1.Clinical significance of urinary growth hormone measurement in patients with growth hormone deficiency.
Ho Seong KIM ; Duk Hi KIM ; Min Seok CHEON
Journal of the Korean Pediatric Society 1993;36(4):478-484
Urinary growth hormone (GH) excretion was quantitated in 12-hr overnight urine collections obtained from 13 children with complete growth hormone deficiency (CGHD). 6 children with partial growth hormone deficiency (PGHD), 5 children with short stature and normal GH provocation tests (NSC), and 5 normal control children (NC) to investigate whether the measurement of urinary GH can clearly separate the PGHD and CGHD groups from the NSC and NC groups. In addition, the urinary excretion of GH was measured in CGHD after sc injections of 0.1 IU/kg GH three times a week and daily in an attempt to determine the optimal replacement dose. The results were as follows. 1) The 12-hr urinary GH excretion cleary separated the CGHD (1.2+/-1.1 ng/12 hr; range, 0.3-3.1, n=13) and PGHD (3.7+/-2.4 ng/12 hr; range, 0.9-6.8 n=6) groups from the NSC (14.0+/-3.6 ng/12 hr; range, 8.5-18.2 n=5) and NC (12.7+/-5.8 ng/12 hr; range, 6.9-20.8, n=5) groups without any overlap. 2) There were significant difference in 12-hr urinary GH excretion between CGHD and PGHD, but the higher values in CGHD groups overlapped some of the lower values in PGHD group. 3) There were no differencies in 12-hr urinary GH excretion between NC and NSC. 4) A 12-hr urinary GH values less than 6.9 ng/12 hr suggested GH deficiency. 5) The CGHD patients who received o.1 IU/kg GH. sc. daily GH levels within the range of the mean +/-SD in NC. but those who received theree times a week had daily variable urinary GH levels. These results suggest that the measurement of 12-hr nocturnal urinary GH excretion monitering of GH therapy response.
Child
;
Growth Hormone*
;
Humans
;
Urine Specimen Collection
2.Influence of Gating and Attenuation-correction for Diagnostic Performance of Usual Rest/stress Myocardial Perfusion SPECT in Coronary Artery Disease.
Myung Chul LEE ; June Key CHUNG ; Dong Soo LEE ; Kyeong Min KIM ; Young SO ; Jeong Seok YEO ; Gi Jeong CHEON
Korean Journal of Nuclear Medicine 1999;33(2):131-142
PURPOSE: Either gated myocardial perfusion SPECT or attenuation corrected SPECT can be used to improve specificity in the diagnosis of coronary artery disease. We investigated in this study whether gating or attenuation correction improved diagnostic performance of rest/stress perfusion SPECT in patients having intermediate pre-test likelihood of coronary artery disease. MATERIALS AND METHODS: Sixty-eight patients underwent rest attenuation-corrected T1-20l/dipyridamole stress gated attenuation-corrected Tc-99m-MIBI SPECT using an ADAC vertex camera (M:F=29:39, aged 59+/-12 years, coronary artery stenosis> or =70%. one vessel: 13, two vessel: 18, three vessel: 8, normal: 29). Using a five-point scale, three physicians graded the post-test likelihood of coronary artery disease for each arterial territory (1 normal, 2: possibly normal 3:equivocal, 4: possibly abnormal, 5: abnormal). Sensitivity, specificity and area under receiver-operating-characteristic curves were compared for each operator between three METHODS: (A) non-attenuation-corrected SPECT; (B) gated SPECT added to (A); and (C) attenuation-corrected SPECT added to (B). RESULTS: When grade 3 was used as the criteria for coronary artery disease, no differences in sensitivity and specificity were found between the three methods for each operator Areas under receiver- operating-characteristic curves for diagnosis of coronary artery disease revealed no differences between each modality (p>005). CONCLUSION: In patients at intermediate risk of coronary artery disease, gated SPECT and attenuation-corrected SPECT did not improve diagnostic performance.
Coronary Artery Disease*
;
Coronary Vessels*
;
Diagnosis
;
Humans
;
Perfusion*
;
ROC Curve
;
Sensitivity and Specificity
;
Tomography, Emission-Computed, Single-Photon*
3.The Initial Experience with 3rd Generation Nephron-sparing Cryoablation for Renal Tumor.
