1.A Practical Immunohistochemistry-Based Model for Predicting Pathologic Complete Response in Estrogen Receptor-Strong Positive and HER2-Negative Breast Cancer
Su Min LEE ; Jeong Eon LEE ; Seok Jin NAM ; Seok Won KIM ; Jonghan YU ; Byung Joo CHAE ; Se Kyung LEE ; Jai Min RYU ; Eun Yoon CHO ; Hyunwoo LEE ; Woong Ki PARK
Journal of Breast Cancer 2026;29(2):128-140
Purpose:
While the benefit of neoadjuvant chemotherapy (NAC) has been established in human epidermal growth factor receptor 2 (HER2)-positive and triple-negative breast cancers, its effectiveness in achieving pathological complete response (pCR) and optimal patient selection in estrogen receptor (ER)-positive, HER2-negative breast cancers remain less clearly defined. This study aimed to identify immunohistochemistry (IHC)-based predictors of pCR and to develop a scoring model for ER-strong positive/HER2-negative breast cancer.
Methods:
Data from a prospective cohort were retrospectively analyzed. We included 522 patients with ER-strong positive/HER2-negative tumors who received NAC and surgery between 2008 and 2021. IHC markers including progesterone receptor (PR), Ki-67, epidermal growth factor receptor (EGFR), cytokeratin 5/6 (CK5/6), and p53 were evaluated to identify predictors of pCR. Independent predictors of pCR from multivariate logistic regression were used to develop a weighted 4-point model. Model performance was assessed using receiver operating characteristic analysis. The prognostic impact of pCR was evaluated using KaplanMeier and Cox regression analyses.
Results:
Independent predictors of pCR included PR-negative status, positivity for basallike markers (EGFR or CK5/6), and Ki-67 ≥ 50%. The scoring model demonstrated good discrimination for pCR (area under the curve = 0.754). pCR rates increased stepwise, with scores of 4.9% (low), 10.7% (intermediate), and 36.2% (high). In the high-score group, pCR was significantly associated with improved disease-free survival (hazard ratio [HR], 0.09; p = 0.023) and distant metastasis-free survival (HR, 0.11; p = 0.035), whereas no significant survival differences according to pCR status were observed in the low and intermediate score groups.
Conclusion
This IHC-based model predicts pCR and helps identify subgroups in which pCR is associated with meaningful survival benefit following NAC in ER-positive/HER2-negative breast cancers. High-scoring patients may benefit from NAC, while patients with low- or intermediatescores may be better managed with surgery and endocrine therapy. This model may support personalized treatment decisions regarding NAC.
2.Clinical Outcomes of Lobular Carcinoma In Situ: Risk of Invasive Cancer Development
Doyoun WOEN ; Ki Jo KIM ; Su Min LEE ; Seungah LEE ; Kawon OH ; Cho Eun LEE ; Seok Jin NAM ; Seok Won KIM ; Jeong Eon LEE ; Byung Joo CHAE ; Se Kyung LEE ; Jai Min RYU ; Woong Ki PARK ; Hyunwoo LEE ; Jonghan YU
Journal of Breast Cancer 2026;29(2):163-174
Purpose:
Lobular carcinoma In Situ (LCIS) is a noninvasive lesion associated with an increased risk of invasive cancer. Since its removal from the tumor, node, metastasis classification in the 8th edition of the American Joint Committee on Cancer (AJCC) guidelines, the clinical management of LCIS has shifted from surgery to surveillance. However, studies focusing on the risk and associated factors for invasive cancer development in pure LCIS without ductal carcinoma In Situ (DCIS) or invasive cancer remain limited.
Methods:
We retrospectively analyzed 106 patients diagnosed with pure LCIS between 2008 and 2018. This study evaluated the effect of tamoxifen use and histologic type on the development of invasive cancer.
