2.MRI Staging of Legg - Calve - Perthes ( LCP ) Disease.
Jae In AHN ; Kyeong Jin HAN ; Y Y WON ; C S YU ; J H CHO
The Journal of the Korean Orthopaedic Association 1998;33(5):1385-1393
One of the most important prognostic factors in LCP disease is the extent of epiphyseal involvement. Magnetic resonance imaging is considered to be the technique of choice for early diagnosis of Legg-Calve-Perthes disease. Gadolinium-enhanced spin-echo MR images were obtained after nonenhanced Tl-weighted(spin-echo) and T2-weighted(gradient-echo) images. Four different areas were identified in the femoral epiphysis(necrosis, regenerative, cartilaginous and normal fatty bone tissue). The histological evolution of LCP is well described by Catterall and others. Comparing their description with our MRI finding, we suggest classification of LCP into three phases: (I) necrosis, (II) regeneration(IIa-early and IIb-late) and (III) reossification and sequale. T2 weighted image was useful in the early stage and Tl weighted image was useful in the later stage for evaluation of involved extent of the disease. With MRI, we think that we can find out the stage of LCP more early and rationally, pathological factors more easily and appropriate time for operation exactly. we believe that MRI is more adequate method to decide the stage of LCP disease.
Classification
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Early Diagnosis
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Legg-Calve-Perthes Disease
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Magnetic Resonance Imaging*
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Necrosis
3.Clinical Features and Prognostic Factors in Primary Adenocarcinoma of the Appendix.
In J PARK ; Chang S YU ; Hee C KIM ; Jin C KIM
The Korean Journal of Gastroenterology 2004;43(1):29-34
BACKGROUND/AIMS: Primary appendiceal adenocarcinoma is a rare neoplasm that constitutes less than 0.5% of all gastrointestinal neoplasm. The aim of this study was to figure out its clinicopathologic characteristics that are not well understood. METHODS: We reviewed the medical records of nineteen patients (9 males and 10 females) with histologically proven appendiceal adenocarcinoma. They had been treated at Asan Medical Center between June 1989 and December 2002. Their median follow-up duration was 72.5 months. RESULTS: Their median age was 56.5 (range, 33~80) years. Thirteen patients had mucinous variants and the other five had adenocarcinoma. Seven patients (36.8%) were diagnosed as acute appendicitis. In fact, none of the patients was diagnosed correctly before surgery. The operative procedure, included right hemicolectomy in 9 patients, appendectomy alone in 2 patients, and debulking of their tumors or a biopsy in 8 patients. The 5-year survival rate was 20.5%. The patients with mucinous type had better prognosis than those with the non-mucinous type (p<0.01). In the patients with mucinous type, the survival rate after debulking operation was similar to that after right hemicolectomy. CONCLUSIONS: The most important prognostic factor of primary appendiceal adenocarcinoma was histology. The outcome of debulking operation is being watched compared with that of right hemicolectomy in mucinous variant.
Adenocarcinoma/*diagnosis/mortality/surgery
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Adult
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Aged
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Appendiceal Neoplasms/*diagnosis/mortality/surgery
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English Abstract
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Female
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Humans
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Male
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Middle Aged
;
Prognosis
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Survival Rate
4.Comparison of ultrasound-measured properties of the common carotid artery to tobacco smoke exposure in a cohort of Indonesian patients
Yu R. ALLEN ; Hasjim BIMA ; Yu E. LUKE ; Gabriel CHRISTOPHER ; Anshus ALEXANDER ; Lee B. JONATHAN ; Louthan J. MICHAEL ; Kim C. ESTHER ; Lee KATRINA ; Tse CHRISTINA ; Keown THOMAS ; Lahham SHADI ; Alvarado MAILI ; Bunch STEVEN ; Gari ABDULATIF ; Fox Christian J.
World Journal of Emergency Medicine 2017;8(3):177-183
BACKGROUND:The purpose of this study was to use point-of-care ultrasound (POCUS) to investigate the relationship between tobacco smoke exposure and the characteristics of the common carotid artery (CCA). The effect of both primary and secondary smoking on CCA properties was evaluated. METHODS:We performed a prospective cross-sectional study across 20 primary care clinics in Bandung, West Java, Indonesia in July 2016. Point of care ultrasound was performed on a convenience sample of Indonesian patients presenting to clinic. The CCA wall stiffness and carotid intima-media thickness (CIMT) were measured during diastole and systole. These measurements were correlated with smoke exposure and cardiovascular disease. RESULTS: We enrolled 663 patients in the study, with 426 patients enrolled in the smoking category and 237 patients enrolled in the second-hand smoke category. There was an overall positive correlation with the measured lifestyle factors and the ultrasound-measured variables in the group of individuals who smoked. For all variables, age seemed to contribute the most out of all of the lifestyle factors for the positive changes in CIMT and CCA wall stiffness. CONCLUSION:Our data yielded correlations between CCA properties and cardiovascular risk, as well as between CIMT and arterial stiffness. We were also able to demonstrate an increase in thickness of the CIMT in patients who have been exposed by tobacco through the use of ultrasound. Further large scale studies comparing patients with multiple cardiac risk factors need to be performed to confirm the utility of ultrasound findings of cardiovascular disease and stroke.