Min Gu PARK ; Seok Ho KANG ; Jun CHEON
Korean Journal of Urology 2007;48(4):363-370
PURPOSE: We report here on our initial experience with 3rd generation nephron-sparing renal cryoablation, which is one of the minimal invasive nephron-sparing surgeries. MATERIALS AND METHODS: We enrolled 10 patients who had renal neoplasm identified on computed tomography (CT) and who underwent 3rd generation cryoablation from August 2004 to May 2006. The operative indications were a tumor less than 4cm in diameter, an exophytic mass with malignant potential and those cases like solitary kidney, bilateral tumor or renal insufficiency that needed preservation of renal function. Eight patients underwent minimal incision open cryoablation, and the other two underwent laparoscopic cryoablation. In every case, there were 2-3 cycles of freeze and thawing and we monitored the tumor and ice ball via intraoperative ultrasound. RESULTS: The size of the iceball was maintained more than 1cm apart from the margin of the tumor to secure a safety margin. The average operation time of open cryoablation was 1.7 hr and that of laparoscopic cryoablation was 2.2 hr; the average blood loss was 194cc and 55cc, respectively. The average period of hospitalization after operation was 6.6 days and 3 days, respectively, and there was no complication except for one patient who had postoperative pulmonary effusion. During a mean follow-up of 14.1 months, no patient died and all the patients except one remained without local recurrence. CONCLUSIONS: As a result of our initial experience, renal cryoablation turned out to have an excellent effect of tumor erradication and few complications. Although long term follow-up results are necessary, laparoscopic renal cryoablation is considered a minimal invasive nephron- sparing surgery that could be substituted for laparoscopic partial nephrectomy in the future.
Cryosurgery*
;
Follow-Up Studies
;
Hospitalization
;
Humans
;
Ice
;
Kidney
;
Kidney Neoplasms
;
Nephrectomy
;
Recurrence
;
Renal Insufficiency
;
Ultrasonography
4.Optic Nerve Evulsion: 1 case report.
Min Cheol SHIN ; Jong Kuk HA ; Jin Seok OH
Journal of the Korean Ophthalmological Society 1998;39(4):800-804
Optic nerve evulsion is a visually devastating and rare manifestation resulting in sudden visual loss after ocular trauma. The several hypothesis of mechanism include penetrating orbital injury causing a backward pull on the optic nerve, extreme rotation and forward displacement of the globe, and sudden increase in intraocular pressure causing rupture of the lamina cribrosa. The authors report a case of optic nerve evulsion in a 25- year old man who was struck in the right eye with a umbrella. The diagnosis was made by fundoscopic findings, fluorescein angiography, visual evoked potential, electroretinography, orbit computed tomography and magnetic resonance image.
Diagnosis
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Electroretinography
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Evoked Potentials, Visual
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Fluorescein Angiography
;
Intraocular Pressure
;
Optic Nerve*
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Orbit
;
Rupture
5.Voxel‑Based Internal Dosimetry for 177 Lu‑Labeled Radiopharmaceutical Therapy Using Deep Residual Learning
Keon Min KIM ; Min Sun LEE ; Min Seok SUH ; Gi Jeong CHEON ; Jae Sung LEE
Korean Journal of Nuclear Medicine 2023;57(2):94-102
Purpose:
In this study, we propose a deep learning (DL)–based voxel-based dosimetry method in which dose maps acquired using the multiple voxel S-value (VSV) approach were used for residual learning.
Methods:
Twenty-two SPECT/CT datasets from seven patients who underwent 177 Lu-DOTATATE treatment were used in this study. The dose maps generated from Monte Carlo (MC) simulations were used as the reference approach and target images for network training. The multiple VSV approach was used for residual learning and compared with dose maps generated from deep learning. The conventional 3D U-Net network was modified for residual learning. The absorbed doses in the organs were calculated as the mass-weighted average of the volume of interest (VOI).
Results:
The DL approach provided a slightly more accurate estimation than the multiple-VSV approach, but the results were not statistically significant. The single-VSV approach yielded a relatively inaccurate estimation. No significant difference was noted between the multiple VSV and DL approach on the dose maps. However, this difference was prominent in the error maps. The multiple VSV and DL approach showed a similar correlation. In contrast, the multiple VSV approach underestimated doses in the low-dose range, but it accounted for the underestimation when the DL approach was applied.
