• 대한세포병리학회지
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• 제2권1호
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• pp.36-42
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• 1991

We report 4 cases of malignant thymoma which were composed of 2 cases of invasive thymoma and 2 cases of thymic carcinoma. The cytologic findings of invasive thymoma were similar to those of benign thymoma. The distinctive cytologic features of thymic carcinoma were necrotic background, irregular clusters and individually scattered arrangement of anaplastic epithelial cells, and some scattered mature small lymphocytes. These findings may be found in the Hodgkin's lymphoma, seminoma, and metastatic squamous ceil carcinoma, undifferentiated carcinoma, and large ceil carcinoma of the lung. But, the feature of irregular clustering of anaplastic epithelial cell haying scanty cytoplasm was different from Hodgkin's lymphoma and seminoma. Clinical and radiologic findings as well as cytologic finding were helpful in differential diagnosis of thymic carcinoma from metastatic carcinoma.

• Journal of Chest Surgery
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• 제27권4호
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• pp.303-309
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• 1994

Eighteen patients with thymoma have undergone surgical treatment at Pusan National university Hospital from 1983 to 1993. The mean age of the patients was 47.3$\pm$13.3 years old and male to female ratio was 1.6 : 1. Eleven of the patients[61.1%] with thymoma had myasthenia gravis; 12 cases[66.7%] were encapsulated and 6[33.3%] invasive. Operation was complete resection in 14[77.8%] of the patients, partial resection with residual tumor in 3[16.7%], and simple biopsy in one[5.5%]. Adjuvant radiotherapy was administered in 5 of 6 invasive thymoma. Postoperatively one patient died for excessive bleeding and sepsis. A tumor relapse was observed in one patient who had invasive thymoma and underwent partial resection followed by postoperative radiotherapy. The overall 5-year survival rate was 88.2$\pm$ 7. 9%.The presence of myasthenia gravis is not considered as an adverse factor for survival but it contributes to early discovery of associated thymoma.

• Tuberculosis and Respiratory Diseases
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• 제73권6호
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• pp.331-335
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• 2012

Thymomas are one of the most common neoplasms of the mediastinum derived from thymic epithelium. It is common that invasive thymoma invades the lung, pericardium, and great vessels. Airway compression by mass effect also occurs, but direct polypoid tumor growth into the airway is extremely rare. Only 20 cases of invasive thymoma with endobronchial polypoid growth have previously been reported globally. However, there is no case report of invasive thymoma with endotracheal growth. Herein, we report a rare case of invasive thymoma with endotracheal polypoid growth in a 28-year-old woman.

• Journal of Chest Surgery
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• 제28권3호
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• pp.303-307
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• 1995

We experenced 18 patients with surgically treated thymoma from January 1986 to December 1993. There were 13 male and 5 female ranged from 23 to 69 years of age. Among them Myasthenia gravis was present in 8 patients (44%) The predominant cell type was lymphocytic(11 patients), followed by epithelial (3) and mixed (4), and had no value in predicting prognosis. Treatment consisted of complete resection in 15 patients, partial resection in 2 patients and 1 patient was performed biopsy. Only, and then adjuvant radiation therapy was done in 7 patients and 3 patients needed adjuvant chemotherapy. Invasion of the adjacent tissue in thymoma was the most improtant prognostic value. There were 6 non-invasive tumors and 12 invasive tumors. Two patients with invasive thymomas resulted in death and one of 6 patients with non-invasive thymomas died during follow up ranged from 25 day to 60 months. The causes of death were myasthenic crisis in 1 patient, C. N. S. problem in 1 patient and pulmonary & mediastinal metastasis in 1 patient.

• Tuberculosis and Respiratory Diseases
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• 제70권1호
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• pp.74-78
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• 2011

Herein, we report a case of recurrent pleural metastasis after complete resection of invasive thymoma that was successfully treated with surgical resection. Thymoma and thymic carcinoma are uncommon neoplasms derived from the epithelial cells of the thymus. Approximately 30% to 50% of thymomas are asymptomatic at the time of diagnosis. However, these cancers may present with constitutional or local pressure symptoms and sometimes with paraneoplastic syndromes, especially myasthenia gravis. Surgical resection is the mainstay of thymoma treatment and has been shown to remarkably improve long-term survival. Despite complete resection, local recurrences are frequent, and surgery is the cornerstone of therapy even in cases of recurrent thymoma. We experienced a 67-year-old male patient with pleural metastasis that developed 6 years after complete surgical resection of invasive thymoma. The pleural mass was excised by video-assisted thoracoscopic surgery. Histopathological examination revealed an invasive World Health Organization (WHO) type B2 thymoma.

