• Asian Pacific Journal of Cancer Prevention
• /
• 제15권21호
• /
• pp.9487-9494
• /
• 2014

Background: The size of a hepatic neoplasm is critical for staging, prognosis and selection of appropriate treatment. Our study aimed to compare the radiological size of solid hepatocellular carcinoma (HCC) masses on magnetic resonance imaging (MRI) with the pathological size in a Chinese population, and to elucidate discrepancies. Materials and Methods: A total of 178 consecutive patients diagnosed with HCC who underwent curative hepatic resection after enhanced MRI between July 2010 and October 2013 were retrospectively identified and analyzed. Pathological data of the whole removed tumors wereassessed and differences between radiological and pathological tumor size were identified. All patients were restaged using a modified Tumor-Node-Metastasis (TNM) staging system postoperatively according to the maximum diameter alteration. The lesions were classified as hypo-staged, iso-staged or hyper-staged for qualitative assessment. In the quantitative analysis, the relative pre and postoperative tumor size contrast ratio ($%{\Delta}size$) was also computed according to size intervals. In addition, the relationship between radiological and pathological tumor diameter variation and histologic grade was analyzed. Results: Pathological examination showed 85 (47.8%) patients were overestimated, 82 (46.1%) patients underestimated, while accurate measurement by MRI was found in 11 (6.2%) patients. Among the total subjects, 14 (7.9%) patients were hypo-staged and 15 (8.4%) were hyper-staged post-operatively. Accuracy of MRI for calculation and characterized staging was related to the lesion size, ranging from 83.1% to 87.4% (<2cm to ${\geq}5cm$, p=0.328) and from 62.5% to 89.1% (cT1 to cT4, p=0.006), respectively. Overall, MRI misjudged pathological size by 6.0 mm (p=0.588 ), and the greatest difference was observed in tumors <2cm (3.6 mm, $%{\Delta}size=16.9%$, p=0.028). No statistically significant difference was observed for moderately differentiated HCC (5.5mm, p=0.781). However, for well differentiated and poorly differentiated cases, radiographic tumor maximum diameter was significantly larger than the pathological maximum diameter by 3.15 mm and underestimated by 4.51 mm, respectively (p=0.034 and 0.020). Conclusions: A preoperative HCC tumor size measurement using MRI can provide relatively acceptable accuracy but may give rise to discrepancy in tumors in a certain size range or histologic grade. In pathological well differentiated subjects, the pathological tumor size was significantly overestimated, but underestimated in poorly differentiated HCC. The difference between radiological and pathological tumor size was greatest for tumors <2 cm. For some HCC patients, the size difference may have implications for the decision of resection, transplantation, ablation, or arterially directed therapy, and should be considered in staging or selecting the appropriate treatment tactics.

• 대한수의학회지
• /
• 제33권4호
• /
• pp.753-756
• /
• 1993

Clinical and pathohistological findings in 16 cattle with mesotheliosis were described : pearshaped abdominal outline, poor nutritional and growth condition, reduced milk yield, diarrhea, apathy, increased peritoneal fluid, dyspnea, multiple tumors to the visceral serosa of abdominal intestine, and papilliform growth of mesotheliomas. Asbestos plays an etiologic role in bovine mesotheliosis. A proposal is made to use bovine mesotheliosis as a screening monitor for the protection of man.

• Asian Pacific Journal of Cancer Prevention
• /
• 제13권8호
• /
• pp.3627-3630
• /
• 2012

The epithelial cell adhesion molecule (EpCAM) is a pan-epithelial differentiation antigen that is expressed on almost all carcinomas. However, a role in rat liver carcinogenesis has never been reported previously. Thus, its expression was investigated herein in rat liver tumors induced by diethylnitrosamine (DEN). Twenty male 5-week-old F344 rats were used in this experiment. Mini-osmotic pumps containing doses of 47.5 mg of DEN were inserted into the abdominal cavity of each animal to initiate liver carcinogenesis. All animals were sacrificed at 26 weeks after DEN treatment. At necropsy, hepatic masses were processed for histopathological examination, which revealed forty-four hepatocellular adenomas (HCAs) and twenty hepatocellular carcinomas (HCC). Tumors were immunohistochemically analyzed for EpCAM, proliferating cell nuclear antigen (PCNA) and co-localization of the two. EpCAM expression was mainly detected in hepatic tumor cells, showing a cytoplasmic staining pattern. However, expression was also slightly observed in normally-appearing surrounding hepatic cells. PCNA expression was highly detected in tumor cells, showing nuclear staining. Double staining of EpCAM and PCNA in tumors showed many cells with co-localization. Taken together, EpCAM and PCNA expression were increased in DEN-induced tumors and many tumor cells showed co-expression. It is suggested that EpCAM may increase during DEN-induced tumors, possibly associated with cell proliferation.

