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Yu Z, Li R, Yuan Z, Ye J, He P, Li P, Sun Y, Zhao X. Identification of predictors for short-term recurrence: comprehensive analysis of 296 retroperitoneal liposarcoma cases. World J Surg Oncol 2024; 22:46. [PMID: 38321480 PMCID: PMC10845741 DOI: 10.1186/s12957-024-03328-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Accepted: 01/30/2024] [Indexed: 02/08/2024] Open
Abstract
BACKGROUND The short-term (≤ 1 year) recurrence (STR) is the primary determinant impacting both the life quality and survival duration in patients who have undergone surgical resection for retroperitoneal liposarcoma (RPLS), a condition with intricate and ambiguous pathogenesis. The purpose of this study was to analyze the risk factors associated with STR in cases of RPLS and primary retroperitoneal liposarcoma (PRPLS). METHODS For this retrospective observational study, a total of 296 RPLS cases were selected as research subjects, who experienced tumor recurrence during the follow-up period. The Local recurrence-free survival (LRFS) rates were estimated using the Kaplan-Meier method and subsequently compared between groups utilizing the log-rank test. The subsequent analyses involved univariate and multivariate logistic regression to identify predictors of STR in RPLS cases. Additionally, a logistic regression model was constructed for PRPLS. RESULTS The 1-, 3-, and 5-year LRFS rates of the 296 RPLS cases were 51.7%, 16.9%, and 7.1%, respectively. In the univariate analysis, several factors were found to be associated with STR, including preoperative neutrophil/lymphocyte ratio (NLR), smoking history, surgical frequency, combined organ excision, operative time, intraoperative bleeding, transfer to the intensive care unit (ICU), multiple primary tumors, tumor shape and capsule characteristics, histological subtype, and presence of tumor necrosis. The elevated preoperative NLR, surgical frequency of ≥ 3 times, transfer to the ICU, presence of multiple primary tumors, and tumor necrosis were identified as independent risk factors for STR in surgically resected RPLS. Conversely, diabetes, intact tumor capsule, and well-differentiated histological subtype appeared to be independent protective factors. Analysis for PRPLS revealed that tumor capsule and tumor necrosis were independent predictors of STR. CONCLUSIONS The elevated preoperative NLR, surgical frequency of ≥ 3 times, transfer to the ICU, presence of multiple primary tumors, tumor necrosis, and tumor capsule were expected to serve as predictive factors of STR for surgical resected RPLS and PRPLS.
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Affiliation(s)
- Zhiyuan Yu
- Medical School of Chinese PLA, Beijing, China
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Beijing, China
- School of Medicine, Nankai University, Tianjin, China
| | - Rui Li
- Medical School of Chinese PLA, Beijing, China
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Beijing, China
- School of Medicine, Nankai University, Tianjin, China
| | - Zhen Yuan
- Medical School of Chinese PLA, Beijing, China
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Beijing, China
- School of Medicine, Nankai University, Tianjin, China
| | - Jiahu Ye
- Outpatient Department of Hongshankou, Jingbei Medical District, Chinese PLA General Hospital, Beijing, China
| | - Ping He
- Medical School of Chinese PLA, Beijing, China
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Beijing, China
- School of Medicine, Nankai University, Tianjin, China
| | - Peiyu Li
- Medical School of Chinese PLA, Beijing, China
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Beijing, China
- School of Medicine, Nankai University, Tianjin, China
| | - Yan Sun
- Department of General Surgery, Second Affiliated Hospital of Harbin Medical University, Heilongjiang Province, Harbin, China.
| | - Xudong Zhao
- Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Beijing, China.
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Vlăsceanu VI, Soroceanu RP, Timofte DV, Iordache AG, Strobescu CC, Timofeiov S. Retroperitoneal liposarcoma: unveiling diagnostic delays and multimodal treatment dilemmas. Arch Clin Cases 2023; 10:187-190. [PMID: 38098695 PMCID: PMC10719986 DOI: 10.22551/2023.41.1004.10272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023] Open
Abstract
Liposarcomas are a prevalent subtype of soft tissue sarcomas, constituting less than 1% of all malignancies. Originating in the adipose tissue, they can manifest in various locations and are categorized by the World Health Organization into several subtypes: well-differentiated liposarcomas, dedifferentiated liposarcomas, myxoid liposarcomas, pleomorphic liposarcomas and mixed-type liposarcomas. These tumors typically affect middle-aged and older individuals, and their incidence has been progressively increasing over the years. As liposarcomas advance they tend to encase blood vessels and major organs, particularly in the retroperitoneal area. Often asymptomatic initially, symptoms arise as the tumor reaches a considerable size, exerting pressure on adjacent tissues and organs. This report features a 54-year-old patient incidentally diagnosed with a substantial retroperitoneal tumor extending to the antero-lateral abdominal wall and inner thigh via the right inguinal ligament. The patient, with a previous three-year history of a right inguinal mass, sought acute care for a perianal abscess The histological examination revealed morphological aspects consistent with a low-grade myxoid liposarcoma. While surgery remains the primary treatment for retroperitoneal liposarcomas, controversies exist regarding the role of radiotherapy and chemotherapy in improving survival rates. This case highlights the challenges in managing retroperitoneal tumors and underscores the importance of a personalized, multidisciplinary approach to optimize patient outcomes.