• 대한세포병리학회지
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• 제11권1호
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• pp.41-45
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• 2000

Thymoma is the most common anterior mediastinal tumor in adults. Rarely, it is presented as the anterior neck mass, commonly located in the anterolateral aspect of the neck or adjacent to the thyroid. We experienced two cases of fine needle aspiration cytology of thymoma, mimicking thyroid mass. The first case was an ectopoic cervical thymoma in a 31-year-old female. The fine needle aspiration cytology was misinterpreted as reactive hyperplasia of lymph node. But the histologic diagnosis was thymoma, predominantly lymphocytic type. The second case was an invasive thymoma in a 66-year-old female, who complained a large anterior neck mass. The fine needle aspiration cytology revealed biphasic population of some clusters of epithelial cells and scattered lymphocytes. The cytologic diagnosis was thymoma and was confirmed as invasive thymoma after the biopsy. Therefore, when the cytologic feature of anterior neck mass shows the both lymphocyte and epithelial component, the differential diagnosis should Include the possibility of thymoma.

• 대한두경부종양학회지
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• 제19권1호
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• pp.75-79
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• 2003

Ectopic cervical thymic tumor, first described in 1941 by Boman, is a rare tumor of the neck displaying the same histologic features as mediastinal thymoma. It was classified into benign thymoma, invasive (or malignant) thymoma, thymic carcinoma histopathologically and clinically. The ectopic cervical thymic tumor is misdianosed as the thyroidal mass on radiologic examination and FNA cytology due to its rarity and unusual location. Recently, we have experienced two cases of ectopic cervical thymic tumor misdiagnosed as thyroid mass ; a case of thymic carcinoma;the other of invasive thymoma. So, we report these cases with review of the literature.

• Journal of Chest Surgery
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• 제29권12호
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• pp.1381-1384
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• 1996

42세 남자는 약 10년간 석면에 노출되는 직업에 종사하다가 그만둔지 5년 후, 진행하는 호흡곤란을 주소로 검사를 받던중 우측 늑막에 다양한 크기의 종괴를 보이는 암종으로 입원하였다. 환자는 부분 마취하에 늑막 조직 생검을 받고 침윤성 흉선종의 의심하에 우 전늑막 및 우전폐 절제술을 받았다. 수술중 흉선의 상태는 정상이었으며 폐 첨부로부터 횡격막부위까지의 늑막과 폐엽간, 부분적인 폐 침습을 보이고 심낭의 침윤을 보이는 Masaoka 분류 Stage 로 보이는 침윤성 흉선종으로 진단되 었다. 환자는 술후 600의 방사선 조사를받고 술후 8개월인 현재까지 재발의 징후 없이 경과관찰중이다.

• 대한세포병리학회지
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• 제4권1호
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• pp.16-24
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• 1993

The fine needle aspiration (FNA) cytologic findings in 16 cases of histologically confirmed thymoma are reported. The aspirates were obtained under fluoroscopic guidance. The cytologic diagnoses were inadequate sample in one case, thymoma in 12(75%), small cell carcinoma or thymoma in 1, benign mesenchymal tumor in 1, and germ cell tumor in one. The cytologic features were detailed according to the constituent epithelial cell type, and into 4 small of epithelial cells and lymphocytes. Fifteen cases were classified into 4 small epithelial cell type, 6 intermediate epithelial cell type, 1 large epithelial cell type, 1 large pleomorphic epithelial cell type, and 3 spindle-shaped epithelial ceil type. Cytologic differential diagnosis was discussed, and the important criteria for the cytologic diagnosis of thymoma were reviewed. This review leads us to think that nonoperative cytologic approaches in the diagnosis of the thymoma are possible, and that correct cytologic diagnosis of thymoma with FNAs can easily be made, if adequate samples are obtained However the invasiveness and histologic type could not be predicted by cytological features only. Knowing various cytologic and histologic features of thymoma will be helpful for the diagnosis of thymoma and the differential diagnosis of modiastinal tumors.

• Journal of Chest Surgery
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• 제30권1호
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• pp.61-66
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• 1997

1986년 1월부터 1995년 12월까지 24예의 흉선종에 대한 수술적 치료를 시행하였다. 대상환자들은 남자 17명, 여자 7명이었으며, 연령은 23세 에서 69세 사이였다. 중증근무력증은 14예에서 동반되 있다. 조직학적 분류로 임파구성 12예,흔합형 8예,상피세포형 4예를 보였고, 병기학적 분류로 I기 11예, II기 4 예, III기 8예였고 VI기는 1예 있었다. 11예의 비침윤형은 모두 외과적 절제를 하였고, 침윤형 13예중 10예에서 완전절제가 가능하였고, 나머지 3예는 부분절제 또는 조직생검후 방사선치료 및 항암화학요법을 시행하였다. 25일에서 60개월의 추적 조사기간중 사망이 3예 있었고, 경과의 호전 4예, 재발 2예 및 15예의 완쾌를 관찰하였다. 근무력증을 동반한 흉선종 환자 14예중 1예가 근무력위기로 사망하였고, 2예가 증상악화, 6예가 약 용량을 감소 또는 복용을 중지하였으며 5예는 술전과 비슷한 용량의 약물치료가 필요하였다