• Tuberculosis and Respiratory Diseases
• /
• 제78권3호
• /
• pp.267-271
• /
• 2015

Desmoid tumors are rare soft tissue tumors considered to have locally infiltrative features without distant metastasis until now. Although they are most commonly intraabdominal, very few cases have extra-abdominal locations. The origin of intrathoracic desmoid tumors is predominantly the chest wall with occasional involvement of pleura. True intrathoracic primary desmoid tumors with no involvement of the chest wall or pleura are extremely rare. We recently experienced a case of true intrathoracic desmoid tumor presenting as multiple lung nodules at 13 years after resection of a previous intraabdominal desmoid tumor.

• Advances in pediatric surgery
• /
• 제16권1호
• /
• pp.11-17
• /
• 2010

Pancreatic tumors in children are relatively rare, and their prognosis differs from that in adults. The purpose of this study is to examine the clinical characteristics, treatment, and prognosis for children with pancreatic tumors. We retrospectively reviewed the medical records of children under 15 years of age with pancreatic tumors who were treated surgically at Asan Medical Center between January 1992 and November 2009. There were 16 patients, fourteen of whom were pathologically diagnosed with solid pseudopapillary tumor. The other two patients were diagnosed with pancreatoblastoma and acinar cell carcinoma, respectively. Six patients of the 16 patients (38 %) were male, and there was a male-to-female ratio of 1:1.6. The initial presentations were upper abdominal pain in eight patients (50 %), palpable abdominal mass in three, and vomiting in one. Four patients were diagnosed incidentally. Six patients' tumors were located in the pancreatic head, six in the pancreatic body, and four in the pancreatic tail, respectively. The surgical procedures performed included distal pancreatectomy (n=7, 44 %), median segmentectomy (n=3), enucleation (n=3), pancreaticoduodenectomy (n=2), and pylorus-preserving pancreaticoduodenectomy (n=1). Three patients underwent laparoscopic surgery. The median tumor size was 6.5 cm (1.8~20 cm). Early surgical complications included pancreatic fistula (n=4), bile leakage (n=1), and delayed gastric emptying (n=1). A late complication in one patient was diabetes. The median follow-up period was five years and four months, and all patients survived without recurrence. While pancreatic tumors in adults have a poor prognosis, pancreatic tumors of childhood are usually curative with complete resection and thus have a favorable prognosis.

• Journal of Chest Surgery
• /
• 제36권8호
• /
• pp.619-622
• /
• 2003

위장관 간질종양(Gastrointestinal stromal turners, GIST)은 매우 드문 질환이다. 대개 위나 소장에서 발생하는 것으로 되어 있으나, 식도에서의 생기는 경우는 흔하지 않다. 위장관 간질종양은 위장관에서 발생하며 다양한 형태학적 소견을 보일 수 있으며, 기원이 분명치 않은 종양으로 알려져 왔다 저자들은 66세 여자의 하부 식도에서 발생한 악성 위장관 간질종양 1예를 경험하였기에 문헌 고찰과 함께 보고하고자 한다.

• Journal of Yeungnam Medical Science
• /
• 제34권1호
• /
• pp.132-136
• /
• 2017

Leiomyosarcoma (LMS) of the small intestine is a rare tumor, accounting for about 1% of all malignant mesenchymal lesions in the gastrointestinal tract. Since small bowel tumors are initially asymptomatic and nonspecific, delayed diagnosis and treatment are common. We found that a 44-year-old male patient who came in for lower abdominal pain had partial obstruction in the small bowel. Multiple ascites and ileal tumors involving peritoneal seeding were observed from his abdominal computed tomography. He was diagnosed as epithelioid LMS involving peritoneal transition after surgical resection, and the outpatient department has planned for a conservative therapy with observation. To the best of our knowledge, ileal epithelioid LMS accompanying a huge omental mass, with a size of 18 cm in dimension, and peritoneal seeding has not yet been reported in Korea. We report this rare case with literature review.

