Silberstein P

Background: Myxoid liposarcomas (MLS) are intermediate to high grade liposarcomas, which are the most common type of soft tissue sarcoma. Although MLS most frequently develops in the legs, it can arise in any of the body’s soft tissue adipose. Previous studies of MLS survival have been limited in terms of geography, cohort size, variety of treatment settings, and assessment of primary site role. We retrospectively studied survival data for a nationwide cohort of MLS patients to identify prognostic factors and assess their effects on survival.

Methods: Using the National Cancer Database, we obtained data on 4636 patients diagnosed with MLS (ICD-O-3 8852) between 2004 and 2016. 5- and 10-year survival curves were estimated with Kaplan-Meier analysis and compared with log-rank analysis. Cox hazard regression was also used to compare multiple variables’ effects on survival.

Results: Approximately 59.2% of the cohort was male with a median age of presentation of 49 years. The most common site of metastasis was the bone followed by lung, liver, and brain. The majority (46.8%) of patients were stage I at time of diagnosis, followed by stage II with 18.1%, stage III with 13.1%, and stage IV at 5.3%. Overall 5- and 10-year survival probabilities for the cohort were 76.1% and 62.0%. Female patients (5-year: 79.6% and 10-year: 65.5%) had better survivals than male patients (5-year: 73.8% and 10-years: 59.6%). As stage increased, overall survival decreased with stage IV patients having 5- and 10-year survival probabilities of 21.2% and 9.4%, respectively. Patients with tumors localized to the extremities (5-year: 81.2%) had the best overall survival followed by tumors in the head or neck (5-year: 79.9%), pelvis (5-year: 77.3%), pelvis (5-year: 78.0%), thorax or trunk (5-year: 66.5%), and the retroperitoneum or abdomen (5-year: 53.1%). Finally, adjuvant radiation treatment correlated with decreased mortality to surgical resection of primary tumor alone (HR: 0.847; 95% CI: 0.726-0.989), whereas adjuvant chemotherapy correlated with increased mortality (HR: 2.769; 95% CI: 1.995-3.841).

Conclusion: Primary anatomical site was determined to be a major prognostic factor along with treatment facility type, sex, stage, and surgical margins for patients with myxoid liposarcoma.

Background: Myxoid liposarcomas (MLS) are intermediate to high grade liposarcomas, which are the most common type of soft tissue sarcoma. Although MLS most frequently develops in the legs, it can arise in any of the body’s soft tissue adipose. Previous studies of MLS survival have been limited in terms of geography, cohort size, variety of treatment settings, and assessment of primary site role. We retrospectively studied survival data for a nationwide cohort of MLS patients to identify prognostic factors and assess their effects on survival.

Methods: Using the National Cancer Database, we obtained data on 4636 patients diagnosed with MLS (ICD-O-3 8852) between 2004 and 2016. 5- and 10-year survival curves were estimated with Kaplan-Meier analysis and compared with log-rank analysis. Cox hazard regression was also used to compare multiple variables’ effects on survival.

Results: Approximately 59.2% of the cohort was male with a median age of presentation of 49 years. The most common site of metastasis was the bone followed by lung, liver, and brain. The majority (46.8%) of patients were stage I at time of diagnosis, followed by stage II with 18.1%, stage III with 13.1%, and stage IV at 5.3%. Overall 5- and 10-year survival probabilities for the cohort were 76.1% and 62.0%. Female patients (5-year: 79.6% and 10-year: 65.5%) had better survivals than male patients (5-year: 73.8% and 10-years: 59.6%). As stage increased, overall survival decreased with stage IV patients having 5- and 10-year survival probabilities of 21.2% and 9.4%, respectively. Patients with tumors localized to the extremities (5-year: 81.2%) had the best overall survival followed by tumors in the head or neck (5-year: 79.9%), pelvis (5-year: 77.3%), pelvis (5-year: 78.0%), thorax or trunk (5-year: 66.5%), and the retroperitoneum or abdomen (5-year: 53.1%). Finally, adjuvant radiation treatment correlated with decreased mortality to surgical resection of primary tumor alone (HR: 0.847; 95% CI: 0.726-0.989), whereas adjuvant chemotherapy correlated with increased mortality (HR: 2.769; 95% CI: 1.995-3.841).