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Affiliation(s)
- Vlad Ionuţ Vlăsceanu
- 3 Surgical Unit, “Sf. Spiridon” County Clinical Emergency Hospital, 700111 Iaşi, Romania
| | - Radu Petru Soroceanu
- 3 Surgical Unit, “Sf. Spiridon” County Clinical Emergency Hospital, 700111 Iaşi, Romania
- Department of Surgery, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iaşi, Romania
| | - Daniel Vasile Timofte
- 3 Surgical Unit, “Sf. Spiridon” County Clinical Emergency Hospital, 700111 Iaşi, Romania
- Department of Surgery, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iaşi, Romania
| | - Andi Gabriel Iordache
- 3 Surgical Unit, “Sf. Spiridon” County Clinical Emergency Hospital, 700111 Iaşi, Romania
| | - Cristina Ciobanu Strobescu
- 3 Surgical Unit, “Sf. Spiridon” County Clinical Emergency Hospital, 700111 Iaşi, Romania
- Vascular Surgical Unit, “Sf. Spiridon” County Clinical Emergency Hospital, 700111 Iaşi, Romania
| | - Sergiu Timofeiov
- 3 Surgical Unit, “Sf. Spiridon” County Clinical Emergency Hospital, 700111 Iaşi, Romania
- Department of Surgery, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iaşi, Romania
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Deng H, Gao J, Xu X, Liu G, Song L, Pan Y, Wei B. Predictors and outcomes of recurrent retroperitoneal liposarcoma: new insights into its recurrence patterns. BMC Cancer 2023; 23:1076. [PMID: 37936091 PMCID: PMC10631151 DOI: 10.1186/s12885-023-11586-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Accepted: 10/29/2023] [Indexed: 11/09/2023] Open
Abstract
BACKGROUND The clinical profiles of recurrent retroperitoneal liposarcoma (RLS) need to be explored. The recurrence patterns of RLS are controversial and ambiguous. METHODS A total of 138 patients with recurrent RLS were finally recruited in the study. The analysis of overall survival (OS) and recurrence-free survival (RFS) was performed by Kaplan‒Meier analysis. To identify independent prognostic factors, all significant variables on univariate Cox regression analysis (P ≤ 0.05) were subjected to multivariate Cox regression analysis. The corresponding nomogram model was further built to predict the survival status of patients. RESULTS Among patients, the 1-, 3-, and 5-year OS rates were 70.7%, 35.9% and 30.9%, respectively. The 1-, 3- and 5-year RFS rates of the 55 patients who underwent R0 resection were 76.1%, 50.8% and 34.4%, respectively. The multivariate analysis revealed that resection method, tumor size, status of pathological differentiation, pathological subtypes and recurrence pattern were independent risk factors for OS or RFS. Patients with distant recurrence (DR) pattern usually had multifocal tumors (90.5% vs. 74.7%, P < 0.05); they were prone to experience changes of pathological differentiation (69.9% vs. 33.3%, P < 0.05) and had a better prognosis than those with local recurrence (LR) pattern. R0 resection and combined organ resection favored the survival of patients with DR pattern in some cases. CONCLUSIONS Patients with DR pattern had better prognosis, and they may benefit more from aggressive combined resection than those with LR pattern. Classifying the recurrence patterns of RLS provides guidance for individualized clinical management of recurrent RLS.
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Affiliation(s)
- Huan Deng
- Department of Gastrointestinal Surgery, Peking University First Hospital, Beijing, 100034, China
- Department of General Surgery, the First Medical Center, Chinese People's Liberation Army General Hospital, Beijing, 100853, China
| | - Jingwang Gao
- Department of General Surgery, the First Medical Center, Chinese People's Liberation Army General Hospital, Beijing, 100853, China
| | - Xingming Xu
- Department of General Surgery, the First Medical Center, Chinese People's Liberation Army General Hospital, Beijing, 100853, China
| | - Guibin Liu
- Department of General Surgery, the First Medical Center, Chinese People's Liberation Army General Hospital, Beijing, 100853, China
| | - Liqiang Song
- Department of General Surgery, the First Medical Center, Chinese People's Liberation Army General Hospital, Beijing, 100853, China
| | - Yisheng Pan
- Department of Gastrointestinal Surgery, Peking University First Hospital, Beijing, 100034, China.
| | - Bo Wei
- Department of General Surgery, the First Medical Center, Chinese People's Liberation Army General Hospital, Beijing, 100853, China.
