Publications by authors named "Sang Khwarg"

A 40-year-old woman visited our clinic for recurred pterygium and symblepharon in the right eye. She had a history of pterygium excision 8 years before. Over the course of 7 years, we performed pterygium excision combined initially with mitomycin C (MMC) application and conjunctival autograft.

View Article and Find Full Text PDF
Article Synopsis
  • * Conducted on 39 SC patients, it found that various nuclear receptors were present in tumor cells, with glucocorticoid receptors the most common, while specific glucose transporters showed high expression, indicating potential targets for therapy.
  • * Key findings suggest that hormonal and metabolic factors influence SC progression, identifying low androgen receptor levels and high monocarboxylate transporter 1 expression as indicators of poor survival outcomes, highlighting their potential as therapeutic targets.
View Article and Find Full Text PDF
Article Synopsis
  • A study was conducted to examine the presence of human papillomavirus (HPV) in eyelid sebaceous gland carcinoma (SGC) and squamous cell carcinoma (SCC) among Koreans, assessing its correlation with clinicopathological characteristics.
  • The researchers analyzed surgically resected eyelid samples from 1999 to 2011, employing various diagnostic methods including immunohistochemistry and DNA analysis.
  • HPV was detected in a small number of cases (4 SGC and 6 SCC), with a significant association found between HPV positivity and SCC of tarsal conjunctival origin; however, p16 IHC overexpression was not a reliable indicator of HPV infection in SGC.
View Article and Find Full Text PDF

Artificial intelligence as a screening tool for eyelid lesions will be helpful for early diagnosis of eyelid malignancies and proper decision-making. This study aimed to evaluate the performance of a deep learning model in differentiating eyelid lesions using clinical eyelid photographs in comparison with human ophthalmologists. We included 4954 photographs from 928 patients in this retrospective cross-sectional study.

View Article and Find Full Text PDF

The aim of this study is to characterize the microRNA (miRNA) expression signatures in patients with thyroid eye disease (TED) and identify miRNA biomarkers of disease activity. Total RNA was isolated from the sera of patients with TED (n = 10) and healthy controls (HCs, n = 5) using the miRNeasy Serum/Plasma Kit. The NanoString assay was used for the comprehensive analysis of 798 miRNA expression profiles.

View Article and Find Full Text PDF

Primary enucleation is a life-saving treatment for advanced intraocular retinoblastoma, particularly in patients with poor visual potential and functional contralateral eyes. This single-center study presents the treatment outcomes of patients with unilateral retinoblastoma who received primary enucleation and adjuvant chemotherapy with cyclophosphamide, vincristine, doxorubicin, and intrathecal methotrexate (CVDM) between 2000 and 2020. Twenty patients were enrolled in the study.

View Article and Find Full Text PDF

Objectives: To analyse the ophthalmic manifestations and treatment outcomes of Korean patients with granulomatosis with polyangiitis (GPA).

Methods: One hundred twenty patients diagnosed with GPA by rheumatologists from January 1984 to March 2019 at three referral centres were retrospectively reviewed. Patients with ophthalmic symptoms were examined by ophthalmologists and underwent orbital imaging.

View Article and Find Full Text PDF

Purpose: To quantitatively analyze morphological and functional alterations of the meibomian glands in eyes with marginal entropion and their changes after surgery.

Methods: Sixty eyes of 52 patients with marginal entropion and underwent meibography and interferometer were included. One-hundred and seventeen age- and sex-matched eyes with minimal to mild meibomian gland dysfunction (MGD) were recruited as control eyes.

View Article and Find Full Text PDF

Purpose: To investigate the association between the bony nasolacrimal duct (NLD) size and outcomes of nasolacrimal silicone intubation for incomplete primary acquired nasolacrimal duct obstruction (PANDO).

Methods: Patients who underwent silicone intubation for incomplete PANDO and had undergone facial computed tomography (CT) were included. Surgical success was judged by both epiphora improvement and normalized tear meniscus height (TMH; < 300 μm) on anterior segment optical coherence tomography at 3 months after tube removal.

View Article and Find Full Text PDF

Purpose: To evaluate the effects of the concomitant use of spacer grafts in lateral tarsal strip surgery in patients with facial nerve palsy-related lower-eyelid retraction.

Methods: Patients who underwent lateral tarsal strip surgery to correct facial nerve palsy-related lower-eyelid retraction were retrospectively reviewed. Postoperative decreases in marginal reflex distance-2 values at 1, 2 and 6 months were measured along with the effects of spacer grafts.

View Article and Find Full Text PDF

Purpose: To evaluate the eye position in subjects with intermittent exotropia and normal subjects under general anesthesia (GA) using the strabismus photo analyzer.

