• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.05a
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• pp.279-282
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• 2022

Acute lymphoblastic leukemia is an acute leukemia caused by suppression of bone marrow function due to overgrowth of immature lymphocytes in the bone marrow. It accounts for 30% of acute leukemia in adults, and children show a cure rate of over 80% with chemotherapy, while adults show a low survival rate of 20% to 50%. However, research on a machine learning algorithm based on medical image data for the diagnosis of acute lymphoblastic leukemia is in the initial stage. In this paper, we compare and analyze CNN algorithm models for quick and accurate diagnosis. Using four models, an experimental environment for comparative analysis of acute lymphoblastic leukemia diagnostic models was established, and the algorithm with the best accuracy was selected for the given medical image data. According to the experimental results, among the four CNN models, the InceptionV3 model showed the best performance with an accuracy of 98.9%.

• The Journal of Korea Assosiation for Disability and Oral Health
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• v.7 no.2
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• pp.103-106
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• 2011

다운 증후군(Down syndrome, Trisomy 21)은 가장 흔하게 나타나는 증후군으로 대략 1/1000의 확률로 태어난다. 세 개의 유전적 유형이 있지만, 95% 정도가 3개의 21번 염색체를 갖는 비분리 염색체 유형이다. 주된 구강 증상으로는 거대설, 균열설, 과잉치, 결손치, 왜소치, 유치와 영구치의 맹출지연 그리고 이에 따른 부정교합 등이 있다. 75%의 환자에서는 어린 나이에 치주질환에 이환되기 쉬우며, 치아우식증에는 낮은 이환율을 보인다는 보고가 있다. 급성 림프구성 백혈병(Acute Lymphoblastic Leukemia)은 주로 어린이에서 나타나며, 특히 다운 증후군 환자에서의 발병율은 정상인에 비해 20배 높다. 치은비대와 출혈의 양상이 주로 나타나며, 간혹 상악골과 구개골에 종괴가 관찰 되기도 한다. 본 증례에서는 서울대학교치과병원 소아치과에 내원한 환자 중 급성림프구성 백혈병을 앓고 있는 다운 증후군 환아가 있어 이를 보고하고자 한다.

• Journal of Yeungnam Medical Science
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• v.9 no.1
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• pp.10-22
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• 1992

• Childhood Kidney Diseases
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• v.13 no.2
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• pp.278-281
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• 2009

Bilateral renal enlargement is a very rare manifestation as the primary presenting feature of acute lymphoblastic leukemia. We are reporting an unusual clinical picture of a 9-month-old male patient diagnosed as precusor B-cell lymphoblastic leukemia, who showed bilateral nephromegaly without any hepatosplenomegaly at the time of initial presentation.

• Clinical and Experimental Pediatrics
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• v.53 no.2
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• pp.253-257
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• 2010

Hemolytic uremic syndrome (HUS) is the most common cause of acute renal failure in children younger than 4 years and is characterized by microangiopathic hemolytic anemia, acute renal failure, and thrombocytopenia. HUS associated with diarrheal prodrome is usually caused by Shiga toxin-producing Escherichia coli O157:H7 or by Shigella dysenteriae, which generally has a better outcome. However, atypical cases show a tendency to relapse with a poorer prognosis. HUS has been reported to be associated with acute lymphoblastic leukemia (ALL) in children. The characteristics and the mechanisms underlying this condition are largely unknown. In this study, we describe the case of an 11-year-old boy in whom the diagnosis of ALL was preceded by the diagnosis of atypical HUS. Thus, patients with atypical HUS should be diagnosed for the possibility of developing ALL.

• Journal of Veterinary Clinics
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• v.19 no.4
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• pp.429-432
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• 2002

Chronic Iymphocytic leukemia is a general disease that evolves over a longer duration and is characterized by more mature and well-differentiated Iymphocytes in blood and bone marrow than those seen in acute leukemia. This report presents a 2-year-old mix neutered male dog with seizure, ascites, and transmissible venereal tumor. Diagnostic works-up concluded chronic Iymphocytic leukemia. Chemotherapy composed of chlorambucil and prednisolone has been applied to the patient until now. Remission of almost manifestations was achieved, and the quality of life improved.