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Deng H, Xu X, Gao J, Huang J, Liu G, Song L, Wei B. Predictors and outcomes of recurrent retroperitoneal liposarcoma with multiple tumors. Front Med (Lausanne) 2023; 10:1161494. [PMID: 37746091 PMCID: PMC10514494 DOI: 10.3389/fmed.2023.1161494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 08/29/2023] [Indexed: 09/26/2023] Open
Abstract
Background Retroperitoneal liposarcoma (RLS) is a rare but severe disease. Repeated postoperative recurrence with multiple tumors is a therapeutic dilemma. The clinical outcomes and survival predictors of recurrent RLS with multiple tumors remain to be explored. Methods Patients with recurrent RLS were retrospectively analyzed. Univariate and multivariate analysis was performed to find independent prognostic factors that were correlated with Overall survival (OS) or progression-free survival (PFS). Factors significant in univariate analysis were further included into multivariate Cox proportional hazards regression model. The nomogram model was built to predict the survival status of patients. Variables that were significant in multivariable analysis were added to the internally validated nomogram models. The analysis of OS and PFS was performed by Kaplan-Meier analysis and log-rank test. Results A total of 113 recurrent RLS patients with multiple tumors were enrolled in the study. The 1-, 3-, and 5-years OS (PFS) rates were 70.7% (76.1%), 35.9% (76.1%), and 30.9% (76.1%), respectively. Univariate and multivariate analyses showed that number of surgeries, resection methods, tumor size, status of pathological differentiation, pathological subtypes, and recurrence patterns were important prognostic factors for OS or PFS (each p < 0.05). Nomogram models were established to efficiently predict the prognostic status of patients. Patients with the local recurrence (LR) pattern had a poor prognosis and would derive no survival benefit from combined organ resection and R0/R1 resection (each p < 0.05). Conclusion RLS patients recurrence with multiple tumors had a poor prognosis. Those patients should be followed up more frequently after surgery. The strategies of aggressive resection may not improve the survival of patients with LR pattern in the retroperitoneum. Prognostic factors in the efficient nomogram models should be considered in the individualized clinical management of recurrent RLS with multiple tumors.
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Affiliation(s)
- Huan Deng
- Department of Gastrointestinal Surgery, Peking University First Hospital, Beijing, China
- Department of General Surgery, The First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
| | - Xingming Xu
- Department of General Surgery, The First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
| | - Jingwang Gao
- Department of General Surgery, The First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
| | - Jun Huang
- Department of General Surgery, The First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
| | - Guibin Liu
- Department of General Surgery, The First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
| | - Liqiang Song
- Department of General Surgery, The First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
| | - Bo Wei
- Department of General Surgery, The First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
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Yu Z, Zhao X, Gao J, Zhou S, Li P, Liu N. Correlation Analysis Between Demographic, Surgical, and Pathological Characteristics with Local Recurrence-Free Survival for Surgical Resected Retroperitoneal Liposarcoma. World J Surg 2023; 47:1946-1955. [PMID: 37071133 DOI: 10.1007/s00268-023-07009-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/02/2023] [Indexed: 04/19/2023]
Abstract
BACKGROUND As the leading cause of mortality for retroperitoneal liposarcoma (RPLS) cases, postoperative recurrence has complicated and unclear risk factors. This study was conducted to explore the correlations between demographic, surgical, and pathological characteristics with local recurrence-free survival (LRFS) for surgical resected RPLS. METHODS RPLS cases that underwent radical operation were considered to be included in this analysis. LRFS rates were estimated based on the Kaplan-Meier method and were compared between groups by the log-rank test. Cox proportional hazard regression models were constructed to identified the predictors of LRFS. Subsequently, the independent predictors acquired from multivariate analyses were used to construct a nomogram. RESULTS 348 RPLS cases who underwent radical operation were included. Of the 348 cases, 333 had tumor recurrence or with a follow-up period ≥5 years. Thus, 296 (88.9%) of the 333 cases had recurrent disease, and the median LRFS duration of 296 recurrence cases was 17.0 (95% confidence interval (CI) 13.2-20.8) months. Multivariate analysis identified the preoperative neutrophil/lymphocyte ratio (NLR), surgical frequency, operative time, tumor shape, histological subtype, and tumor necrosis as independent predictors of LRFS. Based on above independent predictors, a nomogram was constructed to predict the 1-, 3-, and 5-year LRFS of surgical resected RPLS. CONCLUSION Elevated preoperative NLR, ≥2nd time surgical frequency, extended operation time, irregular tumor shape, no well-differentiated histological subtype, and tumor necrosis could be used as predictors of LRFS for surgical resected RPLS.
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Affiliation(s)
- Zhiyuan Yu
- School of Medicine, Nankai University, Tianjin, China
- Medical School of Chinese PLA, Beijing, China
- Senior Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Fuxing Road 28, Haidian District, Beijing, 100853, China
| | - Xudong Zhao
- Senior Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Fuxing Road 28, Haidian District, Beijing, 100853, China
| | - Jingwang Gao
- Medical School of Chinese PLA, Beijing, China
- Senior Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Fuxing Road 28, Haidian District, Beijing, 100853, China
| | - Sixin Zhou
- Senior Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Fuxing Road 28, Haidian District, Beijing, 100853, China
| | - Peiyu Li
- School of Medicine, Nankai University, Tianjin, China.
- Medical School of Chinese PLA, Beijing, China.
- Senior Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Fuxing Road 28, Haidian District, Beijing, 100853, China.
| | - Na Liu
- Medical School of Chinese PLA, Beijing, China.
