1.Occurrence of contralateral breast cancer in a BRCA-positive breast cancer patient who underwent free TRAM flap reconstruction: a case report
Nonhyun HA ; Nakwon CHOI ; Yujin MYUNG ; Chan Yeong HEO
Archives of Aesthetic Plastic Surgery 2024;30(3):117-120
This report presents a case of contralateral breast cancer in a BRCA mutation-positive patient who had previously undergone delayed free transverse rectus abdominis myocutaneous flap reconstruction for unilateral breast cancer. Having used up the available abdominal autologous tissue in the first reconstruction, a direct-to-implant procedure was employed for the reconstruction of the second, contralateral breast. Therefore, one breast was reconstructed using autologous tissue from the abdomen, while the other was asymmetrically reconstructed with an implant. If the risk of contralateral breast cancer had been anticipated initially, we might have opted for implant-based reconstruction from the start to facilitate a more symmetrical outcome in the event of subsequent contralateral reconstruction. This case underscores the importance of reviewing the risk of contralateral breast cancer in patients with unilateral breast cancer who also carry mutations in BRCA and other breast cancer susceptibility genes. Furthermore, it encourages consideration of how mutations in breast cancer susceptibility genes, including BRCA, influence the choice of plastic surgery reconstruction techniques. The findings from genetic testing for breast cancer susceptibility are now crucial to achieving aesthetic completeness in breast reconstruction.
2.Synergistic Effect of Whitlockite Scaffolds Combined with Alendronate to Promote Bone Regeneration
Jiwoon JEONG ; Jung Hee SHIM ; Bum Mo KOO ; Young Bin CHOY ; Chan Yeong HEO
Tissue Engineering and Regenerative Medicine 2022;19(1):83-92
BACKGROUND:
Due to the increasing aging of society, the number of patients suffering from senile diseases is increasing. Patients suffering from osteoporosis, which is a representative senile disease, take a long time to recover from fractures, and the resulting mortality rate is very high. Alendronate (Ald), which is widely used as a treatment for osteoporosis, alleviates osteoporosis by inhibiting osteoclasts. In addition, whitlockite (WH) promotes the osteogenic differentiation of bone cells and improves bone regeneration. Therefore, we intended to bring about a synergistic effect by using these substances together.
METHODS:
In this study, a scaffold composed of gelatin/heparin was fabricated and applied to effectively use WH and Ald together. A scaffold was constructed using gelatin and heparin was used to effectively utilize the cations released from WH. In addition, it formed a porous structure for effective bone regeneration. In vitro and in vivo osteoclast inhibition, osteogenic differentiation, and bone regeneration were studied using the prepared scaffolds.
RESULTS:
The inhibition of osteoclast was much higher when WH and Ald were applied in combination rather than individually. The highest level of osteogenic differentiation was observed when both substances were applied simultaneously. In addition, when applied to bone regeneration through the mouse calvarial defect model, combined treatment showed excellent bone regeneration.
CONCLUSION
Therefore, this study showed the synergistic effect of WH and Ald, and it is suggested that better bone regeneration is possible by applying this treatment to bones with fractures that are difficult to regenerate.
3.Efficacy of breast augmentation using an external breast tissue expander for a shorter period while applying higher pressure: a preliminary study
Jeongseok OH ; Minseo KIM ; Joonseok OH ; Chan Yeong HEO
Archives of Aesthetic Plastic Surgery 2022;28(1):9-16
Background:
Various types of external breast tissue expanders have been found to be effective for aesthetic breast augmentation. However, their use has been limited when compared with implant-based breast augmentation due to the burdensome nature of their application. This article reports the possibility that external breast tissue expanders may be applied safely and effectively with higher pressure and shorter application time.
Methods:
The participants comprised patients who desired breast augmentation using the EVERA-RAPHA device between January 2020 and March 2020. A double-blinded prospective study was conducted on two groups of eight patients each, with either 60 mmHg or 100 mmHg of pressure applied. Standardized photographs were taken and blinded measurements of volume and circumference were made. The Mann-Whitney and paired t-tests were conducted.
Results:
Sixteen patients were evaluated after 1 month of treatment. The women in groups 1 and 2 (60 mmHg and 100 mmHg, respectively) used EVERA-RAPHA for 15.400± 0.704 and 15.300±0.477 minutes per day, respectively. The mean volume increases in groups 1 and 2 were 39.000±42.526 cc and 27.700±20.260 cc, respectively. No patients dropped out of the study. All patients reported that the device was tolerable. Mild bruising was found in 62.5% of the patients in group 2.