5.Incomplete spondylolysis of the first sacrum: a case report.
Shi-sheng HE ; Ying-chuan ZHAO ; B J C FREEMAN ; Zhi-cai SHI ; Ming LI ; Ye ZHANG ; Lin YU
Chinese Medical Journal 2010;123(2):248-249
Adolescent
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Female
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Humans
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Sacrum
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pathology
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surgery
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Spondylolysis
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diagnosis
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pathology
;
surgery
6.The use of traditional Chinese medicine among breast cancer patients: implications for the clinician.
Kar Yong WONG ; Ern Yu TAN ; Juliana J C CHEN ; Christine TEO ; Patrick M Y CHAN
Annals of the Academy of Medicine, Singapore 2014;43(2):74-78
INTRODUCTIONTraditional Chinese Medicine or Traditional Complementary Medicine (TCM) is commonly used in our culture. There are several concerns regarding its use in patients undergoing conventional treatments for breast cancer. In this study, we aimed to evaluate the prevalence and pattern of TCM use among our breast cancer patients, and to identify patients who were most likely to choose TCM.
MATERIALS AND METHODSA total of 300 patients on active follow-up with Breast Service at Tan Tock Seng Hospital were interviewed using a structured questionnaire.
RESULTSA total of 35% (104 of 296) of patients reported using TCM. The majority of the patients were introduced to TCM by family and friends following the diagnosis of breast cancer. All except 3 patients continued with recommended conventional therapy although most did not inform their clinicians of TCM use. None of the patients reported any serious adverse events and 75% of them perceived a benefit from TCM use. Younger patients and those of Chinese ethnicity were more likely to use TCM (P <0.01 and P = 0.03 respectively). There was no significant difference in the dialect group, religious beliefs and educational level between the 2 groups (P >0.05).
CONCLUSIONTCM use is common among our breast cancer patients, particularly the younger women. However, most patients do not inform their clinicians of TCM use while on recommended conventional therapies. It is therefore important for clinicians to initiate discussions regarding TCM use in order to be aware of potential unwanted drug interactions.
Adult ; Aged ; Aged, 80 and over ; Breast Neoplasms ; therapy ; Female ; Humans ; Medical Oncology ; Medicine, Chinese Traditional ; utilization ; Middle Aged
7.Limiting the use of primary endocrine therapy in elderly women with breast cancer.
Shaun W Y CHAN ; Patrick M Y CHAN ; Melanie D W SEAH ; Juliana J C CHEN ; Ern Yu TAN
Annals of the Academy of Medicine, Singapore 2014;43(9):469-472
Primary endocrine therapy (PET) is often included as a treatment option in elderly women with operable breast cancer. Elderly women tend to have pre-existing comorbidities and are often reluctant to undergo surgery. The benefit of surgery needs to be weighed against a relatively higher potential for operative morbidity and mortality, and a limited life expectancy. But while PET can provide relatively good locoregional control, it is not curative in nature and the possibility of local complications and metastasis remains. We retrospectively reviewed the outcome of PET in a series of 19 elderly women, older than 70 years of age, who had presented with operable non-metastatic breast cancer. Only about a third of these women were deemed medically unfit for surgery; the rest had declined surgery. Compliance was an issue, with almost half of these patients defaulting treatment and follow-up. Local control was achieved in most patients, but disease progression did occur in 5 patients. Three of these patients received additional treatment; which included surgery in 1 patient. PET should therefore not be considered an equivalent alternative to surgery in elderly women who were fi t to undergo surgery. However, having observed that only 1 of the 6 deaths in our study was related to breast cancer, PET does have a role in women whose life expectancy is more likely to be limited by coexisting morbidities than the breast cancer itself.
Aged
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Aged, 80 and over
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Antineoplastic Agents, Hormonal
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therapeutic use
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Breast Neoplasms
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drug therapy
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Drug Therapy
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utilization
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Female
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Humans
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Retrospective Studies
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Tamoxifen
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therapeutic use
8.Complement activation by phospholipids: the interplay of factor H and C1q.