- Senior Department of General Surgery, The First Medical Center, Chinese PLA General Hospital, Fuxing Road 28, Haidian District, Beijing, 100853, China.
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Yu ZY, Gao JW, Liu N, Zhou SX, Zhao XD, Li PY. Predictive factors and a novel nomogram for recurrence of primary retroperitoneal liposarcoma: Comprehensive analysis of 128 cases. Oncol Lett 2023; 25:257. [PMID: 37485421 PMCID: PMC10360145 DOI: 10.3892/ol.2023.13843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 04/17/2023] [Indexed: 07/25/2023] Open
Abstract
Since primary retroperitoneal liposarcoma (PRPLS) is rare in the clinic, related clinical studies are lacking. The present study was designed to investigate the predictive factors of short-term (≤1 year) recurrence (STR) and construct a novel nomogram of local recurrence-free survival (LRFS) for surgically resected PRPLS. A total of 128 PRPLS cases who underwent radical surgery were retrospectively analyzed. Based on the interval from the operation to tumor recurrence, the predictors of STR were screened using univariate and multivariate logistic regression analyses. Cox proportional hazard regression models were applied to identify the predictors of LRFS. Furthermore, the independent predictors acquired from multivariate analyses were used to construct a nomogram. Multivariate logistic regression analysis revealed that age ≥55 years [odds ratio (OR)=5.607, P=0.010], operative time ≥260 min (OR=9.716, P=0.005) and tumor necrosis (OR=3.781, P=0.037) were independent risk factors of STR for PRPLS. In the Cox regression analysis, clinical symptoms [hazard ratio (HR)=1.746, P=0.017], resection method (OR=0.370, P=0.021) and de-differentiated histological subtype (HR=1.975, P=0.048) were identified as independent predictors of LRFS. Subsequently, the independent predictors acquired from multivariate analyses were used to construct a nomogram for LRFS. Age, operative time, tumor necrosis, clinical symptoms, resection method and histological subtype were related to recurrence for surgically resected PRPLS and a novel nomogram was constructed based on the above predictors.
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Affiliation(s)
- Zhi-Yuan Yu
- School of Medicine, Nankai University, Tianjin 300071, P.R. China
- Medical School of Chinese People's Liberation Army, Beijing 100853, P.R. China
- Department of General Surgery, The First Medical Center, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
| | - Jing-Wang Gao
- Medical School of Chinese People's Liberation Army, Beijing 100853, P.R. China
- Department of General Surgery, The First Medical Center, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
| | - Na Liu
- Medical School of Chinese People's Liberation Army, Beijing 100853, P.R. China
- Department of General Surgery, The First Medical Center, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
| | - Si-Xin Zhou
- Department of General Surgery, The First Medical Center, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
| | - Xu-Dong Zhao
- Department of General Surgery, The First Medical Center, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
| | - Pei-Yu Li
- School of Medicine, Nankai University, Tianjin 300071, P.R. China
- Medical School of Chinese People's Liberation Army, Beijing 100853, P.R. China
- Department of General Surgery, The First Medical Center, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
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Paik B, Seo CJ, Tan JWS, Juan WKD, Soo KC, Ong CAJ, Chia CS, Wong JSM. A systematic review of margin status in retroperitoneal liposarcomas: Does the R0 margin matter? Front Oncol 2022; 12:891710. [PMID: 36033535 PMCID: PMC9404241 DOI: 10.3389/fonc.2022.891710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 07/18/2022] [Indexed: 11/13/2022] Open
Abstract
Retroperitoneal liposarcomas (RPLPSs) are a rare tumor group for which current guidelines recommend aggressive en bloc resection to attain microscopically negative (R0) margins. To ensure R0 margins, resection of adherent or adjacent organs is often required. However, it is still unclear if R0 margins confer any additional benefit to patients over a grossly negative but microscopically positive (R1) margin. We performed a systematic search of PubMed and Embase databases for studies including patients receiving R0 or R1 resection for RPLPS. Nine retrospective cohort studies, one prospective cohort study, and 49 case reports/case series were included. A total of 552 patients with RPLPS were evaluated: 346 underwent R0 resection and 206 underwent R1 resection. In the R0 group, 5-year overall survival (OS) ranged from 58.3% to 85.7%; local recurrence (LR) ranged from 45.5% to 52.3%. In the R1 group, 5-year OS ranged from 35% to 55.3%; LR ranged from 66.7% to 91.7%. Among cohort studies, OS, disease-free survival (DFS), LR rate, and LR-free survival (LRFS) were significantly associated with R0 resections. Assessment of case series and reports suggested that the R0 margin led to a slightly higher morbidity than that of R1. In conclusion, this review found the R0 margin to be associated with reductions in LR rates and improved OS when compared with the R1 margins, though accompanied by slight increases in morbidity. The roles of tumor histotype and perioperative chemotherapy or radiotherapy were not well-elucidated in this review.
