Dr. Sung Won  Kim  Md image

Dr. Sung Won Kim Md

8268 164Th St
Jamaica NY 11432
718 833-3225
Medical School: Other - Unknown
Accepts Medicare: No
Participates In eRX: No
Participates In PQRS: No
Participates In EHR: No
License #: 153427
NPI: 1205926532
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How to Expose the Entire Sella Floor With Minimal Manipulation During an Endoscopic Endonasal Transsphenoidal Approach. - The Journal of craniofacial surgery
A method of opening the posterior ethmoid air cells with minimal manipulation is important for adequate exposure of the sella floor and minimal nasal morbidity.Between February 2009 and August 2016, 373 patients with skull-base tumors underwent surgery via endoscopic endonasal transsphenoidal approach with the 2-nostrils/4-hands technique using this technique.A linear incision was made laterally toward one-third of the superior turbinate along the superior border of the sphenoid sinus ostium. Then, the superior turbinate mucosa was fully elevated to expose the superior turbinate bone. This allowed us to expose the entire sella floor and adjacent vital structures, such as the optic and carotid protuberances, medial and lateral opticocarotid recesses, planum sphenoidale, and clivus, leaving the superior turbinate and surrounding nasal mucosa intact.This technique could improve the manipulability of surgical instruments and increase the accessibility of the parasellar region. This approach better conserves the nasal mucosa, posterior ethmoid, and superior and supreme turbinates and more efficiently exposes skull-base tumors than traditional methods with pathology of the anterior cranial fossa and parasellar region. This technique also prevents the drilling procedure from damaging the surrounding nasal mucosa, including the exfoliated and laterally preserved posterior sphenoid mucosa.
Robust tissue growth and angiogenesis in large-sized scaffold by reducing H2O2-mediated oxidative stress. - Biofabrication
The implantation of cell-seeded large-sized scaffold often results in insufficient tissue regeneration, which is still a challenge for successful grafting. Excess hydrogen peroxide (H2O2) released by cells propagates oxidative stress, which is the primary cause of tissue injury leading to failure in tissue regeneration. Hence, preventing tissue from oxidative damage becomes imperative. For the first time, we entrapped catalase, an antioxidant in a scaffold as a novel approach in bioengineering to prevent tissue from H2O2-induced damage. The gel prepared from the mixture of decellularized adipose tissue and high viscous sodium alginate was used to entrap the catalase, and was coated to 3D polycaprolactone porous scaffolds. This study showed that our 3D design would regulate the release of catalase in a sustained and efficient manner protecting human turbinate mesenchymal stem cells cultured in 2D/3D in vitro oxidative microenvironment provided by H2O2, and supporting their robust growth. Interestingly, in vivo study revealed that our design was successful in tissue engineering by both an increase in tissue growth (≥45%) throughout the large-sized scaffold with substantial reduction in inflammation (≥40%), and an increase in the induction of angiogenesis (≥40%). This novel design, therefore, would be highly applicable for successful grafting to replace a damaged tissue in future.
New application of three-dimensional printing biomaterial in nasal reconstruction. - The Laryngoscope
Polycaprolactone (PCL) is an U.S. Food and Drug Administration-approved synthetic biodegradable polymer and is easily fabricated into three-dimensional (3D) structures. In this study, the 3D-printed PCL implant for nasal augmentation was further evaluated for its suitability for nasal surgeries such as septoplasty and rhinoplasty.Ten New Zealand White rabbits were included and divided into study and sham groups (7 and 3, respectively). A lateral incision was made on the nasal dorsum and a pocket formed in the subperichondrial plane between the upper lateral cartilage and nasal septum. Polycaprolactone was fabricated based on 3D printing technology into a 0.8 × 0.8-cm rectangular shape for use as a nasal implant. The material was inserted as a septal extension graft and sutured with alar cartilage for nasal reshaping. The implants were harvested 4, 8, and 12 weeks after implantation and evaluated by gross morphological assessment and histological examination.The initial shape of the implant was unchanged in all cases, and no definitive postoperative complications were seen over the 3-month period. Gross morphological evaluation confirmed that implants remained in their initial location without migration or extrusion. Histologic evaluations showed that the implant architectures were maintained with excellent fibrovascular ingrowth and minimal inflammatory reactions.Polycaprolactone can be used for nasal reconstruction such as nasal augmentation. Polycaprolactone is easy to work with and will avoid the increased operative time and morbidity associated with autograft harvesting. Therefore, PCL implants designed by 3D printing can serve as clinically biocompatible materials in craniofacial reconstruction in the future.NA. Laryngoscope, 2017.© 2017 The American Laryngological, Rhinological and Otological Society, Inc.
