E. W., Snyderman, C., Lacy, P. D., Woods, R., O'Neill, J. P., Saraswathula, A., Kaur, R., Zhao, T., Ramanathan, M., Gallia, G. L., London, N. R., Le, Q., West, R. B., Patel, Z. M., Nayak, J. V., Hwang, P. H., Hermsen, M., Llorente, J., Facchetti, F., Nicolai, P., Bossi, P., Castelnuovo, P., Jay, A., Carnell, D., Forster, M. D., Bell, D. M., Lund, V. J., Hanna, E. Y. 2022
  • Clinical outcomes, Kadish-INSICA staging and therapeutic targeting of somatostatin receptor 2 in olfactory neuroblastoma. European journal of cancer (Oxford, England : 1990) Lechner, M., Takahashi, Y., Turri-Zanoni, M., Liu, J., Counsell, N., Hermsen, M., Kaur, R. P., Zhao, T., Ramanathan, M. J., Schartinger, V. H., Emanuel, O., Helman, S., Varghese, J., Dudas, J., Riechelmann, H., Sprung, S., Haybaeck, J., Howard, D., Engel, N. W., Stewart, S., Brooks, L., Pickles, J. C., Jacques, T. S., Fenton, T. R., Williams, L., Vaz, F. M., O'Flynn, P., Stimpson, P., Wang, S., Hannan, S. A., Unadkat, S., Hughes, J., Dwivedi, R., Forde, C. T., Randhawa, P., Gane, S., Joseph, J., Andrews, P. J., Royle, G., Franchi, A., Maragliano, R., Battocchio, S., Bewicke-Copley, H., Pipinikas, C., Webster, A., Thirlwell, C., Ho, D., Teschendorff, A., Zhu, T., Steele, C. D., Pillay, N., Vanhaesebroeck, B., Mohyeldin, A., Fernandez-Miranda, J., Park, K. W., Le, Q., West, R. B., Saade, R., Manes, R. P., Omay, S. B., Vining, E. M., Judson, B. L., Yarbrough, W. G., Sansovini, M., Silvia, N., Grassi, I., Bongiovanni, A., Capper, D., Schuller, U., Thavaraj, S., Sandison, A., Surda, P., Hopkins, C., Ferrari, M., Mattavelli, D., Rampinelli, V., Facchetti, F., Nicolai, P., Bossi, P., Henriquez, O. A., Magliocca, K., Solares, C. A., Wise, S. K., Llorente, J. L., Patel, Z. M., Nayak, J. V., Hwang, P. H., Lacy, P. D., Woods, R., O'Neill, J. P., Jay, A., Carnell, D., Forster, M. D., Ishii, M., London, N. R., Bell, D. M., Gallia, G. L., Castelnuovo, P., Severi, S., Lund, V. J., Hanna, E. Y. 1800


    INTRODUCTION: Olfactory neuroblastoma (ONB) is a rare cancer of the sinonasal region. We provide a comprehensive analysis of this malignancy with molecular and clinical trial data on a subset of our cohort to report on the potential efficacy of somatostatin receptor 2 (SSTR2)-targeting imaging and therapy.METHODS: We conducted a retrospective analysis of 404 primary, locally recurrent, and metastatic olfactory neuroblastoma (ONB) patients from 12 institutions in the United States of America, United Kingdom and Europe. Clinicopathological characteristics and treatment approach were evaluated. SSTR2 expression, SSTR2-targeted imaging and the efficacy of peptide receptor radionuclide therapy [PRRT](177Lu-DOTATATE) were reported in a subset of our cohort (LUTHREE trial; NCT03454763).RESULTS: Dural infiltration at presentation was a significant predictor of overall survival (OS) and disease-free survival (DFS) in primary cases (n=278). Kadish-Morita staging and Dulguerov T-stage both had limitations regarding their prognostic value. Multivariable survival analysis demonstrated improved outcomes with lower stage and receipt of adjuvant radiotherapy. Prophylactic neck irradiation significantly reduces the rate of nodal recurrence. 82.4% of the cohort were positive for SSTR2; treatment of three metastatic cases with SSTR2-targeted peptide-radionuclide receptor therapy (PRRT) in the LUTHREE trial was well-tolerated and resulted in stable disease (SD).CONCLUSIONS: This study presents pertinent clinical data from the largest dataset, to date, on ONB. We identify key prognostic markers and integrate these into an updated staging system, highlight the importance of adjuvant radiotherapy across all disease stages, the utility of prophylactic neck irradiation and the potential efficacy of targeting SSTR2 to manage disease.

