1.Adolescent Varicocele: Are Somatometric Parameters a Cause?.
Kwonho BAE ; Hong Seok SHIN ; Hyun Jin JUNG ; Seok Hyun KANG ; Byung Soo JIN ; Jae Shin PARK
Korean Journal of Urology 2014;55(8):533-535
PURPOSE: It has been reported that varicocele is found less frequently in obese men. Accordingly, we evaluated varicocele patients and statistically analyzed the correlation between varicocele and somatometric parameters. MATERIALS AND METHODS: A total of 211 patients underwent surgery for varicoceles. All patients underwent history taking, physical examination, and scrotal ultrasound to determine the presence and severity of varicocele. An age-matched control group consisted of 102 patients who were found not to have varicocele according to physical examinations and scrotal ultrasound. The age, weight, height, and body mass index (BMI) of the two groups were compared. The statistical analyses were performed by use of PASW Statistics ver. 18.0. A p-value of less than 0.05 was used for statistical significance. RESULTS: In the varicocele group, the mean age, height, weight, and BMI were 29.42+/-14.01 years, 168.53+/-9.97 cm, 62.14+/-13.17 kg, and 21.66+/-3.21 kg/m2, respectively. The distribution of varicocele grade was as follows: 103 (48.8%) grade III, 72 (34.1%) grade II, and 36 (17.1%) grade I. In the control group, the mean age, height, weight, and BMI were 30.83+/-17.31 years, 161.93+/-19.83 cm, 64.69+/-17.86 kg, and 24.04+/-3.64 kg/m2, respectively. Analyzing these data specifically in adolescents, they showed significant differences in age, height, and BMI (p=0.000, p=0.000, and p=0.004, respectively) between two groups. There were no significant differences in somatometric parameters between patients with different grades of varicocele. CONCLUSIONS: Our results showed that patients with varicoceles were significantly taller and had a lower BMI than did patients without varicoceles, especially among adolescents. Carefully designed future studies may be needed.
Adolescent
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Adult
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Anthropometry/methods
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Body Height/physiology
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Body Mass Index
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Body Weight/physiology
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Case-Control Studies
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Humans
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Male
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Scrotum/ultrasonography
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Varicocele/*etiology/physiopathology/ultrasonography
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Young Adult
2.Chondrocutaneous Branchial Remnant in Cervical Region: A Case Report.
Sung No JUNG ; Hong Sil JU ; Jong Phil CHOI ; Ho KWON
Journal of the Korean Cleft Palate-Craniofacial Association 2004;5(1):58-60
Cervical chondrocutaneous branchial remnants are rare and one of several maformations resulting from abnormal development of the branchial apparatus. These lesions are usually located over or near the insertions of the sternocleidomastoid muscles in the lower neck. It is important to recognize that they may be a visible marker for other malformations and/or anomalies. Treatment is complete surgical removal as promptly as possible in order to get an exact histopathological diagnosis. In this article, we report a rare case of cervical chondrocutaneous branchial remnants and some reviews of the literature.
Diagnosis
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Muscles
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Neck
3.Embryonic Stem Cells Lacking DNA Methyltransferases Differentiate into Neural Stem Cells that Are Defective in Self-Renewal
Bong Jong SEO ; Tae Kyung HONG ; Sang Hoon YOON ; Jae Hoon SONG ; Sang Jun UHM ; Hyuk SONG ; Kwonho HONG ; Hans Robert SCHÖLER ; Jeong Tae DO
International Journal of Stem Cells 2023;16(1):44-51
Background and Objectives:
DNA methyltransferases (Dnmts) play an important role in regulating DNA methylation during early developmental processes and cellular differentiation. In this study, we aimed to investigate the role of Dnmts in neural differentiation of embryonic stem cells (ESCs) and in maintenance of the resulting neural stem cells (NSCs).
Methods:
and Results: We used three types of Dnmt knockout (KO) ESCs, including Dnmt1 KO, Dnmt3a/3b double KO (Dnmt3 DKO), and Dnmt1/3a/3b triple KO (Dnmt TKO), to investigate the role of Dnmts in neural differentiation of ESCs. All three types of Dnmt KO ESCs could form neural rosette and differentiate into NSCs in vitro. Interestingly, however, after passage three, Dnmt KO ESC-derived NSCs could not maintain their self-renewal and differentiated into neurons and glial cells.
Conclusions
Taken together, the data suggested that, although deficiency of Dnmts had no effect on the differentiation of ESCs into NSCs, the latter had defective maintenance, thereby indicating that Dnmts are crucial for self-renewal of NSCs.