Endoscopic Endonasal Transsphenoidal Approach From the Otolaryngologist Point of View. - The Journal of craniofacial surgery
In February 2009, the authors' center formed a team of neurosurgeons, otolaryngologists, endocrinologists, and radiologists to perform pituitary surgery using the endoscopic endonasal transsphenoidal approach (EETSA). This paper reviews the authors' experience with the technique, pathological outcomes, hormone profiles, and postoperative complications.Between February 2009 and December 2015, 535 patients underwent the EETSA with 2-nostrils/4-hands surgery. All of the patients had preoperative neurophthalmological and endocrinological assessments and neuroimaging. Patients were followed for at least 6 months with otolaryngological evaluations.The most common pathology treated was pituitary adenomas, with 390 (72.9%) patients. Of these, 287 (73.6%) were nonfunctioning adenomas. As the surgical method, the conventional 2-nostrils/4-hands technique was performed in 77 patients (14.4%), a right conventional nasoseptal flap and left modified nasoseptal rescue flap technique was used in 135 patients (25.2%), and bilateral modified nasoseptal rescue flaps were used in 323 patients (60.4%). Postoperative complications occurred in 46 patients (8.6%). The most common complications were vascular injury or hematoma (10 patients, 1.9%), and the most common postoperative sinonasal complaints were hyposmia or anosmia. Olfactory function was significantly decreased according to the Connecticut Chemosensory Clinical Research Center test (P <0.001) and Cross-Cultural Smell Identification Test scores (P <0.001) evaluated 6 months postoperatively.Skull-base tumor surgery via an EETSA with a team approach was performed for various extended tumors. It is important to consider postoperative sinonasal dysfunction, such as hyposmia or anosmia, and to have this followed by an otolaryngologist.
Prognosis of Olfactory Dysfunction according to Etiology and Timing of Treatment. - Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery
Objective We evaluated the severity of olfactory impairment according to risk factors, compared responses with risk factors and treatment timing, and investigated prognosis according to treatments. Study design Case series with chart review. Setting Tertiary referral center. Subjects and Methods We retrospectively reviewed medical records of patients complaining of loss of their sense of smell between January 2006 and May 2016. In total, 491 patients were included. We evaluated olfactory function using the Connecticut Chemosensory Clinical Research Center test (threshold test) and Cross-cultural Smell Identification Test. Results Post-upper respiratory infection patients showed better results than those with other risk factors (59.6% recovered). Patients with head trauma (12.5% recovered) and congenital olfactory dysfunction (0% recovered) showed poorer results. Earlier treatment showed better olfactory recovery outcomes for post-upper respiratory infection ( P = .001), head trauma ( P = .022), and nasal/sinus surgery ( P = .009). Xerostomia ( P = .73) and idiopathy ( P = .365) showed no significant difference in terms of treatment timing. The threshold test better reflected subjective recovery than the identification test. The systemic + topical steroid group and the systemic steroid treatment group both showed better smell recovery outcomes than the group with topical treatment alone (both, P < .001). However, there was no significant difference between the systemic treatment group and the systemic + topical treatment group ( P = .978). Conclusions Our findings suggest that the duration of smell loss is important for better olfactory outcomes with most etiologies. Also, the effects of systemic steroids were better than those of topical steroids, regardless of combined treatment.
Does the Effect of Inferior Turbinate Outfracture Persist? - Plastic and reconstructive surgery
To resolve nasal obstruction in rhinoplasty, inferior turbinate outfracture is performed widely alone or combined with other procedures. There are conflicting reports on the effect of inferior turbinate outfracture. This study evaluated the persistence of morphologic changes after inferior turbinate outfracture.This retrospective study enrolled 55 patients who underwent inferior turbinate outfracture without septal surgery to approach the sphenoid sinus for brain tumor removal. Coronal paranasal sinus computed tomographic images obtained preoperatively and 6 months postoperatively were compared. The authors measured the shortest distance from the median line to the medial border of the conchal bone and the shortest distance from the medial border of the conchal bone to the lateral nasal line. The authors also gauged the projection angle of the conchal bone and constitutional thickness of the inferior turbinate.After inferior turbinate outfracture, the shortest distance from the median line to the medial border of the conchal bone increased, and shortest distance from the medial border of the conchal bone to the lateral nasal line decreased. The projection angle decreased significantly by 6 months postoperatively. After outfracture, the thickness of the medial mucosa had increased significantly, wheras the thickness of the conchal bone had decreased significantly (p < 0.05).The effect of inferior turbinate outfracture is preserved for at least 6 months. Moreover, compensatory hypertrophy of the medial mucosa develops in the inferior turbinate after outfracture. Therefore, outfracture with medial submucosal volume reduction would be recommended as the best procedure for treating inferior turbinate hypertrophy.Therapeutic, IV.