    View details for DOI 10.1016/j.ejca.2021.09.046

    View details for PubMedID 34980502

  • Round Cell Sarcoma with EWSR1-PATZ1 Gene Fusion in the Neck: Case Report and Review of the Literature. The Laryngoscope Park, K. W., Cai, Y., Benjamin, T., Qorbani, A., George, J. 2020; 130 (12): E833-E836


    EWSR1-PATZ1 is a rare gene fusion recently recognized to occur in round and spindle cell sarcomas. To date, fewer than 20 cases have been described in the literature. However, no dedicated case reports have detailed its presentation in the head and neck region. We recently cared for a 52-year-old woman with an isolated, single right level 5A cervical mass. Excisional biopsy at an external hospital revealed pathology results consistent with EWSR1-PATZ1 polyphenotypic round and spindle cell sarcoma. The patient subsequently underwent surgical excision of the tumor and right neck lymph node dissection followed by adjuvant chemoradiation. Laryngoscope, 2020.

    View details for DOI 10.1002/lary.28554

    View details for PubMedID 32134119

  • Retrospective Analysis of Patients With Acute Invasive Fungal Rhinosinusitis in a Single Tertiary Academic Medical Center: A 10-Year Experience. American journal of rhinology & allergy Vengerovich, G., Echanique, K. A., Park, K. W., Wells, C., Suh, J. D., Lee, J. T., Wang, M. B. 2020; 34 (3): 324-330

    View details for DOI 10.1177/1945892419896233

    View details for PubMedID 31852212

  • Contrast-Induced Sialadenitis of the Sublingual Glands. Case reports in otolaryngology Park, K. W., Han, A. Y., Kim, C. M., Tam, K., Chhetri, D. K. 2020; 2020: 8851382


    Contrast-induced sialadenitis (CIS) is a rare, delayed pseudoallergic reaction from iodine containing contrast. Previously reported cases of CIS demonstrated that the two major salivary glands (parotid and submandibular) can be affected. The initial encounter of this entity can raise alarms to physicians as the differential diagnoses include serious infectious and inflammatory conditions such as Ludwig's angina and angioedema. Subsequently, it may lead to unnecessary testing and increased healthcare cost. Here we present a 60-year-old male who presented with bilateral sublingual gland swelling following exposure to iodinated contrast. With timely diagnosis by the otolaryngologist, the patient received conservative management that led to a full resolution within a few days. To date, this is the first case of CIS only involving the sublingual glands. We conclude that CIS can involve any of the major salivary glands.

    View details for DOI 10.1155/2020/8851382

    View details for PubMedID 32963864

  • Readmissions after endoscopic skull base surgery: associated risk factors and prevention. International forum of allergy & rhinology Vengerovich, G., Park, K. W., Antoury, L., Wells, C., Suh, J. D., Lee, J. T., Heaney, A. P., Bergsneider, M., Wang, M. B. 2020; 10 (1): 110-113


    Unplanned readmissions within 30 days of discharge is a quality measure introduced by the Centers for Medicare Services. This measure has been used to rate hospital quality and also to penalize hospitals for excess readmissions. It has been hypothesized that shorter hospital stays and fewer readmissions are associated with endoscopic skull base procedures. In this study we analyze endoscopic skull base procedures performed at our institution over a 10-year period to identify rates and factors associated with readmissions after endoscopic skull base surgery.A retrospective chart review was performed at a tertiary care academic medical center identifying patients who underwent endoscopic skull base surgery over the past 10 years. Data on patient demographics and tumor variables, as well as patient variables such as body mass index (BMI), revision surgery, history of skull base radiation, medical comorbidities, intraoperative cerebrospinal fluid (CSF) leaks, and postoperative CSF leaks, were recorded.Eight hundred thirty-three patients were included in our study. Sixty-one patients (7.3%) were readmitted a total of 66 times within 30 days. The most common reasons were as follows: hyponatremia (n = 18); CSF leak (n = 17); epistaxis (n = 3); diabetes insipidus (n = 3); rhinorrhea (n = 3); as well as other reasons. Statistical analysis revealed that the presence of intraoperative CSF leak was the only statistically significant variable associated with increased rate of readmissions within 30 days of discharge (p < 0.001).Presence of intraoperative CSF leak was the only statistically significant variable associated with an increased risk for readmission after surgery. Other tumor and patient variables were not associated with an increased risk of readmission within 30 days.