Results:
All 106 patients underwent surgery, and nine (8.5%) developed invasive cancer over a median follow-up of 67.5 months. The incidence of invasive cancer was lower in the tamoxifen group (6.3%, n = 4) than in the non-tamoxifen group (11.9%, n = 5), although this difference was not statistically significant (p = 0.266). Pleomorphic LCIS had a significantly higher incidence of invasive cancer (30.0%, n = 3) than classic LCIS (6.3%, n = 6) (p = 0.045).Multivariable Cox regression analysis showed no significant difference in the risk of invasive cancer according to tamoxifen use (hazard ratio [HR], 2.031; 95% confidence interval [CI], 0.544–7.579; p = 0.292). However, pleomorphic LCIS showed a trend toward an increased risk of invasive cancer compared to classic LCIS (HR, 3.856; 95% CI, 0.922–16.126; p = 0.064).
Conclusion
Postoperative tamoxifen did not significantly lower invasive cancer development in patients with pure LCIS. Pleomorphic LCIS may carry a higher risk than classic LCIS. These findings require tailored follow-up and treatment strategies based on the histologic subtype of LCIS.
3.Clinical Efficacy of Intense Pulsed Light Therapy in Treating Meibomian Gland Dysfunction among Glaucoma Patients
Kwang Eon HAN ; Sang Woo MOON ; Su Jin KIM ; Ji Eun LEE
Journal of the Korean Ophthalmological Society 2025;66(5):215-223
Purpose:
To evaluate the clinical efficacy of intense pulsed light (IPL) therapy combined with meibomian gland expression (MGX) in treating meibomian gland dysfunction (MGD) caused by glaucoma eye drops.
Methods:
This study included 20 patients (aged 18-85 years) who were using glaucoma eye drops and exhibited signs of MGD. Participants underwent four sessions of IPL therapy at 3-week intervals, each followed by MGX. Evaluative measures included the Ocular Surface Disease Index (OSDI), best-corrected visual acuity, Schirmer's test, tear break-up time (TBUT), corneal fluorescein staining score (CFS), lid margin abnormalities, meibomian gland expressibility (MGE), meibum quality, lipid layer thickness (LLT), and meiboscore. These assessments were conducted before and after each treatment.
Results:
After treatment, significant improvements were observed across all measured parameters, including OSDI, Schirmer's test, TBUT, CFS, lid margin abnormalities, MGE, meibum quality, LLT, and meiboscore.
Conclusions
IPL therapy combined with MGX was effective in improving ocular surface and eyelid abnormalities among patients with MGD induced by glaucoma eye drops. Our findings support the use of IPL and MGX as safe and effective adjunct therapies for these patients.
4.Clinical Efficacy of Intense Pulsed Light Therapy in Treating Meibomian Gland Dysfunction among Glaucoma Patients
Kwang Eon HAN ; Sang Woo MOON ; Su Jin KIM ; Ji Eun LEE
Journal of the Korean Ophthalmological Society 2025;66(5):215-223
Purpose:
To evaluate the clinical efficacy of intense pulsed light (IPL) therapy combined with meibomian gland expression (MGX) in treating meibomian gland dysfunction (MGD) caused by glaucoma eye drops.
Methods:
This study included 20 patients (aged 18-85 years) who were using glaucoma eye drops and exhibited signs of MGD. Participants underwent four sessions of IPL therapy at 3-week intervals, each followed by MGX. Evaluative measures included the Ocular Surface Disease Index (OSDI), best-corrected visual acuity, Schirmer's test, tear break-up time (TBUT), corneal fluorescein staining score (CFS), lid margin abnormalities, meibomian gland expressibility (MGE), meibum quality, lipid layer thickness (LLT), and meiboscore. These assessments were conducted before and after each treatment.
Results:
After treatment, significant improvements were observed across all measured parameters, including OSDI, Schirmer's test, TBUT, CFS, lid margin abnormalities, MGE, meibum quality, LLT, and meiboscore.
Conclusions
IPL therapy combined with MGX was effective in improving ocular surface and eyelid abnormalities among patients with MGD induced by glaucoma eye drops. Our findings support the use of IPL and MGX as safe and effective adjunct therapies for these patients.
5.Clinical Efficacy of Intense Pulsed Light Therapy in Treating Meibomian Gland Dysfunction among Glaucoma Patients
Kwang Eon HAN ; Sang Woo MOON ; Su Jin KIM ; Ji Eun LEE
Journal of the Korean Ophthalmological Society 2025;66(5):215-223
Purpose:
To evaluate the clinical efficacy of intense pulsed light (IPL) therapy combined with meibomian gland expression (MGX) in treating meibomian gland dysfunction (MGD) caused by glaucoma eye drops.