• Clinical and Experimental Pediatrics
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• v.51 no.1
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• pp.73-77
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• 2008

Purpose : p16 gene, mapped to the 9p21 chromosomal region, has emerged as a candidate tumor suppressor gene in human neoplasm. It is an inhibitor of cyclin-dependent kinase and inhibits Rb phosphorylation. In a variety of tumors including childhood acute lymphoblastic leukemia (ALL), deletion and/or mutation of the p16 gene has been found. Despite their high frequency, the prognostic importance of p16 alterations is still controversial in ALL and has been reported to be either unfavorable or similar to that of other patients. We studied the correlation between loss of p16 protein confirmed by immunohistochemical staining and clinical outcomes of patients diagnosed as ALL. Methods : We performed an immunohistochemical staining for p16 protein in 74 cases of bone marrow biopsy slide initially diagnosed as ALL between January 1998 and December 2006. We reviewed the clinical manifestations, laboratory findings, treatment outcomes retrospectively. Results : Of 74 slides, 12 were negative for p16 protein. Seven were males and 5 were females with a median age at diagnosis was 5.8 (1.3-18.8) years. Initial WBC were 17,225 $(500-403,300)/{\mu}L$. By immunologic surface marker analysis, 7 patients were early pre-B CALLA (+) and 5 patients were T-cell ALL. Two patients of intermediate risk group had relapsed and died. Three patients had family history of breast cancer. Four patients died and overall survival rates were $53.5{\pm}18.7%$. Conclusion : Loss of p16 protein is supposed to be an independent risk factor of childhood ALL associated with poor outcomes. In clinical setting, the clinician must take into account p16 status, not only at the genomic but also at the protein level. Further clinical experience on thoroughly investigated cases will help a better understanding between p16 status and clinical outcomes.

• Clinical and Experimental Pediatrics
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• v.46 no.12
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• pp.1260-1265
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• 2003

Purpose : In 1970, the Berlin-Frankfurt-Munster(BFM) group introduced an intensification therapy after remission induction to reduce relapse of acute lymphoblastic leukemia(ALL) in childhood. Delayed intensification(DI) phase has been included for treatment of ALL in our hospital since the mid-1990s. The purpose of this study is to evaluate the outcome with vs. without DI phase and the outcome with two vs. one DI phase for intermediate risk patients. Methods : One hundred and thirty nine children with ALL who were treated at the Department of Pediatrics of Wonju Christian Hospital and Yonsei University Medical Center between March, 1990 and July, 2002 were analysed retrospectively. Results : Thirty-eight patients were treated with a DI phase, and 101 patients were treated without a DI phase. Among the DI patients, seven patients were treated with a double DI phase. Five-year overall survival(OS) in the low, intermediate, and high risk groups were 68%, 66% and 58%, respectively. 5-year OS in DDI, DI, and control were 95%, 86% and 40%, respectively. In the low risk group, 5-year event free survival(EFS) in DI, and control were 94% and 58%, respectively. Conclusion : Delayed intensification improved EFS on childhood ALL in all risk groups.

• Clinical and Experimental Pediatrics
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• v.46 no.10
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• pp.972-976
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• 2003

Purpose : For the control of childhood leukemia, of which the mortality is still high, the basic data for the incidence has a great importance. The authors analyzed the data from 133 new patients with childhood leukemia between 1996-2000 in Busan, Korea. Methods : The data were obtained from 133 new cases(87 males and 46 females from 0 to 15 years old) of childhood leukemia who were residents of Busan and who were admitted to the 4 university hospitals and 11 general hospitals from 1996 to 2000. Results : The total number of the new childhood leukemia patients was 133 between 1996-2000; the average annual number of new patients was 26.6. The age-and-sex adjusted annual incidence rate (/100,000) was in the range of 2.37-4.53(male 2.47-5.29, female 0.76-3.36) with an average of 3.29 (male 4.05, female 2.43). Age-specific annual incidence rate(/100,000) was 3.78 in the 0-4 year age group, 3.51 in the 5-9 year age group and 3.08 in the 10-14 year age group. Of the major types of childhood leukemia, the distribution of ALL was average 71.4%, of AML 23.3%, and of CML 4.5%. Of the major types of leukemia by age range, ALL showed highest in the 5-9 year age group, while AML in 0-4 and 10-14 year age groups. Sex-ratio(male to female) of major type of leukemia was 1.97 : 1 and 1.21 : 1, in ALL and AML groups, respectively, while all were male in CML. Conclusion : The average age-and-sex adjusted annual incidence rate(/100,000) of childhood leukemia in Busan from 1996 to 2000 was 3.29. Compared to data in related articles, this data suggests a steady increase in the incidence of childhood leukemia in the Busan area over the last 20 years since 1981.

• 대한임상약리학회:학술대회논문집
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• 1995.12a
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• pp.39-39
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• 1995