Conclusion
Dose estimation using the deep learning–based approach was approximately equal to that in the MC simulation. Accordingly, the proposed deep learning network is useful for accurate and fast dosimetry after radiation therapy using 177 Lu-labeled radiopharmaceuticals.
6.Penoplasty Using Liposuction in the Treatment of Concealed Penis.
Su Cheon LEE ; Young ln CHOI ; Hee Seok CHOI ; Rong Min PAIK ; Seok San PARK
Korean Journal of Urology 1994;35(11):1261-1264
In obese children, the phallus may be camouflaged by excessive deposition of fat at prepubic area. Recently, concealed penis has begun to receive the more attention about possibility of its urologic correction. Between February 1993 and February l994, we treated 5 patients with concealed penis. All patients were prepuberty, their phalli are palpated normal in size and no specific abnormal findings were detected in preoperative evaluation including physical examination, laboratory examinations (CBC, platelet, PT, PTT, liver function test, urinalysis, hormonal assay, chromosomal study). 2 of 5 patients were circumcised and 1 of 5 patient had a history of penoplasty without liposuction. The phallus length were measured 0cm to 0.5cm (mean 0.2cm) preoperatively, 3.5cm to 4.5cm (mean 4.0cm) postoperatively and 3.5cm to 4.2cm (mean 3.9cm) at 3 months after operation. In conclusion, we suggest that penoplasty using liposuction produces a good functional and cosmetic results.
Blood Platelets
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Child
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Humans
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Lipectomy*
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Liver Function Tests
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Male
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Penis*
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Physical Examination
;
Urinalysis
7.Analysis of rpoB Gene in Rifampin-Resistant M. Tuberculosis by Direct Sequencing and Line Probe Assay.
Min Ki LEE ; Yun Seong KIM ; Hyo Jin LEE ; Du Su CHEON ; Sang Myung YUN ; Sam Seok PARK ; Cheol Min KIM ; Soon Kew PARK
Tuberculosis and Respiratory Diseases 1997;44(2):251-263
BACKGROUND: The emergence of multidrug-resistant strains of Mycobacterium tuberculosis presents a significant challange to the treatment and control of tuberculosis, and there is an urgent need to understand the mechanisms by which strains acquire multidrug resistance. Recent advances in molecular methods for the detection of M. tuberculosis genetic targets have approached the sensitivity of culture Furthermore the prospect of determining resistance in mycobacteria at the nucleic acid level particulary to first-line drugs like rifampin, isoniazid has provided a glimps of the next generation of sensitivity test for M. tuberculosis. Previous studies in RMP resistant M. tuberculosis have shown that mutation in beta subunit of RNA polymerase is main mechanism of resistance. METHOD: In this study, rpoB gene for the ~3 subunit of RNA polymerase from M. tuberculosis of 42 cultured samples (32 were RMP resistant and 10 were sensitive cases) were isolated and characterised the mutations. Direct sequencing data were compared with the results of INNO-LiPA Line Probe Assay (LiPA, Innogenetics, Belgium), commercial RMP resistance detecting kit using reverse hybridization method. RESULTS: All of the RMP resistant samples were revealed the presence of mutation by LiPA. In 22 samples (68.8%) out of 32 RMP resistant cases, the mutation types were confirmed by the positive signal at one of 4 mutation bands in the strip. The most frequent type was R5 (S53 IL) which were 17 cases (77.3%). Results of direct sequencing were identified the exact characteristics of 8 mutations which were not comfirmed by LiPA. S522W type point mutation and 9 base pair deletion at codon 513-515 were new identified mutations for the first time. CONCLUSION: Mutations in rpoB gene is the main mechanism of RMP resistance in M. tuberculosis and LiPA is a very useful diagnostic tool for the early diagnosis of RMP resistance in M. tuberculosis.
Base Pairing
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Codon
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DNA-Directed RNA Polymerases
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Drug Resistance, Multiple
;
Early Diagnosis
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Isoniazid
;
Mycobacterium tuberculosis
;
Point Mutation
;
Rifampin
;
RNA Polymerase I
;
Tuberculosis*
8.Neosensitization to Multiple Drugs Following Valproate-Induced Drug Reaction with Eosinophilia and Systemic Symptoms Syndrome.