Methods:
This study included 20 patients (aged 18-85 years) who were using glaucoma eye drops and exhibited signs of MGD. Participants underwent four sessions of IPL therapy at 3-week intervals, each followed by MGX. Evaluative measures included the Ocular Surface Disease Index (OSDI), best-corrected visual acuity, Schirmer's test, tear break-up time (TBUT), corneal fluorescein staining score (CFS), lid margin abnormalities, meibomian gland expressibility (MGE), meibum quality, lipid layer thickness (LLT), and meiboscore. These assessments were conducted before and after each treatment.
Results:
After treatment, significant improvements were observed across all measured parameters, including OSDI, Schirmer's test, TBUT, CFS, lid margin abnormalities, MGE, meibum quality, LLT, and meiboscore.
Conclusions
IPL therapy combined with MGX was effective in improving ocular surface and eyelid abnormalities among patients with MGD induced by glaucoma eye drops. Our findings support the use of IPL and MGX as safe and effective adjunct therapies for these patients.
6.Stereopsis and clinical features of esotropia patients accompanied by congenital mild ptosis
Heeyoung CHOI ; Su-Jin KIM ; Seung Ahn YANG ; Kwang Eon HAN
Kosin Medical Journal 2024;39(4):259-264
Background:
To evaluate binocular function and clinical features in patients with esotropia (ET) accompanied by congenital ptosis.
Methods:
Clinical records of 44 ET patients with congenital ptosis (ET-ptosis group) and 71 age-matched ET patients without ptosis (ET only group) who presented for eye examination between January 2016 and December 2021 were retrospectively reviewed. Best-corrected visual acuity (BCVA), magnitude of esodeviation and stereopsis at the first visit were reviewed. Stereopsis and other clinical features of the two groups were compared.
Results:
The mean (±standard deviation) age of overall patients was 5.7 (±1.9) years. The margin reflex distance 1 (MRD1) of patients with ptosis was greater than 0 but less than or equal to 2, indicating that mild ptosis was included. There was no significant difference in the distribution of age, sex, spherical equivalent refractive errors, BCVA, or magnitude of ET (at distance or near) between the two groups (all p>0.05). Furthermore, stereopsis and the number of patients with amblyopia did not differ significantly between the two groups. The magnitudes of esodeviation, near stereopsis and BCVA did not differ significantly between the 0
7.Stereopsis and clinical features of esotropia patients accompanied by congenital mild ptosis
Heeyoung CHOI ; Su-Jin KIM ; Seung Ahn YANG ; Kwang Eon HAN
Kosin Medical Journal 2024;39(4):259-264
Background:
To evaluate binocular function and clinical features in patients with esotropia (ET) accompanied by congenital ptosis.
Methods:
Clinical records of 44 ET patients with congenital ptosis (ET-ptosis group) and 71 age-matched ET patients without ptosis (ET only group) who presented for eye examination between January 2016 and December 2021 were retrospectively reviewed. Best-corrected visual acuity (BCVA), magnitude of esodeviation and stereopsis at the first visit were reviewed. Stereopsis and other clinical features of the two groups were compared.
Results:
The mean (±standard deviation) age of overall patients was 5.7 (±1.9) years. The margin reflex distance 1 (MRD1) of patients with ptosis was greater than 0 but less than or equal to 2, indicating that mild ptosis was included. There was no significant difference in the distribution of age, sex, spherical equivalent refractive errors, BCVA, or magnitude of ET (at distance or near) between the two groups (all p>0.05). Furthermore, stereopsis and the number of patients with amblyopia did not differ significantly between the two groups. The magnitudes of esodeviation, near stereopsis and BCVA did not differ significantly between the 0
8.Stereopsis and clinical features of esotropia patients accompanied by congenital mild ptosis
Heeyoung CHOI ; Su-Jin KIM ; Seung Ahn YANG ; Kwang Eon HAN
Kosin Medical Journal 2024;39(4):259-264
Background:
To evaluate binocular function and clinical features in patients with esotropia (ET) accompanied by congenital ptosis.