Conclusion: Primary anatomical site was determined to be a major prognostic factor along with treatment facility type, sex, stage, and surgical margins for patients with myxoid liposarcoma.

Background: Myxoid liposarcomas (MLS) are intermediate to high grade liposarcomas, which are the most common type of soft tissue sarcoma. Although MLS most frequently develops in the legs, it can arise in any of the body’s soft tissue adipose. Previous studies of MLS survival have been limited in terms of geography, cohort size, variety of treatment settings, and assessment of primary site role. We retrospectively studied survival data for a nationwide cohort of MLS patients to identify prognostic factors and assess their effects on survival.

Methods: Using the National Cancer Database, we obtained data on 4636 patients diagnosed with MLS (ICD-O-3 8852) between 2004 and 2016. 5- and 10-year survival curves were estimated with Kaplan-Meier analysis and compared with log-rank analysis. Cox hazard regression was also used to compare multiple variables’ effects on survival.

Results: Approximately 59.2% of the cohort was male with a median age of presentation of 49 years. The most common site of metastasis was the bone followed by lung, liver, and brain. The majority (46.8%) of patients were stage I at time of diagnosis, followed by stage II with 18.1%, stage III with 13.1%, and stage IV at 5.3%. Overall 5- and 10-year survival probabilities for the cohort were 76.1% and 62.0%. Female patients (5-year: 79.6% and 10-year: 65.5%) had better survivals than male patients (5-year: 73.8% and 10-years: 59.6%). As stage increased, overall survival decreased with stage IV patients having 5- and 10-year survival probabilities of 21.2% and 9.4%, respectively. Patients with tumors localized to the extremities (5-year: 81.2%) had the best overall survival followed by tumors in the head or neck (5-year: 79.9%), pelvis (5-year: 77.3%), pelvis (5-year: 78.0%), thorax or trunk (5-year: 66.5%), and the retroperitoneum or abdomen (5-year: 53.1%). Finally, adjuvant radiation treatment correlated with decreased mortality to surgical resection of primary tumor alone (HR: 0.847; 95% CI: 0.726-0.989), whereas adjuvant chemotherapy correlated with increased mortality (HR: 2.769; 95% CI: 1.995-3.841).

Conclusion: Primary anatomical site was determined to be a major prognostic factor along with treatment facility type, sex, stage, and surgical margins for patients with myxoid liposarcoma.

Background: Pleomorphic liposarcomas is an aggressive, high grade subtype of soft tissue sarcoma representing < 15% of liposarcomas. It most commonly arises in the retroperitoneum and proximal upper extremities. Current prognostic factors are centered around staging, which accounts for the grade, size, and location of the tumor in relation to the superficial fascia.

Methods: A total of 1778 patients diagnosed with pleomorphic liposarcoma were identified in the National Cancer Database and stratified by primary anatomical site: head/neck, upper limb, lower limb/hip, thorax/lung, pelvis, and retroperitoneum/abdomen. Kaplan-Meier survival tables were produced to estimate 1-, 5-, and 10-year overall survival. Log-rank tests with a Bonferroni correction for multiple comparisons and a multivariable Cox proportional hazards analysis were utilized to compare the primary site groups; P < 0.05 was considered significant.

Results: The most common primary anatomical site was the lower limb/hip. The head/neck primary anatomical site demonstrated the highest 10-year overall survival probability, while retroperitoneum/abdomen had the lowest (50% and 18.4%, respectively). Median survival was 9.19 years for the head/neck group, and 3.08 years for the retroperitoneum/abdomen group. Significant overall survival differences were found between the retroperitoneum/abdomen group and each of the following groups: head/neck (P=0.001), upper limb (P<0.001), lower limb/hip (P<0.001), and pelvis (P=0.001). After adjusting for age, biological sex, race and ethnicity, Charlson-Deyo comorbidity index, and AJCC pathologic stage, a 48.4% increased risk of death was found for retroperitoneum/abdomen vs. lower limb/hip primary site (95% CI: 14.6% to 92.1%; P=0.003). Thorax/lung vs. lower limb/hip was also associated with a 55.1% increased risk of death (95% CI: 8.4% to 121.9%; P=0.016).