Jae Min SONG ; Young Eun JUNG ; Joon Hyuk PARK ; Moon Doo KIM ; Min Seok CHEON ; Chang In LEE
Psychiatry Investigation 2017;14(4):518-520
Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS) syndrome is associated with severe skin eruptions, fever, hematological abnormalities, and multi-organ involvement. Although aromatic anticonvulsant drugs have been frequently associated with the manifestation of DRESS syndrome, its induction following treatment with nonaromatic anticonvulsants, such as valproate, has rarely been reported. Moreover, there are limited data regarding the development of neosensitization related to chemically unrelated drugs following an episode of DRESS syndrome. Here, a case of neosensitization to multiple drugs is described. The present case report describes a female patient who experienced neosensitization to amoxicillin, olanzapine, and quetiapine following the manifestation of DRESS syndrome induced by valproate.
Amoxicillin
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Anticonvulsants
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Drug Hypersensitivity Syndrome*
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Female
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Fever
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Humans
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Quetiapine Fumarate
;
Skin
;
Valproic Acid
9.Management of Post-lobectomy Bronchopleural: Cutaneous Fistula with a Rectus Abdominis Free Flap.
Chan Yeong HEO ; Kyung Hee MIN ; Seok Chan EUN ; Rong Min BAEK ; Sang Hoon CHEON
Journal of the Korean Society of Plastic and Reconstructive Surgeons 2009;36(6):795-798
PURPOSE: The repair of complex chest wall defects presents a challenging problem for the reconstructive surgeon. In particular, a free flap is often required when the defect is large, in which case suitable recipient vessels must be found to insure revascularization. The authors report a case of persistent bronchopleural-cutaneous fistula developed after undergoing lobectomy for lung cancer. METHODS: The defect area was repaired using a free vertical rectus abdominis muscle flap revascularized by microvascular anastomosis to the 6th intercostal pedicle. The flap obliterated the right chest cavity, closed the site of empyema drainage, and aided healing of a bronchopleuralcutaneous fistula. RESULTS: The patient has remained healed for 14 months without any postoperative complications or recurrent infection or fistula. CONCLUSION: We suggest that a rectus abdominis musculocutaneus free flap and intercostal pedicle as a recipient could be a useful method for repair of chest defects.
Cutaneous Fistula
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Drainage
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Empyema
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Fistula
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Free Tissue Flaps
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Humans
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Lung
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Muscles
;
Postoperative Complications
;
Rectus Abdominis
;
Thoracic Wall
;
Thorax
10.Clinical characteristics of and therapeutic approach to complications due to the injection of foreign material in the face: a retrospective study
Dong Seok SHIN ; Kyung Min SON ; Ji Seon CHEON ; Woo Young CHOI ; Min Hyub CHOI
Archives of Aesthetic Plastic Surgery 2022;28(2):53-60
Background:
Soft tissue fillers are increasingly used to rejuvenate and beautify the body and face. Unknown foreign materials that have not always been proven to be safe for human use have been used for injections in the past. Various commercial injectable materials have since been developed and are used; however, the number of complications has increased as soft tissue fillers have increased in use.
Methods:
A retrospective study of 39 patients with facial foreign body complications who underwent surgical treatment between March 2012 and February 2021 was conducted. Patient information was analyzed, and patient satisfaction was evaluated using a questionnaire after surgical treatment. A comparative statistical analysis was undertaken.
Results:
Patients who underwent procedures performed by unlicensed practitioners tended to be older at the time of presenting to the hospital (P=0.004). The degree of satisfaction after surgical repair was significantly lower following the direct approach than after the indirect approach using a bypass incision (P=0.044). The degree of satisfaction significantly decreased (P=0.001) as the number of operations the patient received increased.
Conclusions
When treating complications caused by foreign material injections, surgical removal is a more reliable method than treatment with medication or further injections; however, treatment decisions should be made thoughtfully, and many factors must be considered. Patient satisfaction can be improved by reducing the number of operations and making the appropriate corresponding incisions or excisions to treat the full range of symptoms caused by foreign substances and by indirectly using bypass incisions to mitigate post-surgery scars.