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Affiliation(s)
- Benjamin Paik
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - Chin Jin Seo
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
- Sing Health Duke-NUS Surgery Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
| | - Joey Wee-Shan Tan
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
- Laboratory of Applied Human GenetiCJS, Division of Medical Sciences, National Cancer Centre Singapore, Singapore, Singapore
| | - Wen Kai Darryl Juan
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
| | - Khee Chee Soo
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
| | - Chin-Ann Johnny Ong
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
- Sing Health Duke-NUS Surgery Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
- Laboratory of Applied Human GenetiCJS, Division of Medical Sciences, National Cancer Centre Singapore, Singapore, Singapore
- Sing Health Duke-NUS Oncology Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
- Institute of Molecular and Cell Biology, ASTAR Research Entities, Singapore, Singapore
| | - Claramae Shulyn Chia
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
- Sing Health Duke-NUS Surgery Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
- Sing Health Duke-NUS Oncology Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
| | - Jolene Si Min Wong
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, National Cancer Centre Singapore, Singapore, Singapore
- Department of Sarcoma, Peritoneal and Rare Tumours (SPRinT), Division of Surgery and Surgical Oncology, Singapore General Hospital, Singapore, Singapore
- Sing Health Duke-NUS Surgery Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
- Sing Health Duke-NUS Oncology Academic Clinical Program, Duke-NUS Medical School, Singapore, Singapore
- *Correspondence: Jolene Si Min Wong, j
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Li Y, Wu G, Zhang Y, Yang W, Wang X, Duan L, Niu L, Chen J, Zhou W, Liu J, Zhong H, Fan D, Hong L. Development and Validation of a Prognostic Model to Predict the Prognosis of Patients With Retroperitoneal Liposarcoma: A Large International Population-Based Cohort Study. Front Oncol 2022; 12:857827. [PMID: 35719991 PMCID: PMC9201285 DOI: 10.3389/fonc.2022.857827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 05/03/2022] [Indexed: 11/26/2022] Open
Abstract
Background Retroperitoneal liposarcomas (RPLs), sarcoma of mesenchymal origin, are the most common soft tissue sarcomas (STS) of the retroperitoneum. Given the rarity of RPLs, the prognostic values of clinicopathological features in the patients remain unclear. The nomogram can provide a visual interface to aid in calculating the predicted probability that a patient will achieve a particular clinical endpoint and communication with patients. Methods We included a total of 1,392 RPLs patients diagnosed between 2004 and 2015 from the Surveillance, Epidemiology, and End Results (SEER) database. For nomogram construction and validation, patients in the SEER database were divided randomly into the training cohort and internal validation cohort at a ratio of 7:3, while 65 patients with RPLs from our center between 2010 and 2016 served as the external validation cohort. The OS curves were drawn using the Kaplan–Meier method and assessed using the log-rank test. Moreover, Fine and Gray’s competing-risk regression models were conducted to assess CSS. Univariate and multivariate analyses were performed to select the prognostic factors for survival time. We constructed a predictive nomogram based on the results of the multivariate analyses. Results Through univariate and multivariate analyses, it is found that age, histological grade, classification, SEER stage, surgery constitute significant risk factors for OS, and age, classification, SEER stage, AJCC M stage, surgery, and tumor size constitute risk factors for CSS. We found that the nomogram provided a good assessment of OS and CSS at 1, 3, and 5 years in patients with RPLs (1-year OS: (training cohort: AUC = 0.755 (95% CI, 0.714, 0.796); internal validation cohort: AUC = 0.754 (95% CI, 0.681, 0.827); external validation cohort: AUC = 0.793 (95% CI, 0.651, 0.935)); 3-year OS: (training cohort: AUC = 0.782 (95% CI, 0.752, 0.811); internal validation cohort: AUC = 0.788 (95% CI, 0.736, 0.841); external validation cohort: AUC = 0.863 (95% CI, 0.773, 0.954)); 5-year OS: (training cohort: AUC = 0.780 (95% CI, 0.752, 0.808); internal validation cohort: AUC = 0.783 (95% CI, 0.732, 0.834); external validation cohort: AUC = 0.854 (95% CI, 0.762, 0.945)); 1-year CSS: (training cohort: AUC = 0.769 (95% CI, 0.717, 0.821); internal validation cohort: AUC = 0.753 (95% CI, 0.668, 0.838); external validation cohort: AUC = 0.799 (95% CI, 0.616, 0.981)); 3-year CSS: (training cohort: AUC = 0.777 (95% CI, 0.742, 0.811); internal validation cohort: AUC = 0.787 (95% CI, 0.726, 0.849); external validation cohort: AUC = 0.808 (95% CI, 0.673, 0.943)); 5-year CSS: (training cohort: AUC = 0.773 (95% CI, 0.741, 0.805); internal validation cohort: AUC = 0.768 (95% CI, 0.709, 0.827); external validation cohort: AUC = 0.829 (95% CI, 0.712, 0.945))). The calibration plots for the training, internal validation, and external validation cohorts at 1-, 3-, and 5-year OS and CSS indicated that the predicted survival rates closely correspond to the actual survival rates. Conclusion We constructed and externally validated an unprecedented nomogram prognostic model for patients with RPLs. The nomogram can be used as a potential, objective, and supplementary tool for clinicians to predict the prognosis of RPLs patients around the world.
