All Publications

  • The Use of Panitumumab-IRDye800CW in a Novel Murine Model for Conjunctival Squamous Cell Carcinoma. Translational vision science & technology Youn, G. M., Case, A. G., Jarin, T., Li, B., Swarup, A., Naranjo, A., Bou-Khalil, C., Yao, J., Zhou, Q., Hom, M. E., Rosenthal, E. L., Wu, A. Y. 2022; 11 (7): 23


    Purpose: Conjunctival squamous cell carcinoma (SCC) is a sight-threatening ocular surface malignancy with the primary treatment modality being surgical resection. To evaluate surgical imaging modalities to improve surgical resection, we established a novel murine model for conjunctival SCC to demonstrate the utility of panitumumab-IRDye800, a fluorescently labeled anti-epidermal growth factor receptor (EGFR) antibody.Methods: NOD-scid IL2Rgammanull (NSG) mice received subconjunctival injection of UM-SCC-1 or SCC-9, head and neck SCC cell lines. On tumor growth, mice were injected with Panitumumab-IRDye800CW, and imaged with a small animal imaging system and optical coherence tomography (OCT). Immunohistochemistry for SCC markers were used to confirm tumor origin.Results: Seventy-five percent (N = 4) of the UM-SCC-1 group developed aggressive, rapidly growing tumors that were P40 and EGFR positive within two weeks of inoculation. The SCC-9 tumors failed to demonstrate any growth (N = 4). Ocular tumors demonstrated high fluorescence levels with a tumor to background ratio of 3.8.Conclusions: Subconjunctival injections are an appropriate technique to create in vivo models for assessing treatment modalities and novel therapies in conjunctival SCC.Translational Relevance: This model demonstrates Panitumumab-IRDye800CW's utility in the ophthalmic setting and suggests that clinical trials may be warranted.

    View details for DOI 10.1167/tvst.11.7.23

    View details for PubMedID 35895055

  • Revision Rates of Septoplasty in the United States. Facial plastic surgery & aesthetic medicine Youn, G. M., Shah, J. P., Wei, E. X., Kandathil, C., Most, S. P. 2022


    Background: Large-scale studies characterizing septoplasty revision rates are lacking. Objectives: To identify rates of septoplasty revision in the United States. Methods: Patients undergoing initial septoplasty between January 1, 2007 and December 31, 2013 were identified using the IBM MarketScan Commercial Database. Patients were excluded if they had nasal vestibular stenosis, rhinoplasty, or costal cartilage grafts for the initial surgery, or did not have either septoplasty, nasal vestibular stenosis, rhinoplasty, and/or costal cartilage grafts for the second surgery. Results: 295,236 patients received an initial septoplasty, and 3213 (1.1%) patients underwent a revision. Among the revision group, 178 (5.4%) patients received a septorhinoplasty, among which 13 (7.3%) required a costal cartilage graft. Older patients were less likely to need revision surgery (RS). Patients in the Northeast and West were significantly more likely than patients in the Midwest to undergo RS. Insurance plans such as comprehensive and point-of-service were associated with greater odds of RS, whereas others such as high-deductible health plans were associated with lower odds. Conclusion: Septoplasty revision rates are relatively low at 1.1% but influenced by age, region, and insurance plan.

    View details for DOI 10.1089/fpsam.2022.0009

    View details for PubMedID 35394347

  • Acromioclavicular Joint Repair Using a Suture Cerclage Tensioning System ARTHROSCOPY TECHNIQUES Youn, G., Chakrabarti, M. O., McGahan, P. J., Chen, J. L. 2019; 8 (12): E1555-E1560


    Injuries to the acromioclavicular (AC) joint are common among adults in their twenties and account for 8% of all joint dislocations. Although there are numerous operative approaches to treating AC joint separations, a gold standard does not exist because of lack of conclusive evidence supporting the use of 1 standard technique. In this Technical Note and accompanying video, we describe an anatomic AC joint repair using a suture cerclage tensioning system to accurately control the reduction and improve the precision and outcomes of the repair.

    View details for DOI 10.1016/j.eats.2019.08.006

    View details for Web of Science ID 000503877200019

    View details for PubMedID 31890537

    View details for PubMedCentralID PMC6928360

  • Arthroscopic-Assisted Osteochondral Allograft Transplantation for Posterolateral Lesions of the Talus Without Fibular Osteotomy. Arthroscopy techniques Youn, G. M., Rosinski, A., Gwosdz, J., Chakrabarti, M., Elena, N., Woodall, B. M., Shimizu, M., McGahan, P. J., Chen, J. L. 2019; 8 (3): e311-e316


    Osteochondral lesions of the talus are chondral defects often caused by acute trauma to the ankle such as sprains and fractures. If operative treatment is necessary, microfracture, cartilage replacement, and autologous chondrocyte implantation can be used. We describe a single-step osteochondral allograft transfer to access the posterolateral talar dome that avoids the need for a fibular osteotomy and therefore eliminates morbidity while reducing operative time.

    View details for DOI 10.1016/j.eats.2018.11.009

    View details for PubMedID 31016127

    View details for PubMedCentralID PMC6475624

  • Arthroscopic Bone Marrow Aspirate Concentrate Harvesting From the Intercondylar Notch of the Knee ARTHROSCOPY TECHNIQUES Youn, G., Woodall, B. M., Elena, N., Shin, E. C., Pathare, N., McGahan, P. J., Chen, J. L. 2018; 7 (11): E1173-E1176


    Bone marrow aspirate concentrate is commonly harvested to obtain mesenchymal stem cells, progenitor cells, and growth factors. The iliac crest is the most common donor site for bone marrow harvesting and is associated with donor site morbidity of an additional incision and pain from the harvest. Iliac crest harvesting can be cumbersome because it often requires different patient positioning from the surgical procedure and additional sedation or anesthesia for the harvest prior to repositioning. The purpose of this Technical Note and accompanying video is to describe a technique to arthroscopically aspirate bone marrow from the intercondylar femoral notch, reducing the need for iliac crest harvesting.

    View details for DOI 10.1016/j.eats.2018.07.016

    View details for Web of Science ID 000451394100016

    View details for PubMedID 30533365

    View details for PubMedCentralID PMC6261716