Methods: This retrospective case-control study included 78 subjects with intermittent exotropia and 25 normal control subjects who underwent epiblepharon surgery. Eye position under GA was assessed using the strabismus photo analyzer, based on eye models generated from corneal lights and limbus in pre- and post-anesthesia images.

View Article and Find Full Text PDF

Purpose: To evaluate the various surgical modalities of congenital lacrimal fistula and assess the mutual effect of lacrimal fistula and lacrimal drainage abnormality on the individual surgical outcomes.

Methods: In this retrospective cohort and case-control study, 74 eyes from 63 patients with lacrimal fistula who underwent surgical management between 2000 and 2015 at three medical centers were enrolled. The data collected included sex, age, preoperative symptoms, presence of concurrent lacrimal drainage abnormality, surgical methods, and surgical outcomes.

View Article and Find Full Text PDF

Background/aims: To report the long-term outcomes of enucleation and insertion of porous polyethylene (PP) orbital implant according to the evolving surgical techniques and implant in patients with paediatric retinoblastoma .

Methods: Patients with paediatric retinoblastoma who underwent enucleation and PP implant insertion from December 1998 to December 2014 were retrospectively reviewed and divided into four groups: group A, classic enucleation +PP implant; group B, enucleation +PP implant +anterior closure of the posterior Tenon's (ACPT) capsule; group C, enucleation +PP implant +free orbital fat graft +ACPT and group D, enucleation +smooth surface tunnel PP implant +ACPT. Survival analysis of implant exposure and eyelid malpositions was performed.

View Article and Find Full Text PDF

: To investigate the characteristics of margin reflex distance 1 (MRD1) asymmetry in congenital lower eyelid epiblepharon and its resolution after surgical correction of epiblepharon.: Among patients who underwent lower eyelid epiblepharon surgery from November 2015 to September 2017, patients with a preoperative MRD1 difference of more than 1.0 mm between the two eyes according to medical photographs were defined as having MRD1 asymmetry.

View Article and Find Full Text PDF

Purpose: To search for novel geometric parameters for corneal limbal dermoids that enable the prediction of clinical and surgical outcomes.

Methods: We reviewed the medical records and anterior segment photographs of 85 eyes of 85 patients with corneal limbal dermoids that had been surgically excised. Patients were assigned to the following 4 cohorts (multiple assignments allowed): postoperative visual acuity (cohort 1, n = 65), amblyopia (cohort 2, n = 67), postoperative scar formation (cohort 3, n = 51), and preoperative spontaneous progression of dermoids (cohort 4, n = 39).

View Article and Find Full Text PDF

Aim: To report CT and MR imaging findings of ocular adnexal mucosa-associated lymphoid tissue lymphoma associated with IgG4-related disease (IgG4-MALT lymphoma), a rare but clinically important complication of ocular adnexal IgG4-related disease.

Methods: We retrospectively reviewed all cases of histologically confirmed ocular adnexal IgG4-related disease at three tertiary and one secondary referral centers, between February 2003 and December 2016. Seven cases of histopathologically diagnosed IgG4-MALT lymphoma were identified.

View Article and Find Full Text PDF

Non-specific orbital inflammation (NSOI) is a noninfectious inflammatory condition of the orbit. Although it is generally considered the most common diagnosis derived from an orbital biopsy, it is a diagnosis of exclusion, meaning that the diagnosis requires exclusion of a systemic process or another identifiable etiology of orbital inflammation. The clinical diagnosis of NSOI is ill-defined, but it is typically characterized by acute orbital signs and symptoms, including pain, proptosis, periorbital edema, chemosis, diplopia, and less commonly visual disturbance.

View Article and Find Full Text PDF

To evaluate histopathological characteristics of conjunctival pigmented lesions and analyze clinical features related to histologic classification in Asian population, we analyzed medical records, anterior segment photographs, and histological specimen of 85 eyes who had undergone biopsy for pigmented conjunctival lesions at Seoul National University Hospital between 1999 and 2018. Compound nevus was the most common type of conjunctival pigmented lesions (67.1%), followed by conjunctival melanocytic intraepithelial neoplasia (primary acquired melanosis)(11.

View Article and Find Full Text PDF

Purpose: To evaluate long-term outcomes of maintenance of lacrimal silicone stent for the management of functional epiphora after anatomically patent external dacryocystorhinostomy (DCR).

Methods: We retrospectively reviewed the medical records of 101 eyes of 75 patients who were diagnosed to have functional epiphora after external DCR from 2005 to 2014. Functional epiphora was defined as epiphora that persisted or recurred even after patent DCR confirmed by a lacrimal irrigation test.

View Article and Find Full Text PDF

Objective: To investigate the clinical outcomes of initial conservative management in infants with congenital dacryocystocele.

Design: Retrospective case series.

Participants: A total of 30 congenital dacryocystoceles of 28 Korean infants treated between January 2006 and December 2015.

View Article and Find Full Text PDF