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Affiliation(s)
- Yiding Li
- State Key Laboratory of Cancer Biology and National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Guiling Wu
- School of Aerospace Medicine, Fourth Military Medical University, Xi'an, China
| | - Yujie Zhang
- Department of Histology and Embryology, School of Basic Medicine, Xi'an Medical University, Xi'an, China
| | - Wanli Yang
- State Key Laboratory of Cancer Biology and National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Xiaoqian Wang
- State Key Laboratory of Cancer Biology and National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Lili Duan
- State Key Laboratory of Cancer Biology and National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Liaoran Niu
- State Key Laboratory of Cancer Biology and National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Junfeng Chen
- State Key Laboratory of Cancer Biology and National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Wei Zhou
- State Key Laboratory of Cancer Biology and National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Jinqiang Liu
- State Key Laboratory of Cancer Biology and National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Helun Zhong
- Treatment Centre for Traumatic Injures, Academy of Orthopedics Guangdong Province, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China
| | - Daiming Fan
- State Key Laboratory of Cancer Biology and National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
| | - Liu Hong
- State Key Laboratory of Cancer Biology and National Clinical Research Center for Digestive Diseases, Xijing Hospital of Digestive Diseases, Fourth Military Medical University, Xi'an, China
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9
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Spicer JL. Retroperitoneal Liposarcoma: An Unusual Presentation of a Rare Cancer. J Adv Pract Oncol 2022; 12:854-862. [PMID: 35295543 PMCID: PMC8631345 DOI: 10.6004/jadpro.2021.12.8.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Retroperitoneal liposarcomas (RLPS) are rare tumors that have variable clinical behavior and complex treatment strategies based on presentation, histopathology, and genomics. Early identification is critical, and complete surgical resection remains the primary treatment, although chemotherapy and radiation are used on individual bases. Presenting symptoms are often nonspecific; therefore, a high degree of suspicion is essential for early diagnosis. In this report, the management of a 37-year-old otherwise healthy male with a large RLPS causing right groin/testicular pain is presented. After three evaluations in the emergency department, the patient was diagnosed and received two cycles of doxorubicin/ifosfamide/mesna (AIM) neoadjuvant chemotherapy. His physical exam on presentation for second opinion demonstrated a large palpable abdominal mass and fullness around the right spermatic cord. There was no appreciable change in tumor size or distant metastases on repeat scanning. Given some obstructive symptoms, a multidisciplinary team advised neoadjuvant radiation followed by radical resection of RLPS. Final pathology demonstrated a 31-cm grade II well-differentiated (WD) liposarcoma with low-grade dedifferentiation. Scattered foci of microscopic positive WD margins were noted, and the remainder of margins were negative. Genomic evaluation showed amplification of CDK4, MDM2, and FRS2. A concise literature review of common presentations, histopathology, genomics, and treatment information is discussed herein. Thorough physical exams, attention to subtle findings, appropriate medical imaging studies, and a high index of suspicion when evaluating vague symptomatology can lead to earlier diagnosis and treatment of RLPS, and ultimately better patient outcomes.
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10
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Chen J, Hang Y, Gao Q, Huang X. Surgical Diagnosis and Treatment of Primary Retroperitoneal Liposarcoma. Front Surg 2021; 8:672669. [PMID: 34150840 PMCID: PMC8211986 DOI: 10.3389/fsurg.2021.672669] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 05/10/2021] [Indexed: 12/30/2022] Open
Abstract
Background: Primary retroperitoneal liposarcoma (PRPLS) is the most common soft tissue sarcoma of the retroperitoneum with high recurrence rate and short overall survival (OS). Methods: A retrospective review of 51 patients with PRPLS, treated between September 1, 2009 and November 30, 2020, was conducted to evaluate clinical outcomes of PRPLS resection. Patient demographics, histopathologic subtypes, overall survival (OS), progression-free survival (PFS), disease recurrence rate, and tumor stage were reviewed and analyzed. Univariate analysis was done to identify factors potentially affecting OS and PFS of PRPLS patients. Multivariate Cox proportional hazards analysis was used to evaluate the impact of various clinicopathological factors on OS and PFS of PRPLS patients. Results: Fifty-one PRPLS patients (28 Males, 23 Females; mean age 56.25 years) were evaluated. There was no significant effect of age, gender, contiguous organ resection, degree of differentiation and tumor size on the OS and PFS of the patients. Univariate analysis showed that negative surgical margin and early tumor stage significantly correlated with OS and PFS (all P < 0.001). Multivariate analysis showed that tumor stage [hazard ratio (HR) = 1.177, P = 0.001] was an independent predictors of poor progression-free survival, and surgical margins [HR = 4.0674 P = 0.038] and tumor stage [HR = 1.167 P = 0.001] were identified as independent predictors of poor overall survival. Conclusion: Negative surgical margin is a prognostic factor of OS, and can prolong the postoperative survival time of PRPLS patients. Tumor stage is a prognostic factor for OS and PFS, and can influence the survival of PRPLS patients. Earlier tumor stages of PRPLS are associated with significantly better outcomes.