• Journal of Chest Surgery
• /
• 제29권11호
• /
• pp.1248-1256
• /
• 1996

원자력병원에서는 1987년 6월부터 1994년 12월까지 식도암으로 수술받은 372명중 병리학적으로 원격 복부 림파절의 전이가 확인된 병기 IV(M1LYN) 48명(12.9%)의 기록을 분석하였다. 원발 종양의 위치는 주로 하흉부 식도이었고, 전이된 림프절의 위치는 복강 동맥(n=45),총간 동맥(n=4), 대동맥 주위(n=1), 췌장하(n=1) 이었다. 대부분의 종양은 T3, T4(n=43)이고 국소 림프절 전이 (n=41)가 있었으나, T1, T2 종양(n=5)와 국소 림프절 전이없이 원격 림프절에 전이한 경우(n=7)도 일부있었다. 절제률과 완전 절제률은 각각 87.5%, 64.6%이었다. 절제 불가능과 불완전 절제의 원인의 대부분은 절제 불가능한 T4 병소(n=8), 림프절 막외 침습(n=7)이었으며, 전체 수술 사망률과 유병률은 각각 4.2%, 22.9%이었고, 절제 사망률은 4.8%이었다. 27명에서 수술후 보조 치료를 병행하였으며, 수술후 모든 생존 환자에서 추적이 가능하였다(추적 중앙값, 32개월). 수술 사망을 포함하여 식도암의 절제를 받은 환자(n=42)의 I년, 3년 생존률은 각각 54.0%, 18.1%(중앙값, 386일)이었다. 이상의 결과로, 원격 복부 림프절의 전이를 동반한 식도암은 수술의 사망률과 유병률이 높지 않으며, 수술을 받지 않은 환자의 예후가 극히 나쁘므로 잘 선택된 환자에서는 원격장기로 전이된 환자에 비하여 절제술의 역할이 인정된다. 그러나 수술만으로는 장기 성적이 좋지 않으므로 항암제 치료나 방사선 치료 등의 복합 치료에 대한 연구가 필요하다고 생각한다.

• Advances in pediatric surgery
• /
• 제1권2호
• /
• pp.115-121
• /
• 1995

We reviewed 45 cases of ovarian tumors treated at Seoul National University Children's Hospital from 1983 to 1993. Forty-five patients were operated upon for 52 ovarian tumors. The most common pathologic diagnosis was mature teratoma. The next were functional cyst, the tumors of epithelial cell origin, and those of stromal origin in order of frequency. Six patients(13%) had malignant tumor. There were one malignant teratoma, two dysgerminomas, one endodermal sinus tumor, and two granulosa cell tumors. Four cases were diagnosed as torsion of ovarian cyst preoperatively, and emergency exploratory laparotomy were performed. There were three cases of ovarian tumors associated with precocious puberty. The most widely used diagnostic tool was ultrasonography. In the treatment of these 45 patients, unilateral oophorectomy was done in 38 cases, unilateral oophorectomy with wedge resection of contralateral ovary was done in 5 cases, unilateral oophorectomy with contralateral simple cystectomy was done in one case and total abdominal hysterectomy with bilateral salpingooophorectomy was done in one case. Of the six cases of malignancy, five patients are alive 2 to 6 years after operation and one case was lost to be followed up.

• 한국임상수의학회지
• /
• 제22권3호
• /
• pp.271-274
• /
• 2005

Three dogs that had a history of abdominal distension were referred to the hospital. All were female with unilateral involvement. History and clinical signs were nonspecific. Abdominal radiographs demonstrated that the abdomen of all cases was filled with large masses. At laparotomy, all masses were kidney tumors with invasion around tissue. The tumors were soft, irregular, creamish and confined within the capsule. One case had liver metastasis. Another case was found to have adrenal gland metastasis. One case had caudal vena cava invasion. A ureteronephrectomy was performed unilaterally in all cases. In the microscopic appearances, all the tumors had malignant features with nuclear pleomorphism and amount of necrosis. Three cases were diagnosed as renal carcinomas.