Methods:
Clinical records of 44 ET patients with congenital ptosis (ET-ptosis group) and 71 age-matched ET patients without ptosis (ET only group) who presented for eye examination between January 2016 and December 2021 were retrospectively reviewed. Best-corrected visual acuity (BCVA), magnitude of esodeviation and stereopsis at the first visit were reviewed. Stereopsis and other clinical features of the two groups were compared.
Results:
The mean (±standard deviation) age of overall patients was 5.7 (±1.9) years. The margin reflex distance 1 (MRD1) of patients with ptosis was greater than 0 but less than or equal to 2, indicating that mild ptosis was included. There was no significant difference in the distribution of age, sex, spherical equivalent refractive errors, BCVA, or magnitude of ET (at distance or near) between the two groups (all p>0.05). Furthermore, stereopsis and the number of patients with amblyopia did not differ significantly between the two groups. The magnitudes of esodeviation, near stereopsis and BCVA did not differ significantly between the 0
9.Stereopsis and clinical features of esotropia patients accompanied by congenital mild ptosis
Heeyoung CHOI ; Su-Jin KIM ; Seung Ahn YANG ; Kwang Eon HAN
Kosin Medical Journal 2024;39(4):259-264
Background:
To evaluate binocular function and clinical features in patients with esotropia (ET) accompanied by congenital ptosis.
Methods:
Clinical records of 44 ET patients with congenital ptosis (ET-ptosis group) and 71 age-matched ET patients without ptosis (ET only group) who presented for eye examination between January 2016 and December 2021 were retrospectively reviewed. Best-corrected visual acuity (BCVA), magnitude of esodeviation and stereopsis at the first visit were reviewed. Stereopsis and other clinical features of the two groups were compared.
Results:
The mean (±standard deviation) age of overall patients was 5.7 (±1.9) years. The margin reflex distance 1 (MRD1) of patients with ptosis was greater than 0 but less than or equal to 2, indicating that mild ptosis was included. There was no significant difference in the distribution of age, sex, spherical equivalent refractive errors, BCVA, or magnitude of ET (at distance or near) between the two groups (all p>0.05). Furthermore, stereopsis and the number of patients with amblyopia did not differ significantly between the two groups. The magnitudes of esodeviation, near stereopsis and BCVA did not differ significantly between the 0
10.Two Cases of Ischemic Optic Neuropathy after Extracorporeal Membrane Oxygenation (ECMO)
Kwang Eon HAN ; Sang Yoon KIM ; Su Jin KIM
Journal of the Korean Ophthalmological Society 2024;65(6):412-416
Purpose:
We report two cases of non-arteritic ischemic optic neuropathy (NAION) following extracorporeal membrane oxygenation (ECMO) treatment.Case summary: (Case 1) A 36-year-old man underwent ECMO treatment. Upon regaining consciousness, he complained of a darkened peripheral visual field and was subsequently referred to an ophthalmologist. His best-corrected visual acuity was 0.9 in the right eye and 0.8 in the left eye. The intraocular pressure measured 12 mmHg in the right eye and 10 mmHg in the left eye; color vision was normal. A visual field test demonstrated concentric visual field defects in both eyes, and a fundus examination revealed a pale optic disc. Optical coherence tomography (OCT) indicated a decrease in retinal nerve fiber layer (RNFL) thickness. (Case 2) A 48-year-old woman underwent ECMO treatment. After regaining consciousness, she reported decreased vision in her right eye. Her best-corrected visual acuity was limited to hand motion in the right eye and was 1.2 in the left eye. A relative afferent pupillary defect in the right eye was observed. Color vision in the right eye was compromised, and a fundus examination revealed a pale optic disc. A visual field test demonstrated total visual field defect in the right eye, while OCT showed decreases in both the RNFL thickness and the ganglion cell-inner plexiform layer thickness of the right eye. Magnetic resonance imaging (MRI) revealed high signal intensity and abnormal enhancement in the right retrobulbar optic nerve.
Conclusions
In cases where vision loss and visual field defects are observed following ECMO treatment, differential diagnoses for ischemic optic neuropathy are warranted.

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