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Affiliation(s)
- Jie Chen
- Department of General Surgery, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Ying Hang
- Department of Emergency, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Qi Gao
- Department of General Surgery, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Xinyu Huang
- Department of General Surgery, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai, China
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11
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de Arruda JAA, Arantes DAC, Schuch LF, Abreu LG, de Andrade BAB, Romañach MJ, Mesquita RA, Watanabe S, de Oliveira JC, Mendonça EF. Inflammatory Variant of Atypical Lipomatous Tumor/Well-Differentiated Liposarcoma of the Buccal Mucosa: An Overview and Case Report with a 10-Year Follow-Up. Head Neck Pathol 2020; 15:1031-1040. [PMID: 33091145 PMCID: PMC8384926 DOI: 10.1007/s12105-020-01242-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 10/16/2020] [Indexed: 10/23/2022]
Abstract
Liposarcomas of the oral cavity are rare. Those originating in the buccal mucosa cause challenging diagnostic and therapeutic issues since less than 40 cases of liposarcomas of the buccal mucosa and cheek have been reported in the worldwide literature. Herein, we present a case of atypical lipomatous tumor/well-differentiated liposarcoma affecting a 45-year-old female patient. Ultrasonography and magnetic resonance imaging confirmed a well-defined mass located in the right buccal mucosa, extending to the submucosal layers of the cheek. Histopathologically, a well-differentiated fatty neoplasm with presence of prominent stromal inflammatory cells was observed. Multifocally scattered bizarre hyperchromatic stromal cells, some of which multinucleated, were also observed. An immunohistochemical panel comprising vimentin, S-100, CD10, CD34, CD20, CD3, CD68, CD138, MDM2, Ki-67, and P53 was employed to better characterize the lesion. A local recurrence event occurred during a 10-year follow-up period. Surgical resection was performed during both episodes. We also provided an overview of demographic and clinicopathological characteristics, immunohistochemical features, imaging findings, and the differential diagnosis of liposarcoma of the oral cavity. Knowledge of the etiopathological and clinical aspects of this rare neoplasm is fundamental in order to rule out other conditions, including lipomatous lesions that affect the buccal mucosa.
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Affiliation(s)
- José Alcides Almeida de Arruda
- grid.8430.f0000 0001 2181 4888Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6627, room 3202 D. Pampulha, Belo Horizonte, MG CEP: 31.270-901 Brazil
| | - Diego Antônio Costa Arantes
- grid.411195.90000 0001 2192 5801Department of Stomatology (Oral Pathology), School of Dentistry, Universidade Federal de Goiás, Goiânia, GO Brazil
| | - Lauren Frenzel Schuch
- grid.8430.f0000 0001 2181 4888Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6627, room 3202 D. Pampulha, Belo Horizonte, MG CEP: 31.270-901 Brazil
| | - Lucas Guimarães Abreu
- grid.8430.f0000 0001 2181 4888Department of Child’s and Adolescent’s Oral Health, School of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, MG Brazil
| | - Bruno Augusto Benevenuto de Andrade
- grid.8536.80000 0001 2294 473XDepartment of Oral Diagnosis and Pathology, School of Dentistry, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ Brazil
| | - Mário José Romañach
- grid.8536.80000 0001 2294 473XDepartment of Oral Diagnosis and Pathology, School of Dentistry, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ Brazil
| | - Ricardo Alves Mesquita
- grid.8430.f0000 0001 2181 4888Department of Oral Surgery and Pathology, School of Dentistry, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6627, room 3202 D. Pampulha, Belo Horizonte, MG CEP: 31.270-901 Brazil
| | - Satiro Watanabe
- Department of Oral Surgery, School of Dentistry, Universidade de Anápolis, Anápolis, GO Brazil
| | | | - Elismauro Francisco Mendonça
- grid.411195.90000 0001 2192 5801Department of Stomatology (Oral Pathology), School of Dentistry, Universidade Federal de Goiás, Goiânia, GO Brazil
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12
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Feng Y, Zhang W, Luo C. Evaluation of clinical application of multi-slice computerized tomography in primary retroperitoneal tumors. J Clin Lab Anal 2019; 34:e23169. [PMID: 31880021 PMCID: PMC7246388 DOI: 10.1002/jcla.23169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 10/12/2019] [Accepted: 10/19/2019] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND To accurately identify primary retroperitoneal tumors by multi-slice spiral CT (MSCT) for better treatment. MATERIALS AND METHODS The common types of 380 cases of primary retroperitoneal tumor, lesion sites, and MSCT features were compared with pathological results. Fisher's or chi-square test approaches have been applied in this study. RESULTS Multi-slice computerized tomography multi-directional reconstruction has a high accuracy for primary retroperitoneal tumors (95.7%). Seventy-three liposarcoma cases were located in peri-renal space, accounting for 76.8% (13/95) of the tumors in this region. Meanwhile, 65 cases of neurogenic tumors were located in the paravertebral column, accounting for 90.3% (65/72) of the tumors in this region. MSCT examination could effectively distinguish benign from malignant of primary retroperitoneal tumor (sensitivity = 87.2%, specificity = 82.7%, accuracy rate = 84.5%). Malignant tumors showed more irregularity shape than benign tumor (χ2 = 20.468, P < .001). 82.7% (191/231) of the malignant tumors showed adhesion or even invasion of surrounding tissues and organs (χ2 = 23.262, P < .001). Fat density of the lipoma is uniform, and lesion is not enhanced. Liposarcoma can be seen in varying proportions of fat and soft tissue density. CONCLUSION The accuracy of MSCT scan for retroperitoneal tumors is high. Meanwhile, the coincidence rate of qualitative diagnosis before operation and/or before biopsy is also high.