Conclusion: The current prognostic modality for pleomorphic liposarcoma is limited. There are statistically significant differences in survival based on primary anatomical sites, which may serve as a useful prognostic indicator. Tumors manifesting in the retroperitoneum/abdomen demonstrated the lowest survival.

Background: Pleomorphic liposarcomas is an aggressive, high grade subtype of soft tissue sarcoma representing < 15% of liposarcomas. It most commonly arises in the retroperitoneum and proximal upper extremities. Current prognostic factors are centered around staging, which accounts for the grade, size, and location of the tumor in relation to the superficial fascia.

Methods: A total of 1778 patients diagnosed with pleomorphic liposarcoma were identified in the National Cancer Database and stratified by primary anatomical site: head/neck, upper limb, lower limb/hip, thorax/lung, pelvis, and retroperitoneum/abdomen. Kaplan-Meier survival tables were produced to estimate 1-, 5-, and 10-year overall survival. Log-rank tests with a Bonferroni correction for multiple comparisons and a multivariable Cox proportional hazards analysis were utilized to compare the primary site groups; P < 0.05 was considered significant.

Results: The most common primary anatomical site was the lower limb/hip. The head/neck primary anatomical site demonstrated the highest 10-year overall survival probability, while retroperitoneum/abdomen had the lowest (50% and 18.4%, respectively). Median survival was 9.19 years for the head/neck group, and 3.08 years for the retroperitoneum/abdomen group. Significant overall survival differences were found between the retroperitoneum/abdomen group and each of the following groups: head/neck (P=0.001), upper limb (P<0.001), lower limb/hip (P<0.001), and pelvis (P=0.001). After adjusting for age, biological sex, race and ethnicity, Charlson-Deyo comorbidity index, and AJCC pathologic stage, a 48.4% increased risk of death was found for retroperitoneum/abdomen vs. lower limb/hip primary site (95% CI: 14.6% to 92.1%; P=0.003). Thorax/lung vs. lower limb/hip was also associated with a 55.1% increased risk of death (95% CI: 8.4% to 121.9%; P=0.016).

Conclusion: The current prognostic modality for pleomorphic liposarcoma is limited. There are statistically significant differences in survival based on primary anatomical sites, which may serve as a useful prognostic indicator. Tumors manifesting in the retroperitoneum/abdomen demonstrated the lowest survival.

Background: Pleomorphic liposarcomas is an aggressive, high grade subtype of soft tissue sarcoma representing < 15% of liposarcomas. It most commonly arises in the retroperitoneum and proximal upper extremities. Current prognostic factors are centered around staging, which accounts for the grade, size, and location of the tumor in relation to the superficial fascia.

Methods: A total of 1778 patients diagnosed with pleomorphic liposarcoma were identified in the National Cancer Database and stratified by primary anatomical site: head/neck, upper limb, lower limb/hip, thorax/lung, pelvis, and retroperitoneum/abdomen. Kaplan-Meier survival tables were produced to estimate 1-, 5-, and 10-year overall survival. Log-rank tests with a Bonferroni correction for multiple comparisons and a multivariable Cox proportional hazards analysis were utilized to compare the primary site groups; P < 0.05 was considered significant.

Results: The most common primary anatomical site was the lower limb/hip. The head/neck primary anatomical site demonstrated the highest 10-year overall survival probability, while retroperitoneum/abdomen had the lowest (50% and 18.4%, respectively). Median survival was 9.19 years for the head/neck group, and 3.08 years for the retroperitoneum/abdomen group. Significant overall survival differences were found between the retroperitoneum/abdomen group and each of the following groups: head/neck (P=0.001), upper limb (P<0.001), lower limb/hip (P<0.001), and pelvis (P=0.001). After adjusting for age, biological sex, race and ethnicity, Charlson-Deyo comorbidity index, and AJCC pathologic stage, a 48.4% increased risk of death was found for retroperitoneum/abdomen vs. lower limb/hip primary site (95% CI: 14.6% to 92.1%; P=0.003). Thorax/lung vs. lower limb/hip was also associated with a 55.1% increased risk of death (95% CI: 8.4% to 121.9%; P=0.016).

Conclusion: The current prognostic modality for pleomorphic liposarcoma is limited. There are statistically significant differences in survival based on primary anatomical sites, which may serve as a useful prognostic indicator. Tumors manifesting in the retroperitoneum/abdomen demonstrated the lowest survival.

