Retroperitoneal Giant Liposarcoma

한현호,최경화,김동석,정우진,양승철,장선정,최준정,한웅규 대한비뇨의학회 2010 Investigative and Clinical Urology Vol.51 No.8

Retroperitoneal liposarcoma is an infrequent, locally aggressive malignancy. We report two cases of huge retroperitoneal liposarcomas. The presence of a palpable abdominal mass was a common symptom of the two patients. Preoperative imaging study showed huge retroperitoneal tumors. Both patients underwent complete surgical resections, and a negative microscopic margin was achieved in both cases. The histopathologic diagnosis was a well-differentiated retroperitoneal liposarcoma. Neither of the two patients developed a recurring tumor during the 1.5 years of follow-up.

Computed Tomography Manifestations of Histologic Subtypes of Retroperitoneal Liposarcoma

Lu, Jing,Qin, Qin,Zhan, Liang-Liang,Yang, Xi,Xu, Qing,Yu, Jing,Dou, Li-Na,Zhang, Hao,Yang, Yan,Chen, Xiao-Chen,Yang, Yue-Hua,Cheng, Hong-Yan,Sun, Xin-Chen Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.15

Objective: Liposarcoma (LPS) is the most common soft tissue sarcoma and accounts for approximately 20% of all mesenchymal malignancies, often occurring in deep soft tissue of retroperitoneal space. Accurate preoperative diagnosis is therefore necessary. We explored whether computed tomography (CT) could be used to differentiate between the various types of retroperitoneal liposarcoma (RPLS). Method: Forty-seven cases of RPLS, diagnosed surgically and histologically, were analyzed retrospectively. CT features were correlated with postoperative pathological appearance. Results: The study radiologist identified 29, 11, 2, 2 and 3 RPLS as atypical lipomatous tumor/well-differentiated liposarcoma (ALT/WDL), dedifferentiated liposarcoma (DDL), myxoid/round cell liposarcoma (ML/RCL), pleomorphic liposarcoma (PL) and mixed-type liposarcoma. Analysis of CT scans revealed the following typical findings of the different subtypes of RPLS: ALT/WDL was mainly visible as a well-delineated fatty hypodense tumor with uniform density and integrity margin; DDL was marked by the combination of focal nodular density and hypervascularity. ML/RCL, PL and mixed liposarcoma showed malignant biological behaviour and CT findings need further studies. Conclusions: CT scanning can reveal important details including internal components, margins and surrounding tissues. Based on CT findings, tumor type can be roughly evaluated and biopsy location and therapeutic scheme guided.

Surgical Experience with Retroperitoneal Liposarcoma in a Single Korean Tertiary Medical Center

