1.Comparison of Anterior Capsule Stability Following Implantation of Three Single Piece Acrylic Intraocular Lenses with Different Haptic Design.
Soonwon YANG ; Sung A LIM ; Kyung Sun NA ; Choun Ki JOO
Korean Journal of Ophthalmology 2017;31(1):32-38
PURPOSE: To compare the anterior capsule contraction and intraocular lens (IOL) decentration among three types of IOL to determine the influence of haptic design on anterior capsule stability. METHODS: One hundred fifty patients were enrolled in this prospective, randomized study and 260 eyes underwent implantation of one of the following IOLs: modified L-haptic IOL (n = 74), modified C-haptic IOL (n = 97), or a plate-haptic IOL (n = 89). The area of the anterior capsule opening, IOL decentration, and capsule overlap were measured using retroillumination photospot 1 day and 2 months after cataract surgery. RESULTS: The area of capsule opening at postoperative day 1 was significantly different between the three IOLs (p < 0.01). All IOLs showed reduction of the anterior capsule opening from 1 day to 2 months after surgery, and greater reduction was shown in the modified C-haptic IOL (p < 0.001). At postoperative month 2, IOL decentration was significantly different between the IOLs and showed a positive correlation with the mean area reduction during month 2. CONCLUSIONS: The degree of anterior capsule contraction and IOL decentration in modified L-haptic IOLs were less than those in modified C-haptic IOLs and comparable to those in plate-haptic IOLs.
Cataract
;
Humans
;
Lenses, Intraocular*
;
Prospective Studies
2.Changes in Ocular Surface after Hematopoietic Stem Cell Transplantation.
Soonwon YANG ; Hyun Seung KIM ; Kyung Sun NA
Journal of the Korean Ophthalmological Society 2016;57(11):1706-1713
PURPOSE: To evaluate the prevalence of dry eye in patients before allogeneic hematopoietic stem cell transplantation (aHSCT) and changes in ocular surface in the acute stage after aHSCT. METHODS: We evaluated 56 eyes of 28 patients after aHSCT at a tertiary hospital. All patients underwent a full ophthalmic examination at 1 month before aHSCT (baseline) and 1, 2 and 3 months after aHSCT and answered the ocular surface disease index (OSDI) questionnaire to assess ocular involvement in the form of dry eye syndrome or any other ocular manifestation at each visit. Subjects were divided into 2 groups depending on the presence of dry eye at baseline. The main outcome measures were best-corrected visual acuity, tear break-up time, corneal fluorescein staining, Schirmer test, tear osmolarity and OSDI questionnaire. RESULTS: Dry eye was already present in 40 eyes of 20 patients (71.4%) suffering from hematological disease before aHSCT. Tear osmolarity was significantly increased at 1, 2 and 3 months after aHSCT compared with baseline in the dry eye group (each p < 0.01). Tear osmolarity also increased at 2 months after aHSCT and tear break-up time decreased at 3 months after aHSCT, which were statistically significant (p = 0.01 and p = 0.02, respectively). Other changes in ocular surface indices were not statistically significant. CONCLUSIONS: In the acute stage, changes in ocular surface indices such as Schirmer test and OSDI were not statistically significant. However, significant changes in tear osmolarity in both groups indicate that ophthalmic examination 1 or 2 months after aHSCT is recommended. Additionally, aggressive treatment is warranted when patients have dry eyes at baseline.
Dry Eye Syndromes
;
Fluorescein
;
Graft vs Host Disease
;
Hematologic Diseases
;
Hematopoietic Stem Cell Transplantation*
;
Hematopoietic Stem Cells*
;
Humans
;
Osmolar Concentration
;
Outcome Assessment (Health Care)
;
Prevalence
;
Tears
;
Tertiary Care Centers
;
Visual Acuity
3.Macrofollicular Variant of Papillary Thyroid Carcinoma with Extensive Hemorrhage.