Conclusions
Breast augmentation using external tissue expanders can be a safe, effective, and practical option. Pressures of 60 mmHg or 100 mmHg can be safely applied for a shorter duration. Larger studies are needed to further confirm our findings.
4.Acellular dermal matrix and bone cement sandwich technique for chest wall reconstruction
Chan Yeong HEO ; Byungkwon KANG ; Jae Hoon JEONG ; Kwhanmien KIM ; Yujin MYUNG
Archives of Plastic Surgery 2022;49(1):25-28
The authors performed rigid reconstruction using the sandwich technique for full-thickness chest wall defects by using two layers of acellular dermal matrix and bone cement. We assessed six patients who underwent chest wall reconstruction. Reconstruction was performed by sandwiching bone cement between two layers of acellular dermal matrix. In all patients, there was no defect of the overlying soft tissue, and primary closure was performed for external wounds. The average follow-up period was 4 years (range, 2–8 years). No major complications were noted. The sandwich technique can serve as an efficient and safe option for chest wall reconstruction.
5.A Study of Dry Mouth and Gastrointestinal Disorders in Patients Taking Antidepressant
Yeong-Jin HEO ; Chan-Mo YANG ; Hye-Jin LEE ; Sang-Yeol LEE ; Seung-Ho JANG
Mood and Emotion 2022;20(1):15-22
Background:
The purpose of this study was to identify the characteristics of dry mouth and gastrointestinal (GI) disorders in antidepressant patients.
Methods:
The study included 103 antidepressant-taking patients. Antidepressants were classified according to their mode of action. The GI disorders were investigated using the medical records of the patients. The Patient Health Questionnaire-15 and a questionnaire for assessing dry mouth symptoms were used in this study.
Results:
The score for “overall discomfort due to dry mouth in daily life” (31.72±33.82), “dry mouth at night or in the morning” (47.86±35.87), and “dry mouth during the day” (39.83±31.67) were slightly higher than “discomfort in chewing or swallowing foods”. According to somatization severity, the mean values were 116.36±113.34 in the mild, 213.18±136.98 in the moderate, and 277.59±201.44 in the severe, the between-group difference was significant (F=10.294, p<0.001). According to the class of antidepressants, the mean score was 180.00±147.5 for vortioxetine, 194.25±169.33 for selective serotonin reuptake inhibitors (SSRIs), 223.61±156.70 for serotonin and norepinephrine reuptake inhibitors (SNRIs), 75.00±57.00 for norepinephrine dopamine reuptake inhibitors (NDRIs), 201.67±174.66 for Nassau, and 116.67±132.03 for agomelatine. A total of 67 (65.0%) patients had at least one GI disorder.
Conclusion
The study findings are expected to help increase medication compliance in antidepressant patients by better controlling the side effects experienced by the patients.
6.Effects of low-level laser therapy and adipose-derived stem cells on the viability of autologous fat grafts: a preliminary study
Chan Yeong HEO ; Young Soo YOON ; Kyung Hee MIN ; Sun Young NAM ; Kyu Sang LEE ; Byung Ho SHIN ; Seunghee LEE ; Miji LEE
Archives of Aesthetic Plastic Surgery 2021;27(3):81-87
Background:
Autologous fat grafts are commonly used in cosmetic and reconstructive surgery, and various methods are used to improve their viability. Low-level laser therapy (LLLT) can enhance the proliferation, growth, and differentiation of various cell lines, including stem cells. Our study investigated and compared the effects of LLLT and the addition of adipose-derived stem cells (ADSCs) on the viability of fat grafts.
Methods:
Twenty nude mice were divided into four groups: control (group 1), LLLT irradiation (group 2), ADSC addition (group 3), and LLLT irradiation+ADSC addition (group 4). ADSCs were combined with the fat tissue. LLLT irradiation was performed once daily for 1 week from the day of grafting. After 8 weeks, the weight, volume, histology, and Western blot findings of the grafted fat tissues were evaluated.
Results:
The retention rate and volume of the fat tissue in groups 2, 3, and 4 were higher than that of group 1, but the difference was not statistically significant. The number of capillaries, histological parameters, and immunofluorescence staining analyses for CD68, CD31, fibroblast growth factor, and vascular endothelial growth factor (VEGF) showed no significant differences among the four groups. The expression level of VEGF was higher in group 2 than in the other groups, but not to a statistically significant level.