    View details for DOI 10.1002/alr.22453

    View details for PubMedID 31589814

  • Decreasing Use of Radioactive Iodine for Low-Risk Thyroid Cancer in California, 1999 to 2015. The Journal of clinical endocrinology and metabolism Park, K. W., Wu, J. X., Du, L., Leung, A. M., Yeh, M. W., Livhits, M. J. 2018; 103 (3): 1095-1101


    Routine radioactive iodine (RAI) ablation for low-risk differentiated thyroid cancer (DTC) is not supported by current practice guidelines.To assess recent stage-specific trends in use of RAI ablation.Retrospective study of patients with DTC (1999 to 2015) identified from the California Cancer Registry. Statistical analysis included standardized differences, P values, and multivariable analyses using RAI as the predictor variable.Trends and drivers of RAI ablation for low-risk DTC.Of 46,906 patients with DTC who underwent near-total or total thyroidectomy [mean age 48.2 ± 15.5 (standard deviation) years, 77% female), 25,457 (54%) received RAI. The proportion of patients with regional/distant disease who received RAI remained stable at 68%. Use of RAI for patients with localized disease (no extrathyroidal extension, lymph node, or distant metastases) decreased from 55% (1999) to 30% (2015), with the most substantial change occurring in tumors <1 cm (39% to 11%). The rate also decreased for localized tumors between 1 and 2 cm (62% to 34%) and 2 and 4 cm (67% to 49%) and remained stable at 59% for tumors >4 cm. In multivariable analyses, patients with localized disease were less likely to receive RAI if they were >65 years old [odds ratio (OR) 0.77, 95% confidence interval (CI): 0.71 to 0.83], had tumors <1 cm (OR 0.33, 95% CI: 0.31 to 0.35), or were treated in an academic hospital (OR 0.71, 95% CI: 0.67 to 0.75).The rate of RAI ablation decreased over time, mainly attributable to decreased use for localized DTCs <2 cm. Many patients with low-risk DTC still receive RAI unnecessarily.

    View details for DOI 10.1210/jc.2017-02269

    View details for PubMedID 29267880

  • Intraventricular and interventricular cellular heterogeneity of inotropic responses to α(1)-adrenergic stimulation. American journal of physiology. Heart and circulatory physiology Chu, C., Thai, K., Park, K. W., Wang, P., Makwana, O., Lovett, D. H., Simpson, P. C., Baker, A. J. 2013; 304 (7): H946-53


    α1-Adrenergic receptors (α1-ARs) elicit a negative inotropic effect (NIE) in the mouse right ventricular (RV) myocardium but a positive inotropic effect (PIE) in the left ventricular (LV) myocardium. Effects on myofilament Ca(2+) sensitivity play a role, but effects on Ca(2+) handling could also contribute. We monitored the effects of α1-AR stimulation on contraction and Ca(2+) transients using single myocytes isolated from the RV or LV. Interestingly, for both the RV and LV, we found heterogeneous myocyte inotropic responses. α1-ARs mediated either a PIE or NIE, although RV myocytes had a greater proportion of cells manifesting a NIE (68%) compared with LV myocytes (36%). Stimulation of a single α1-AR subtype (α1A-ARs) with a subtype-selective agonist also elicited heterogeneous inotropic responses, suggesting that the heterogeneity arose from events downstream of the α1A-AR subtype. For RV and LV myocytes, an α1-AR-mediated PIE was associated with an increased Ca(2+) transient and a NIE was associated with a decreased Ca(2+) transient, suggesting a key role for Ca(2+) handling. For RV and LV myocytes, α1-AR-mediated decreases in the Ca(2+) transient were associated with increased Ca(2+) export from the cell and decreased Ca(2+) content of the sarcoplasmic reticulum. In contrast, for myocytes with α1-AR-induced increased Ca(2+) transients, sarcoplasmic reticulum Ca(2+) content was not increased, suggesting that other mechanisms contributed to the increased Ca(2+) transients. This study demonstrates the marked heterogeneity of LV and RV cellular inotropic responses to stimulation of α1-ARs and reveals a new aspect of biological heterogeneity among myocytes in the regulation of contraction.

    View details for DOI 10.1152/ajpheart.00822.2012

    View details for PubMedID 23355341

    View details for PubMedCentralID PMC3625891