Lee Aun TAN ; Bingbin YU ; Francis C J SIM ; Uday KISHORE ; Robert B SIM
Protein & Cell 2010;1(11):1033-1049
Complement proteins in blood recognize charged particles. The anionic phospholipid (aPL) cardiolipin binds both complement proteins C1q and factor H. C1q is an activator of the complement classical pathway, while factor H is an inhibitor of the alternative pathway. To examine opposing effects of C1q and factor H on complement activation by aPL, we surveyed C1q and factor H binding, and complement activation by aPL, either coated on microtitre plates or in liposomes. Both C1q and factor H bound to all aPL tested, and competed directly with each other for binding. All the aPL activated the complement classical pathway, but negligibly the alternative pathway, consistent with accepted roles of C1q and factor H. However, in this system, factor H, by competing directly with C1q for binding to aPL, acts as a direct regulator of the complement classical pathway. This regulatory mechanism is distinct from its action on the alternative pathway. Regulation of classical pathway activation by factor H was confirmed by measuring C4 activation by aPL in human sera in which the C1q:factor H molar ratio was adjusted over a wide range. Thus factor H, which is regarded as a down-regulator only of the alternative pathway, has a distinct role in downregulating activation of the classical complement pathway by aPL. A factor H homologue, β2-glycoprotein-1, also strongly inhibits C1q binding to cardiolipin. Recombinant globular domains of C1q A, B and C chains bound aPL similarly to native C1q, confirming that C1q binds aPL via its globular heads.
Animals
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Complement Activation
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Complement C1q
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chemistry
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metabolism
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Complement Factor H
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metabolism
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Humans
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Immunoglobulin G
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metabolism
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Mice
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Phospholipids
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chemistry
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metabolism
;
Protein Binding
9.Differential Analysis of Heart Rate Variability in Repeated Continuous Performance Tests Among Healthy Young Men
Chung-Chih HSU ; Tien-Yu CHEN ; Jia-Yi LI ; Terry B. J. KUO ; Cheryl C. H. YANG
Psychiatry Investigation 2025;22(2):148-155
Objective:
Executive function correlates with the parasympathetic nervous system (PNS) based on static heart rate variability (HRV) measurements. Our study advances this understanding by employing dynamic assessments of the PNS to explore and quantify its relationship with inhibitory control (IC).
Methods:
We recruited 31 men aged 20–35 years. We monitored their electrocardiogram (ECG) signals during the administration of the Conners’ Continuous Performance Test-II (CCPT-II) on a weekly basis over 2 weeks. HRV analysis was performed on ECG-derived RR intervals using 5-minute windows, each overlapping for the next 4 minutes to establish 1-minute intervals. For each time window, the HRV metrics extracted were: mean RR intervals, standard deviation of NN intervals (SDNN), low-frequency power with logarithm (lnLF), and high-frequency power with logarithm (lnHF). Each value was correlated with detectability and compared to the corresponding baseline value at t0.
Results:
Compared with the baseline level, SDNN and lnLF showed marked decreases during CCPT-II. The mean values of HRV showed significant correlation with d’, including mean SDNN (R=0.474, p=0.012), mean lnLF (R=0.390, p=0.045), and mean lnHF (R=0.400, p=0.032). In the 14th time window, the significant correlations included SDNN (R=0.578, p=0.002), lnLF (R=0.493, p=0.012), and lnHF (R=0.432, p=0.031). Significant correlation between d’ and HRV parameters emerged only during the initial CCPT-II.
Conclusion
A significant correlation between PNS and IC was observed in the first session alone. The IC in the repeated CCPT-II needs to consider the broader neural network.
10.Differential Analysis of Heart Rate Variability in Repeated Continuous Performance Tests Among Healthy Young Men
Chung-Chih HSU ; Tien-Yu CHEN ; Jia-Yi LI ; Terry B. J. KUO ; Cheryl C. H. YANG
Psychiatry Investigation 2025;22(2):148-155
Objective:
Executive function correlates with the parasympathetic nervous system (PNS) based on static heart rate variability (HRV) measurements. Our study advances this understanding by employing dynamic assessments of the PNS to explore and quantify its relationship with inhibitory control (IC).
Methods:
We recruited 31 men aged 20–35 years. We monitored their electrocardiogram (ECG) signals during the administration of the Conners’ Continuous Performance Test-II (CCPT-II) on a weekly basis over 2 weeks. HRV analysis was performed on ECG-derived RR intervals using 5-minute windows, each overlapping for the next 4 minutes to establish 1-minute intervals. For each time window, the HRV metrics extracted were: mean RR intervals, standard deviation of NN intervals (SDNN), low-frequency power with logarithm (lnLF), and high-frequency power with logarithm (lnHF). Each value was correlated with detectability and compared to the corresponding baseline value at t0.
Results:
Compared with the baseline level, SDNN and lnLF showed marked decreases during CCPT-II. The mean values of HRV showed significant correlation with d’, including mean SDNN (R=0.474, p=0.012), mean lnLF (R=0.390, p=0.045), and mean lnHF (R=0.400, p=0.032). In the 14th time window, the significant correlations included SDNN (R=0.578, p=0.002), lnLF (R=0.493, p=0.012), and lnHF (R=0.432, p=0.031). Significant correlation between d’ and HRV parameters emerged only during the initial CCPT-II.
Conclusion
A significant correlation between PNS and IC was observed in the first session alone. The IC in the repeated CCPT-II needs to consider the broader neural network.