• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제39권5호
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• pp.224-230
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• 2013

Objectives: Papilloma frequently develops as a benign tumor of the head and neck area, but its potential for malignant transformation has yet to be studied. This study aims to provide basic information for papillomas using the immunohistochemical staining of matrix metalloproteinase 2 (MMP-2) and human papilloma virus (HPV) 16 and 18. Materials and Methods: To evaluate the malignant transformation of papillomas, the selected tissue samples were serially diagnosed with pre-cancerous papilloma (with epithelial dysplasia, pseudo-epitheliomatous hyperplasia) or malignant lesion (squamous cell carcinoma, SCC) after the first diagnosis (squamous papilloma, inverted papilloma). The selected tissues were stained with an antibody to MMP-2 and HPV 16-E7, HPV 18-L1. A statistical analysis was performed according to each transformation step. Results: The epithelial layer of papilloma and pre-cancerous papilloma lesions had a similar MMP-2 expression, but that of the malignant lesion had a significantly increased MMP-2 expression. HPV 16 and 18 infection rates were 28.6%, 33.3% and 63.6% in papillomas, pre-cancerous papilloma lesions, and SCC. Conclusions: A relatively high MMP-2 expression and HPV 16 or 18 infection of papillomas may be associated with early events in the multistep processes of malignant transformation of papillomas.

• Journal of Korean Neurosurgical Society
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• 제57권3호
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• pp.211-214
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• 2015

Ganglioneuromas are benign tumors. Surgical excision is the treatment of choice with very good prognosis. However, neuroblastomatous malignant transformation of ganglioneuromas was previously reported. We report a patient with spinal neuroblastoma recurrent from a ganglioneuroblastoma after disease free survival of 13 years. This is one of the rare examples of spinal neuroblastoma and to our knowledge the second case report with malignant transformation from a ganglioneuroblastoma or a ganglioneuroma. The present case is the only report in the literature with further genetic investigations.

• Journal of Chest Surgery
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• 제50권1호
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• pp.59-63
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• 2017

Pulmonary benign metastasizing leiomyoma (PBML) is defined as metastasis of a leiomyoma to lung tissue. It was first reported in 193 7. PBML is known as a benign disease, but can undergo malignant transformation. Only 1 case of the malignant transformation of PBML to leiomyosarcoma has been reported previously. In this report, we present a case of malignant transformation of PBML.

• Journal of Korean Neurosurgical Society
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• 제30권7호
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• pp.855-860
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• 2001

Introduction : It has been reported that the survival of low-grade glioma patients depends upon the time of malignant transformation. The authors presents the clinical analysis of histologically proven trasformed gliomas. Materials and Method : A total 92 patients who were consecutively treated and histologically confirmed hemispheric low-grade gliomas between 1980 and 1998 were analyzed and followed. All cases meet the criteria of WHO glioma classification of grade II. Results : The mean follow-up period was 73 months. Twenty two among 92 cases(24%) were histologically proven to be transformed into malignant ones. The mean time to transformation was 56 months. The 5-year and 10-year survival rates of the transformed group were 66% and 30% respectively and significantly different from the survival rates of the non-transformed group(p=0.0018). Among clinical factors at presentation, the initial tumor volume had a tendency to be larger in the transformed group than that of the non-transformed group and became significant when it was divided into more than $30cm^3$ or not(p=0.02). Among therapeutic factors, the extent of removal had no influence on the rate of malignant transformation. But postoperative radiation therapy were more frequently given to the pre-transformed group than the non-transformed group and the frequency was significantly different(p=0.02). Conclusions : The authors had found that the initial tumor volume and radiation therapy could be clinical prognostic factors for the malignant transformation of low-grade gliomas.

• 대한후두음성언어의학회지
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• 제28권2호
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• pp.144-147
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• 2017

Laryngeal neoplasm is the second most common malignancy of the upper aerodigestive tract. About 85% to 95% of laryngeal malignancies are squamous cell carcinoma that arises from the epithelial lining of the larynx. The exact cause of laryngeal neoplasm is unknown, but certain risk factors can affect the chances of developing it. Chronic inflammation is a mutagen factor confirmed in the carcinogenesis of various tumor. Inhalation injuries cause histopathologic damage to laryngeal mucosa and inflammation change. This long term inflammation may leads to the development of dysplasia and malignant transformation. Recently, we experienced a case of malignant transformation of laryngeal mucosa after inhalation injury patient 25 years ago. Herein, we reported this rare case and review the relevant literature.