Haeryoung KIM ; SoonWon HONG ; Kwang Gil LEE ; Eun Kyung KIM ; Cheong Soo PARK ; Woung Youn CHUNG ; Woo Ick YANG
Korean Journal of Cytopathology 2004;15(1):60-64
BACKGROUND: The macrofollicular variant of papillary thyroid carcinoma (MVPC) is characterized by macrofollicles occupying more than half of the tumor and demonstrating nuclear features of classic papillary carcinoma. It is difficult to recognize on fine needle aspiration (FNA) cytology due to the paucity of aspirated neoplastic cell clusters, especially when the tumor is associated with extensive areas of hemorrhage. CASE: A 34-year-old female presented with a well-demarcated nodule in the thyroid gland, diagnosed as a benign nodule on ultrasonography and computed tomography. FNA cytology smear revealed a few small aggregates of follicular cells with morphological features suspicious for papillary carcinoma, set in a background of hemorrhage, inflammatory cells, and hemosiderin-laden macrophages. Intraoperative frozen section revealed macrofollicular nests filled with hemorrhage and composed of follicular cells demonstrating nuclear clearing and grooves. CONCLUSION: MVPC is a rare but distinctive variant of papillary carcinoma, which is easily mistaken for adenomatous goiter or benign macrofollicular neoplasm on radiologic findings. The cytopathologist should alert oneself on encountering benign radiologic findings and any smear composed of scant numbers of follicular cells with nuclear features suspicious for papillary carcinoma despite the bland-looking background of hemorrhage and hemosiderin-laden macrophages, and recommend intraoperative frozen sections for a definite diagnosis.
Adult
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Biopsy, Fine-Needle
;
Carcinoma, Papillary
;
Diagnosis
;
Female
;
Frozen Sections
;
Goiter
;
Hemorrhage*
;
Humans
;
Macrophages
;
Thyroid Gland*
;
Thyroid Neoplasms*
;
Ultrasonography
4.Correlation and Accuracy Between Fine Needle Aspiration Cytology of Thyroid Lesions and Histopathologic Diagnosis: Analysis of 322 Histopathologically Confirmed Cases.
Jaseung KOO ; Woo Hee JUNG ; Seokwoo YANG ; SoonWon HONG
Korean Journal of Cytopathology 2008;19(2):144-151
Fine needle aspiration (FNA) cytology is the decisive test in the preoperative diagnostics of thyroid nodules. Here we share our institutional experience about thyroid aspiration and give suggestions for suspicious cytology results. Three hundred twenty-two cases in 270 patients (mean age 47.4 years, 243 women and 27 men) who underwent thyroidectomy were reviewed. Among the 322 cases, the FNA diagnosis of "positive for malignancy" was 87 cases (27.0%), "suggestive of malignancy" 30 cases (9.3%), "suspicious for malignancy" 61 cases (18.9%), "negative for malignancy" 102 cases (31.7%), and "unsatisfactory smear" 42 cases (13.0%). Eighty seven cases (100%) out of "positive for malignancy", 29 cases (96.7%) out of "suggestive of malignancy", and 39 cases (64.0%) out of "suspicious for malignancy" were papillary carcinoma (148 cases, 95.5%), or follicular carcinoma (2 cases, 1.3%), or metastatic carcinoma (1 case, 0.6%). Seventeen patients who had only negative or unsatisfactory cytology underwent thyroidectomy and nine cases (52.9%) were papillary carcinoma. We suggest that: the cytology diagnosis of "suggestive of malignancy" could be regarded as "positive for malignancy", the cytology diagnosis of "suspicious of malignancy" should be carefully correlated with clinico-radiologic manifestation, and even a negative or unsatisfactory smear should be carefully followed up.
Biopsy, Fine-Needle
;
Carcinoma, Papillary
;
Female
;
Humans
;
Thyroid Gland
;
Thyroid Nodule
;
Thyroidectomy
5.Comparisons for Evaluation of Efficacy and Safety of Cyclosporin A 0.05% Ophthalmic Emulsion Treatment Groups.
Soonwon YANG ; Yong Soo BYUN ; Chang Rae RHO ; Su Young KIM ; Yang Kyung CHO ; Eun Chul KIM ; Sung Kun CHUNG ; Choun Ki JOO
Journal of the Korean Ophthalmological Society 2016;57(12):1849-1856
PURPOSE: To evaluate and compare the efficacy and safety of cyclosporine 0.05% (Cyporin N eye drops 0.05%) to an active comparator (Restasis®) in moderate to severe dry eye patients. METHODS: This is a multicenter, randomized, double-blind, parallel, active control, non-inferiority, phase III study. Patients had a 2-week run-in period (during the run-in period, patients used artificial tears, if applicable), and afterward 158 patients were randomly assigned treatment for 12 weeks with cyclosporine 0.05% (with artificial tears, if applicable), in which the efficacy and safety were evaluated every four weeks. RESULTS: Corneal staining tests showed that in the per protocol set group, the study group was not inferior to the control group; the results for the full analysis set analytic group were the same. The number of adverse events reported from the 158 patients was not significantly different between groups (p = 0.1107). Additionally, other evaluations, including tolerability evaluations, clinical pathology examinations, and vital signs, show that there is no difference in terms of safety between the groups. CONCLUSIONS: Cyclosporine A 0.05% (Cyporin N eye drops 0.05%) is considered to have the same efficacy and safety compared to the active comparator.