나준채,최경화,양승철,한웅규 대한비뇨의학회 2012 Investigative and Clinical Urology Vol.53 No.5

Purpose: This is a report of the surgical treatment and prognosis of retroperitoneal liposarcoma (RPLS) in Koreans. Materials and Methods: Nineteen patients treated for RPLS between July 1, 1984, and March 31, 2009, were included. Patient demographics, histopathologic subtypes, survival rate, disease recurrence rate and interval, and adjuvant therapy were reviewed and analyzed. Results: Of the 19 patients diagnosed with RPLS, 26.3% presented with well-differentiated RPLS, 10.5% with dedifferentiated RPLS, 15.8% with myxoid/round cell type, and 47.4% with mixed-type liposarcoma. The mean follow-up period was 66.8 months (range, 6 to 165 months). Primary RPLS was treated in 17 patients. Nine patients (52.9%) had recurrent disease, and recurrence developed at a mean of 47.7 months after primary or repeated surgical treatment. The overall survival rate was 84.2% during a mean follow-up of 66.8 months. The 3- and 5-year survival rates were 86.9%, and the 10-year survival rate was 69.5%. The recurrence interval was significantly shorter in recurrent RPLS cases (p=0.023). The mean growth rate of locally recurrent tumors was 0.34 cm per month. Conclusions: The survival rates reported here were higher than in previous studies. Locally recurrent tumors presented with a low growth rate, which may have contributed to the relatively high survival rate. A high prevalence of mixed-type RPLS was also noted, and its cause and prognosis require further research. Purpose: This is a report of the surgical treatment and prognosis of retroperitoneal liposarcoma (RPLS) in Koreans. Materials and Methods: Nineteen patients treated for RPLS between July 1, 1984, and March 31, 2009, were included. Patient demographics, histopathologic subtypes, survival rate, disease recurrence rate and interval, and adjuvant therapy were reviewed and analyzed. Results: Of the 19 patients diagnosed with RPLS, 26.3% presented with well-differentiated RPLS, 10.5% with dedifferentiated RPLS, 15.8% with myxoid/round cell type, and 47.4% with mixed-type liposarcoma. The mean follow-up period was 66.8 months (range, 6 to 165 months). Primary RPLS was treated in 17 patients. Nine patients (52.9%) had recurrent disease, and recurrence developed at a mean of 47.7 months after primary or repeated surgical treatment. The overall survival rate was 84.2% during a mean follow-up of 66.8 months. The 3- and 5-year survival rates were 86.9%, and the 10-year survival rate was 69.5%. The recurrence interval was significantly shorter in recurrent RPLS cases (p=0.023). The mean growth rate of locally recurrent tumors was 0.34 cm per month. Conclusions: The survival rates reported here were higher than in previous studies. Locally recurrent tumors presented with a low growth rate, which may have contributed to the relatively high survival rate. A high prevalence of mixed-type RPLS was also noted, and its cause and prognosis require further research.

A retroperitoneal dedifferentiated liposarcoma mimicking an ovarian tumor

( Hyojin Kim ),( Taewon Jeong ),( Yeongho Lee ),( Gyeonga Kim ),( Sanggi Hong ),( Sukyung Beck ),( Jeongbeom Mun ),( Kyongjin Kim ),( Myeongjin Ju ) 대한산부인과학회 2017 Obstetrics & Gynecology Science Vol.60 No.6

A 74-year-old postmenopausal woman visited our gynecology clinic complaining of a palpable abdominal mass. Physical and radiological evaluation indicated that the mass exhibited features of a left ovarian neoplasm showing heterogeneous enhancement. Surgical resection was performed to confirm this suspicion. During surgery, a mass was observed only in the left ovary with no invasive growth, but adhesions to the surrounding peritoneum were seen. Given the patient's age, large mass size, and accompanying uterine myoma and right ovarian cyst, total abdominal hysterectomy with bilateral salpingo-oophorectomy was performed. The final pathologic diagnosis was dedifferentiated liposarcoma. The liposarcoma was suspected to originate from retroperitoneal adipose tissue rather than the ovary. Radiotherapy was planned if a gross lesion indicating recurrence followed 6 months later. This case required a considerable multi-disciplinary approach for diagnosis and treatment because of its ambiguous clinical and radiological findings.

Retroperitoneal liposarcoma: the role of adjuvant radiation therapy and the prognostic factors