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Affiliation(s)
- Yuanchun Feng
- Radiology Department, Peking University International Hospital, Beijing, China
| | - Wei Zhang
- Radiology Department, Peking University International Hospital, Beijing, China
| | - Chenghua Luo
- Retroperitoneal Tumor Center, Peking University International Hospital, Beijing, China
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13
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[Multiple recurrent retroperitoneal liposarcoma in a 66-year-old man]. Internist (Berl) 2019; 61:217-222. [PMID: 31712872 DOI: 10.1007/s00108-019-00701-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
In this article, the authors present the case of a 66-year-old man who was diagnosed with the first recurrence of his retroperitoneal liposarcoma 7 years after initial diagnosis. In the following 10 years, he needed a total of eight operations, chemotherapy, and radiotherapy because of another seven recurrences. This is the first report on a patient with eight recurrences of a retroperitoneal liposarcoma being in a relatively good general condition even 17 years after initial diagnosis.
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14
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Abufkhaida BS, Alsalameh BK. Recurrent abdominal liposarcoma presenting with intestinal obstruction. J Surg Case Rep 2019; 2019:rjz188. [PMID: 31214325 PMCID: PMC6565820 DOI: 10.1093/jscr/rjz188] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 05/18/2019] [Accepted: 05/24/2019] [Indexed: 12/18/2022] Open
Abstract
Liposarcoma is the most common retroperitoneal sarcoma and mesenchymal tumor in the abdomen. Usually, it presents with vague symptoms due to its large size and slow growth at the time of diagnosis. Liposarcoma is associated with a high local recurrence rate according to its histology, size and growth rate. Up till now, surgical resection is the only effective treatment for primary and recurrent abdominal liposarcoma. Secondary mesenteric liposarcoma is an extremely rare entity and so far a small number of cases have been reported in the literature. In this article, we present a rare case of a 63-year-old female patient who was diagnosed with mesenteric liposarcoma after 3 years of complete excision of retroperitoneal liposarcoma, presenting primarily as abdominal mass causing mechanical intestinal obstruction.
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Affiliation(s)
- Belal S Abufkhaida
- General Surgery Department, Beit-Jala Hospital, Bethlehem 183, Palestine
| | - Barah K Alsalameh
- School of Medicine, ALQUDS University, Bethlehem 183, Palestine
- Correspondence address. School of Medicine, ALQUDS University, Bethlehem 183, Palestine. Tel: +02-2736491; Fax :+02-2731072; E-mail:
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15
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Linares MF, Leonel ACLS, Carvalho EJA, de Castro JFL, de Almeida OP, Perez DEC. Intraoral lipomas: A clinicopathological study of 43 cases, including four cases of spindle cell/pleomorphic subtype. Med Oral Patol Oral Cir Bucal 2019; 24:e373-e378. [PMID: 31041916 PMCID: PMC6530947 DOI: 10.4317/medoral.22931] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 03/15/2019] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND The aim of this study was to describe the clinicopathological characteristics of 43 intraoral lipomas and classify them according to their microscopic variants. MATERIAL AND METHODS All the cases of intraoral lipomas diagnosed at an Oral Pathology service were selected for the study. Clinical data, such as age, gender, location, time of evolution, clinical presentation, clinical hypothesis of diagnosis, and treatment, were collected from the clinical files. RESULTS Of the 43 cases analyzed, 24 (55.8%) occurred in women. The mean age was 77.4 years. The most affected site was the buccal mucosa (22 cases, 51.1%). The mean lesion size was 1.7 cm. Twenty-three cases (53.5%) were classified as simple lipoma, 14 (32.6%) as fibrolipoma, four (9.3%) as spindle cell/pleomorphic lipoma (SC/PL), one (2.3%) as lipoma of the salivary glands, and one (2.3%) as intramuscular lipoma. In one case of SC/PLs, lipoblasts were observed. No atypical lipoblasts or mitoses were noted. Lipoma was considered more often than other tumor histological subtypes among the clinical hypotheses of diagnosis when the final diagnosis was simple lipoma (p=0.01). CONCLUSIONS Intraoral lipomas present different clinical presentation depending on the histological subtype. In SC/PLs, lipoblasts with vacuolated cytoplasm may be found and the presence of mature adipocytes is essential for diagnosis.
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Affiliation(s)
- M-F Linares
- Universidade Federal de Pernambuco, Departamento de Clínica e Odontologia Preventiva, 4th Travessa Professor Artur de Sá, s/n, Cidade Universitária. CEP: 50740-521, Recife/PE, Brazil,
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