Intranasal azelastine and mometasone exhibit a synergistic effect on a murine model of allergic rhinitis. - American journal of otolaryngology
The purpose of this study was to compare the anti-allergic effects of the combination of azelastine and mometasone with those of either agent alone in a Dermatophagoides farinae (Derf)-induced murine model of allergic rhinitis (AR).Forty BALB/c mice were divided into five groups: azelastine (A), mometasone (M), a combination of azelastine and mometasone (MA), Derf, and control. Derf served as the allergen. Allergic symptom scores, eosinophil counts, and serum Derf-specific IgE levels were measured. The mucosal levels of mRNAs encoding interferon (IFN)-γ, T-bet, interleukin (IL)-4, GATA-3, Foxp3, IL-17, and ROR-γt were determined by real-time polymerase chain reaction. The T-bet, GATA-3, Foxp3, and ROR-γt results were confirmed by Western blotting.Nose-rubbing motions; the levels of mRNAs encoding IL-4, GATA-3, and ROR-γt; and tissue eosinophil count were reduced in the MA compared with those in the Derf group (all P values <0.05). The levels of mRNAs encoding GATA3 and IL-4 mRNA [synthesized by T helper (Th)2 cells] were reduced and that of mRNA encoding Foxp3 was increased in the MA compared with those in the Derf and A groups. Western blotting confirmed these findings.We found that the combination of intranasal azelastine and mometasone synergistically suppressed Th17 responses and (reciprocally) elevated Treg responses. Therefore, this combination not only ameliorated allergic inflammation by suppressing Th2 responses, but also usefully modified the Treg/Th17 balance.Copyright © 2017 Elsevier Inc. All rights reserved.
Risk Factors Predicting Nasoseptal Flap Failure in the Endoscopic Endonasal Transsphenoidal Approach. - The Journal of craniofacial surgery
Reconstruction of the skull base using a pedicled nasoseptal flap (NSF) seems to be advantageous after the endoscopic endonasal transsphenoidal approach (EETSA). A few reports have evaluated the cause of flap failure in EETSA using NSFs. The aim of this study was to evaluate the perioperative risk factors for NSF failure.Patient series.Retrospective review of medical records at a tertiary referral center.The study population comprised patients who underwent EETSA with NSF elevation between February 2009 and March 2014. The authors retrospectively reviewed the all patients' medical records, including operative findings.Four hundred thirteen patients (203 males and 210 females) underwent EETSA, and 315 patients underwent EETSA with NSF elevation. The mean patient age was 48.0 years. The total number of patients of NSF failure was 6 (overall rate: 1.61%, 6/315; flap elevation: 0.31%, 1/315; flap reconstruction: 15.1%, 5/33). Two patients had diabetes mellitus. One patient had cardiovascular problems. Five patients were elderly (>60 years; mean age: 70 years). Five patients had postoperative nasal infection. One patient underwent preoperative radiation therapy.Nasoseptal flap is a usually safe and effective technique for skull base reconstruction. However, the management of patients with diabetes mellitus, cardiovascular problems, advanced age, postoperative nasal infection, and radiation therapy may require more attention to improve NSF survival.
Prognostic significance of centromere 17 copy number gain in breast cancer depends on breast cancer subtype. - Human pathology
Increased copy number of chromosome enumeration probe (CEP) targeting centromere 17 is frequently encountered during HER2 in situ hybridization (ISH) in breast cancer. The aim of this study was to clarify the clinicopathologic significance of CEP17 copy number gain in a relatively large series of breast cancer patients. We analyzed 945 cases of invasive breast cancers whose HER2 fluorescence ISH reports were available from 2004 to 2011 at a single institution and evaluated the association of CEP17 copy number gain with clinicopathologic features of tumors and patient survival. We detected 186 (19.7%) cases of CEP17 copy number gain (CEP17≥3.0) among 945 invasive breast cancers. In survival analysis, CEP17 copy number gain was not associated with disease-free survival of the patients in the whole group. Nonetheless, it was found to be an independent adverse prognostic factor in HER2-negative group, but not in HER2-positive group. In further subgroup analyses, CEP17 copy number gain was revealed as an independent poor prognostic factor in HER2-negative and hormone receptor-positive breast cancers, and it was associated with aggressive histologic variables including high T stage, high histologic grade, lymphovascular invasion, P53 overexpression, and high Ki-67 proliferative index. In conclusion, we found that elevated CEP17 count can serve as a prognostic marker in luminal/HER2-negative subtype of invasive breast cancer. We advocate the use of the dual-colored FISH using CEP17 rather than the single-colored one since it gives additional valuable information on CEP17 copy number alterations.Copyright © 2016. Published by Elsevier Inc.
High non-relapse mortality and low relapse incidence in gender-mismatched allogeneic hematopoietic stem cell transplantation from a parous female donor with a male child. - Leukemia & lymphoma
To clarify the influence of exposure to a male fetus during a female donor's (FD) pregnancy in allogeneic hematopoietic stem cell transplantation (HSCT), we retrospectively examined 292 HSCT patients. The 5-year non-relapse mortality (NRM) was 33.5% among 31 male recipients who had HSCT from FD with a male child (MC), 23.0% among 40 male recipients who had HSCT from FD without MC and 19.6% among 221 other recipients. The 5-year relapse incidence (RI) was 22.6%, 42.0%, and 43.1% for the respective group. In multivariate analysis, male recipients who had HSCT from FD with MC had an increased risk of NRM (hazard ratio [HR] 1.92, 95% CI 1.08-3.42, p = .03), a reduced risk of RI (HR 0.42, 95% CI 0.18-0.96, p = .04), resulting in no significant difference regarding overall survival. Male child of FD is suggested to influence NRM and RI in gender-mismatched HSCT.

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