Conclusions
LLLT and ADSCs did not significantly improve the viability of autologous fat grafts. Therefore, further study is necessary to develop safe and effective methods to improve the viability of these grafts for clinical application.
7.2020 Korean Guidelines for Cardiopulmonary Resuscitation. Part 8. Neonatal resuscitation
Ju Sun HEO ; Su Yeong KIM ; Hye Won PARK ; Yong-Sung CHOI ; Chan-Wook PARK ; Geum Joon CHO ; Ah Young OH ; Eun Kyung JANG ; Han-Suk KIM ; Ai-Rhan Ellen KIM ; Sung Oh HWANG ;
Clinical and Experimental Emergency Medicine 2021;8(S):S96-S115
8.Effects of low-level laser therapy and adipose-derived stem cells on the viability of autologous fat grafts: a preliminary study
Chan Yeong HEO ; Young Soo YOON ; Kyung Hee MIN ; Sun Young NAM ; Kyu Sang LEE ; Byung Ho SHIN ; Seunghee LEE ; Miji LEE
Archives of Aesthetic Plastic Surgery 2021;27(3):81-87
Background:
Autologous fat grafts are commonly used in cosmetic and reconstructive surgery, and various methods are used to improve their viability. Low-level laser therapy (LLLT) can enhance the proliferation, growth, and differentiation of various cell lines, including stem cells. Our study investigated and compared the effects of LLLT and the addition of adipose-derived stem cells (ADSCs) on the viability of fat grafts.
Methods:
Twenty nude mice were divided into four groups: control (group 1), LLLT irradiation (group 2), ADSC addition (group 3), and LLLT irradiation+ADSC addition (group 4). ADSCs were combined with the fat tissue. LLLT irradiation was performed once daily for 1 week from the day of grafting. After 8 weeks, the weight, volume, histology, and Western blot findings of the grafted fat tissues were evaluated.
Results:
The retention rate and volume of the fat tissue in groups 2, 3, and 4 were higher than that of group 1, but the difference was not statistically significant. The number of capillaries, histological parameters, and immunofluorescence staining analyses for CD68, CD31, fibroblast growth factor, and vascular endothelial growth factor (VEGF) showed no significant differences among the four groups. The expression level of VEGF was higher in group 2 than in the other groups, but not to a statistically significant level.
Conclusions
LLLT and ADSCs did not significantly improve the viability of autologous fat grafts. Therefore, further study is necessary to develop safe and effective methods to improve the viability of these grafts for clinical application.
9.2020 Korean Guidelines for Cardiopulmonary Resuscitation. Part 8. Neonatal resuscitation
Ju Sun HEO ; Su Yeong KIM ; Hye Won PARK ; Yong-Sung CHOI ; Chan-Wook PARK ; Geum Joon CHO ; Ah Young OH ; Eun Kyung JANG ; Han-Suk KIM ; Ai-Rhan Ellen KIM ; Sung Oh HWANG ;
Clinical and Experimental Emergency Medicine 2021;8(S):S96-S115
10.Pathogenesis and prevention of pressure ulcer
Gyeonghyeon DOH ; Chan Yeong HEO
Journal of the Korean Medical Association 2021;64(1):16-25
The number of pressure ulcer patients is increasing owing to the aging population and increased incidence of elderly illness. This review article aims to introduce the current knowledge on the pathogenesis and prevention of pressure ulcers. The development of a pressure ulcer is associated with external factors such as pressure, shear stress, and friction and internal factors such as age, general condition, skin condition, and nutritional status. Pressure ulcers typically develop over bone protrusions, which are most pressured by weight, but may also be caused by external pressure by medical devices or other objects applied to the patient. This tissue damage is caused by continuous deformation of the tissue due to the pressure acting perpendicular to the tissue surface and shear stress acting parallel to the tissue, either alone or in combination. Limitation of activity and mobility, skin condition, blood circulation and oxygen saturation, nutrition, humidity, body temperature, age, low pain sensitivity, blood count, and general and mental conditions are the primary risk factors for pressure ulcers. A mattress and cushion that reduce pressure and an appropriate posture are necessary to prevent pressure ulcers. In patients with urinary incontinence, contaminated skin should be washed with a mild detergent and absorbent pads and topical protective agents should be used to protect the skin from moisture. Sufficient nutrition may help prevent wounds in patients who are susceptible to pressure ulcers. Furthermore, early screening, individualized management of posture, and regular skin and nutrition monitoring are essential to prevent pressure ulcers.

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