이홍석,유정일,임도훈,김성주 대한방사선종양학회 2016 Radiation Oncology Journal Vol.34 No.3

Purpose: To evaluate the benefit of adjuvant radiation therapy (RT) for retroperitoneal liposarcoma (RPLS) following gross tumor removal. Materials and Methods: We reviewed 77 patients with primary RPLS surgically treated between January 2000 and December 2013. Cases with gross residual disease were excluded. Tumor grade was evaluated according to the French Federation of Cancer Centers Sarcoma Group (FNCLCC) system. Adjuvant RT was delivered to 32 patients (42%) using external beam RT alone. Median follow-up time was 36 months (range, 5 to 169). Results: Among 77 patients, 33 (43%) presented with well-differentiated, 31 (40%) with de-differentiated, 8 (10%) with myxoid/round and 4 (5%) with pleomorphic morphology. The RT group included less well-differentiated subtype than surgery group (28% vs. 53%). During follow up, 34 patients (44%) showed local recurrence. Local recurrence rate was lower in the RT group (38%) compared to the surgery group (49%). The 3-year local control rate (LC) was 55.6%, and the 3-year overall survival (OS) was 82.1%. Tumor histology and FNCLCC grade were significantly associated with local recurrence. There was no statistical significance of adding adjuvant RT in LC (p = 0.312). However, patients with tumor histology other than well-differentiated subtype showed marginally decreased local recurrence rate after adjuvant RT (3-year LC, RT 43.9% vs. no RT 35.3%; p = 0.087). Conclusion: RPLS patients receiving RT experienced less local recurrence. We suggest that the addition of adjuvant RT may be related to improvement of LCs, especially in patients with non-favorable histologic subtypes.

Retroperitoneal liposarcoma: the role of adjuvant radiation therapy and the prognostic factors

Hong Seok Lee,Jeong Il Yu,Do Hoon Lim,Sung Joo Kim 대한방사선종양학회 2016 Radiation Oncology Journal Vol.34 No.3

Purpose: To evaluate the benefit of adjuvant radiation therapy (RT) for retroperitoneal liposarcoma (RPLS) following gross tumor removal. Materials and Methods: We reviewed 77 patients with primary RPLS surgically treated between January 2000 and December 2013. Cases with gross residual disease were excluded. Tumor grade was evaluated according to the French Federation of Cancer Centers Sarcoma Group (FNCLCC) system. Adjuvant RT was delivered to 32 patients (42%) using external beam RT alone. Median follow-up time was 36 months (range, 5 to 169). Results: Among 77 patients, 33 (43%) presented with well-differentiated, 31 (40%) with de-differentiated, 8 (10%) with myxoid/ round and 4 (5%) with pleomorphic morphology. The RT group included less well-differentiated subtype than surgery group (28% vs. 53%). During follow up, 34 patients (44%) showed local recurrence. Local recurrence rate was lower in the RT group (38%) compared to the surgery group (49%). The 3-year local control rate (LC) was 55.6%, and the 3-year overall survival (OS) was 82.1%. Tumor histology and FNCLCC grade were significantly associated with local recurrence. There was no statistical significance of adding adjuvant RT in LC (p = 0.312). However, patients with tumor histology other than well-differentiated subtype showed marginally decreased local recurrence rate after adjuvant RT (3-year LC, RT 43.9% vs. no RT 35.3%; p = 0.087). Conclusion: RPLS patients receiving RT experienced less local recurrence. We suggest that the addition of adjuvant RT may be related to improvement of LCs, especially in patients with non-favorable histologic subtypes.

Retroperitoneal liposarcoma: the role of adjuvant radiation therapy and the prognostic factors

Lee, Hong Seok,Yu, Jeong Il,Lim, Do Hoon,Kim, Sung Joo The Korean Society for Radiation Oncology 2016 Radiation Oncology Journal Vol.34 No.3

Purpose: To evaluate the benefit of adjuvant radiation therapy (RT) for retroperitoneal liposarcoma (RPLS) following gross tumor removal. Materials and Methods: We reviewed 77 patients with primary RPLS surgically treated between January 2000 and December 2013. Cases with gross residual disease were excluded. Tumor grade was evaluated according to the French Federation of Cancer Centers Sarcoma Group (FNCLCC) system. Adjuvant RT was delivered to 32 patients (42%) using external beam RT alone. Median follow-up time was 36 months (range, 5 to 169). Results: Among 77 patients, 33 (43%) presented with well-differentiated, 31 (40%) with de-differentiated, 8 (10%) with myxoid/round and 4 (5%) with pleomorphic morphology. The RT group included less well-differentiated subtype than surgery group (28% vs. 53%). During follow up, 34 patients (44%) showed local recurrence. Local recurrence rate was lower in the RT group (38%) compared to the surgery group (49%). The 3-year local control rate (LC) was 55.6%, and the 3-year overall survival (OS) was 82.1%. Tumor histology and FNCLCC grade were significantly associated with local recurrence. There was no statistical significance of adding adjuvant RT in LC (p = 0.312). However, patients with tumor histology other than well-differentiated subtype showed marginally decreased local recurrence rate after adjuvant RT (3-year LC, RT 43.9% vs. no RT 35.3%; p = 0.087). Conclusion: RPLS patients receiving RT experienced less local recurrence. We suggest that the addition of adjuvant RT may be related to improvement of LCs, especially in patients with non-favorable histologic subtypes.