Cyclosporine*
;
Dry Eye Syndromes
;
Humans
;
Lubricant Eye Drops
;
Ophthalmic Solutions
;
Pathology, Clinical
;
Vital Signs
6.Extremely Well-Differentiated Papillary Thyroid Carcinoma Resembling Adenomatous Hyperplasia Can Metastasize to the Skull: A Case Report.
Ju Yeon PYO ; Jisup KIM ; Sung Eun CHOI ; Eunah SHIN ; Seok Woo YANG ; Cheong Soo PARK ; Seok Mo KIM ; SoonWon HONG
Yonsei Medical Journal 2017;58(1):255-258
We describe herein histologic, immunohistochemical, and molecular findings and clinical manifestations of a rare case of an extremely well differentiated papillary thyroid carcinoma (EWD-PTC). Similarly, it is also difficult to diagnose follicular variant papillary thyroid carcinoma (FVPTC), whose diagnosis is still met with controversy. A recently reported entity of well-differentiated tumor of uncertain malignant potential (WDT-UMP) is added to the diagnostic spectrum harboring EWD-PTC and FVPTC. We report this case, because EWD-PTC is different from FVPTC in its papillary architecture, and also from WDT-UMP in its recurrence and metastatic pattern. These morphologically deceptive entities harbored diagnostic difficulties in the past because the diagnosis depended solely on histology. However, they are now diagnosed with more certainty by virtue of immunohistochemical and molecular studies. We experienced a case of EWD-PTC, which had been diagnosed as adenomatous hyperplasia 20 years ago and manifested recurrence with lymph node (LN) metastasis 7 years later. After another 7 years of follow-up, a new thyroid lesion had developed, diagnosed as FVPTC, with LN metastasis of EWD-PTC. One year later, the patient developed metastatic FVPTC in the skull. Immunohistochemically, the EWD-PTC was focally positive for CK19, negative for galectin-3, and focally negative for CD56. Molecular studies revealed BRAF-positivity and K-RAS negativity. The FVPTC in the left thyroid showed both BRAF and K-RAS negativity. In conclusion, EWD-PTC and FVPTC share similar histologic features, but they are different tumors with different molecular biologic and clinical manifestations. A large cohort of EWD-PTC should be included in further study.
Adenocarcinoma, Follicular/pathology/secondary
;
Adult
;
Carcinoma, Papillary, Follicular/pathology/*secondary
;
Female
;
Galectin 3/analysis
;
Humans
;
Hyperplasia/pathology
;
Lymphatic Metastasis
;
Male
;
Middle Aged
;
Neoplasm Recurrence, Local/pathology
;
Skull Neoplasms/*secondary
;
Thyroid Neoplasms/*pathology
7.Comparison of Penetrating Keratoplasty and Descemet Stripping Automated Endothelial Keratoplasty in Eyes with Glaucoma Ahmed Valve implants
Yeonwoo CHO ; SoonWon YANG ; Doh Hoon CHUNG ; Seon Joo KIM ; You-Sook HWANG ; Choun-Ki JOO ; Yong-Soo BYUN ; So-Hyang CHUNG ; Hyun-Seung KIM
Journal of the Korean Ophthalmological Society 2022;63(3):242-250
Purpose:
To compare the clinical outcomes of penetrating keratoplasty (PKP) and Descemet stripping automated endothelial keratoplasty (DSAEK) in eyes with Glaucoma Ahmed Valve implants.
Methods:
The charts of 11 patients who underwent PKP and 11 who underwent DSAEK between February 2016 and June 2018 were retrospectively reviewed; all patients previously underwent Ahmed valve implant surgery. The best corrected visual acuity, intraocular pressure, and endothelial cell count were compared 1, 3, and 6 months after surgery. Graft rejection and graft failure were also evaluated during follow-up. The survival rates were compared using Kaplan–Meier survival analysis.
Results:
The difference in graft survival rates of the PKP and DSAEK groups was not significant (p = 0.295); however, graft failure occurred earlier in the PKP group (12.9 ± 10.1 vs. 18.8 ± 5.3 months). The postoperative best corrected visual acuity of the PKP group had improved at 1 (p = 0.027) and 3 (p = 0.017) months, while the DSAEK group showed significant improvement at 1, 3, and 6 months (all p = 0.005). Intergroup analysis showed better visual prognosis of the DSAEK group at 1, 3, and 6 months after surgery (p = 0.023, p = 0.007, and p = 0.004, respectively).