• 대한골관절종양학회지
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• 제15권1호
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• pp.87-91
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• 2009

섬유성 골 이형성증(fibrous dysplasia)은 한 개 또는 수개의 골조직이 섬유성 조직으로 대치되는 양성 골 질환으로 발생학적 장애로 일어나는 양성 골 질환으로 분류된다. 악성 전환(malignant transformation)은 매우 드문 경우로 다발성 섬유성 골 이형성증에서 단발성 섬유성 골 이형성증보다 더 호발하는 것으로 알려져 있다. 저자들은 57세 남자 환자에서 대퇴골 근위부에 병적 골절 및 내반고 변형을 동반한 다발성 섬유성 골 이형증에 대하여 소파술, 절골술, 내고정술 및 골 이식술을 시행 후, 2년 5개월 만에 골육종(osteosarcoma)으로 악성 전환된 증례를 경험하였기에 문헌고찰과 함께 보고하는 바이다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권3호
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• pp.1165-1168
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• 2015

Objective: To investigate the incidence of malignant transformation and P53 and P16 expression in teratomatous skin of ovarian mature cystic teratoma. Materials and Methods: Data on ovarian teratoma specimens in nearly 10 years were reviewed. P53 and P16 expression were detected by immunohistochemistry in 25 cases of teratomatous skin of ovarian mature cystic teratoma, 20 cases of squamous cell carcinoma and 2 cases of squamous cell carcinoma originated from teratomatous skin. Results: Of 1913 cases of ovarian mature cystic teratoma in nearly 10 years, only two cases of squamous cell carcinoma were found in teratomatous skin, with malignant transformation rate of 0.1045%. P53 expression was detected in 2 cases squamous cell carcinoma originated from teratomatous skin and P16 overexpression in one. There were no expressions of P53 and P16 in 25 cases of teratomatous skin of ovarian mature cystic teratoma. Of 20 cases of squamous cell carcinoma P53 overexpression (positive rate of 55%) was detected in 11 cases, P16 overexpression (positive rate of 35%) in 7 cases. The positive rates of P53 and P16 expression in squamous cell carcinomas were significantly higher than that in the teratomatous skins (p< 0.001, p= 0.002). Conclusions: There was low risk of malignant transformation in teratomatous skin of ovarian mature cystic teratoma which can be explained by lower P53 and P16 expressionin teratomas than that in squamous cell carcinoma.

• 대한두경부종양학회지
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• 제6권1호
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• pp.24-28
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• 1990

It is well known that laryngeal papilloma has a tendency for malignant transformation, but the incidence was variable among many authors. The authors present a case of laryngeal cancer which was considered to be transformed from laryngeal papilloma after six years follow up, with serial pathological review of the specimen. Incidence of malignant transformation in our hospital is 2.5% of total laryngeal papilloma and it is the only case among 57 laryngeal cancer for 6 years duration. It must be stressed that long term follow up is recommanded in adult type laryngeal papilloma.

• Clinical and Experimental Reproductive Medicine
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• 제46권3호
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• pp.140-145
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• 2019

Malignant transformation of ovarian mature cystic teratomas is rare, and papillary thyroid cancer occurs in 0.1%-0.3% of ovarian teratomas that undergo malignant transformation. We describe a case of successful in vitro fertilization pregnancy and delivery after a fertility-sparing laparoscopic operation in a patient with papillary thyroid carcinoma arising from a mature cystic teratoma.

• 대한골관절종양학회지
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• 제18권1호
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• pp.14-19
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• 2012

목적: 저자들은 골육종으로 악성 변화한 거대 세포종 환자의 종양학적 결과에 대해 알아보고자 하였다. 대상 및 방법: 2000년 1월부터 2012년 2월까지 외부에서 양성 거대 세포종으로 진단받은 뒤 치료받고 재발한 후 악성 변화가 의심되어 본원으로 전원된 5명의 환자를 대상으로 하였다. 5명 환자 모두 방사선 치료를 시행받은 병력은 없었다. 결과: 모든 환자는 광범위 절제술 시행받았고, 술 후 조직병리 검사상 골육종으로 확진되었다. 원발성 병변은 원위 대퇴골 3명, 근위 대퇴골 1명, 원위 요골 1명이었다. 양성 거대 세포종으로 진단받고 악성 변화하기까지 기간은 평균 49.2개월(24-126개월)이었다. 평균 추시 기간은 21.6개월이었다. 본원에서 광범위 절제술을 시행 받았음에도 3명에서 원격 전이가 발생하였고, 이들 중 2명의 환자에서는 국소 재발도 확인되었다. 이들 3명 모두 사망하였다. 결론: 본 증례로 보아 적절한 치료를 받은 양성 거대 세포종 환자에서도 악성 변화는 5년 이내에 발생할 수 있다. 따라서, 정기적 추시 중 방사선학적으로 육종 변화가 의심되는 경우 보다 적극적인 치료가 필요하다고 생각된다.