지속성 외래 복막 투석 환자에게 발생한 후복막 지방육종

엄욱현 ( Wook Hyun Um ),이승원 ( Seung Won Lee ),박근호 ( Geun Ho Park ),이승우 ( Seoung Woo Lee ),김수한 ( Soo Han Kim ),김은주 ( Eun Joo Kim ),박현주 ( Hyun Joo Park ),송준호 ( Joon Ho Song ),김문재 ( Moon Jae Kim ),김준미 ( Joo 대한신장학회 2007 Kidney Research and Clinical Practice Vol.26 No.1

Liposarcoma accounts for at least 20% of all soft tissue sarcoma in adults and occur anywhere in the body, although about 14% of cases arise from retroperitoneum. Liposarcoma usually presents as a painless, enlarging mass that can slowly grow over many years. We here report a case of retroperitoneal liposarcoma in a 52 years old female patient undergoing continuous ambulatory peritoneal dialysis. Retroperitoneal liposarcoma was incidentally found by computed tomography which was performed due to ventral hernia and confirmed by ultrasonography guided-biopsy. She was treated successfully by wide surgical resection and transferred to hemodialysis.

한방 치료로 수술 및 방사선 치료 후 부작용 완화를 이룬 후복막 지방육종 환자 2례의 보고

배겨레,김지혜,박지혜,박소정,강휘중,조종관,유화승,Bae, Kyeore,Kim, Ji-Hye,Park, Ji-Hye,Park, So-jung,Kang, Hwi-joong,Cho, Chong-kwan,Yoo, Hwa-seung 대한암한의학회 2015 大韓癌韓醫學會誌 Vol.20 No.2

Objectives : Retroperitoneal liposarcoma (RPS) is a rare solid tumor and has a high recurrence rate after surgery. New complementary and alternative medicine is required to manage symptoms of RPS and side effects of surgery, chemotherapy and radiation therapy. The purpose of this case report is to report two cases of reduction of side effects of surgery and radiation therapy in RPS treated with Wheel Balanced Therapy (WBT) which is a traditional Korean medicine treatment program for patients with cancer. Methods : Two patients with RPS were treated with WBT. Each of patients received personalized WBT schedule including acupuncture. The changes in clinical and laboratory findings were evaluated. Results : The symptoms of patients were improved after about 2 weeks hospitalization. Conclusions : This case report suggests that WBT has a potential to treat side effects of surgery and radiation therapy in patients with RPS. Further rigorous studies are necessary to investigate the therapeutic effects of WBT on RPS.

Dedifferentiated Retroperitoneal Liposarcoma Presenting as Right Inguinal Hernia: A Case Report

김정명,최문형,이수림,구영미 대한영상의학회 2016 대한영상의학회지 Vol.74 No.1

Retroperitoneal liposarcomas usually present as painless, slow-growing abdominal masses. When masses grow large enough to compress surrounding structures, symptoms may occur. Retroperitoneal liposarcoma clinically manifesting as inguinal hernia is a very rare entity; only 11 cases have been reported. Herein, we present radiographic features of a 37-year-old male with a painless palpable mass in the right groin that was identified as dedifferentiated retroperitoneal liposarcoma herniated through the right inguinal canal.