Conclusions
In our study, the two corneal transplantation methods did not have significantly different graft survival rates; however, graft failure occured later in the DSAEK group and the postoperative visual acuity was better than in the PKP group. Although further study is needed, performing DSAEK in patients with an Ahmed valve implant seems to be a good alternative to PKP.
8.In Vivo Human Lacrimal Gland Imaging Using an Ultrasound Biomicroscopy
Chanjoon PARK ; Da Ran KIM ; Young Chae YOON ; Soonwon YANG ; Woong-Joo WHANG ; Yong-Soo BYUN ; Hyung Bin HWANG ; Kyung Sun NA ; Hyun Soo LEE ; So Hyang CHUNG ; Eun Chul KIM ; Yang Kyung CHO ; Hyun Seung KIM ; Hosik HWANG
Korean Journal of Ophthalmology 2024;38(3):227-235
Purpose:
In the present study, we introduce human lacrimal gland imaging using an ultrasound biomicroscopy (UBM) with a soft cover and show their findings
Methods:
The representative UBM findings of palpebral lobes in seven subjects (four with non-Sjögren dry eye syndrome, one with Sjögren syndrome, and two healthy subjects) were described in this study. To prolapse the palpebral lobe, the examiner pulled the temporal part of the upper eyelid in the superotemporal direction and directed the subject to look in the inferonasal direction. We scanned the palpebral lobes longitudinally and transversely using UBM. We used an Aviso UBM with a 50 MHz linear probe and ClearScan.
Results:
In UBM of two healthy subjects, the echogenicity of the lacrimal gland was lower than that of the sclera and homogeneous. But the parenchyma of a patient with Sjögren dry eye syndrome was quite inhomogeneous compared to the healthy subjects. In two patients with dry eye syndrome, we were able to observe some lobules in the parenchyma. We could find excretory ducts running parallel at the surface of the longitudinal section in some subjects. In the longitudinal UBM scan of a subject, we observed a tubular structure at a depth of 1,500 μm that was considered a blood vessel. It ran from the superonasal to the inferotemporal direction. In a subject, we observed a large cyst beneath the conjunctiva.
Conclusions
Lacrimal gland imaging using UBM has both advantages of optical coherence tomography and sonography, and could be useful for evaluating dry eye syndrome.
9.Categorization of Meibomian Gland Dysfunction Using Lipid Layer Thickness and Meibomian Gland Dropout in Dry Eye Patients: A Retrospective Study
Phil Kyu LEE ; Jae Lim CHUNG ; Da Ran KIM ; Young Chae YOON ; SoonWon YANG ; Woong-Joo WHANG ; Yong-Soo BYUN ; HyungBin HWANG ; Kyung Sun NA ; HyunSoo LEE ; So Hyang CHUNG ; Eun Chul KIM ; YangKyung CHO ; Hyun Seung KIM ; Ho Sik HWANG
Korean Journal of Ophthalmology 2024;38(1):64-70
Purpose:
In the present study, we determined the prevalence of obstructive meibomian gland dysfunction (MGD), hyposecretory MGD, grossly normal MG, and hypersecretory MGD in patients with dry eye syndrome using lipid layer thickness (LLT) and MG dropout.
Methods:
Eighty-eight patients with dry eye syndrome were included in the study. Patients were categorized into four groups according to the LLT and weighted total meiboscore. The proportion of patients in each group was calculated. The age, sex, Ocular Surface Disease Index, LLT, Schirmer, tear film breakup time, cornea stain, weighted total meiboscore, expressibility, and quality of meibum were compared between the four groups.
Results:
Fifteen eyes (17.0%) had obstructive MGD, two eyes (2.3%) had hyposecretory MGD, 40 eyes (45.5%) had grossly normal MG, and 17 eyes (19.3%) had hypersecretory MGD. The obstructive MGD group was younger than the grossly normal MG group. In obstructive MGD, the ratio of men to women was higher than that of the other groups. However, Ocular Surface Disease Index, Schirmer, tear film breakup time, and corneal stain did not show statistically significant differences between the four groups. The meibum expressibility of the hyposecretoy MGD group was worse than those of the other groups. The meibum expressibility of the hyposecretoy MGD group was poor than those of the obstructive and hypersecretory MGD group.
Conclusions
This categorization was expected to help determine the best treatment method for dry eye syndrome, according to the MG status.