Background: Liposarcoma is the most common malignant soft tissue sarcoma (STS). Surgical resection is the most utilized therapeutic option. In this study, we aim to explore the effects of varying degrees of surgical margins on survival in patients with dedifferentiated liposarcoma (DDLPS).

Methods: The National Cancer Database (NCDB) was used to select patients with DDLPS to determine if surgical margins and other variables were associated with decreased overall survival after accounting for age, gender, race, Charlson-Deyo score, anatomic site, treatment approach, tumor size, tumor grade, and presence of metastases through multivariable analysis.

Results: Of the 1004 selected patients, 64.4% were male, 87.0% were white, and the median age was 63 years. About 95% had no metastases at the time of diagnosis, and 91.5% had high grade liposarcoma. For the status of surgical margins, 50.8% had no residual tumors, 26.1% had microscopic residual tumors, 4.3% had macroscopic residual tumors. In general, the risk of death was higher for older males (25.8% increased risk of mortality) and those with metastases (312.9% increased risk of mortality) as well as patients with high grade liposarcoma (112.4% increased risk of mortality). Patients with macroscopic residual tumors in comparison to those with no residual tumors had a 96.7% increased risk of death (HR 95% CI:1.24 to 3.13; P=0.004).

Conclusion: Older age, presence of metastasis, male patients, retroperitoneal/abdomen primary site, highgrade tumors, and macroscopic or residual tumor present after surgery lead to an increased risk of mortality. These outcomes highlight the importance and benefits of negative or complete surgical margins as prognostic indicators for patients with DDLPS, especially considering that resection is the most commonly utilized therapeutic option. The NCDB contains about 70% of cancer incidents within the US, therefore a future study incorporating the Surveillance, Epidemiology, and End Results (SEER) registry could enhance and possibly add to the results brought forth by this study.

Background: Liposarcoma is the most common malignant soft tissue sarcoma (STS). Surgical resection is the most utilized therapeutic option. In this study, we aim to explore the effects of varying degrees of surgical margins on survival in patients with dedifferentiated liposarcoma (DDLPS).

Methods: The National Cancer Database (NCDB) was used to select patients with DDLPS to determine if surgical margins and other variables were associated with decreased overall survival after accounting for age, gender, race, Charlson-Deyo score, anatomic site, treatment approach, tumor size, tumor grade, and presence of metastases through multivariable analysis.

Results: Of the 1004 selected patients, 64.4% were male, 87.0% were white, and the median age was 63 years. About 95% had no metastases at the time of diagnosis, and 91.5% had high grade liposarcoma. For the status of surgical margins, 50.8% had no residual tumors, 26.1% had microscopic residual tumors, 4.3% had macroscopic residual tumors. In general, the risk of death was higher for older males (25.8% increased risk of mortality) and those with metastases (312.9% increased risk of mortality) as well as patients with high grade liposarcoma (112.4% increased risk of mortality). Patients with macroscopic residual tumors in comparison to those with no residual tumors had a 96.7% increased risk of death (HR 95% CI:1.24 to 3.13; P=0.004).

Conclusion: Older age, presence of metastasis, male patients, retroperitoneal/abdomen primary site, highgrade tumors, and macroscopic or residual tumor present after surgery lead to an increased risk of mortality. These outcomes highlight the importance and benefits of negative or complete surgical margins as prognostic indicators for patients with DDLPS, especially considering that resection is the most commonly utilized therapeutic option. The NCDB contains about 70% of cancer incidents within the US, therefore a future study incorporating the Surveillance, Epidemiology, and End Results (SEER) registry could enhance and possibly add to the results brought forth by this study.

Background: Liposarcoma is the most common malignant soft tissue sarcoma (STS). Surgical resection is the most utilized therapeutic option. In this study, we aim to explore the effects of varying degrees of surgical margins on survival in patients with dedifferentiated liposarcoma (DDLPS).

Methods: The National Cancer Database (NCDB) was used to select patients with DDLPS to determine if surgical margins and other variables were associated with decreased overall survival after accounting for age, gender, race, Charlson-Deyo score, anatomic site, treatment approach, tumor size, tumor grade, and presence of metastases through multivariable analysis.

Results: Of the 1004 selected patients, 64.4% were male, 87.0% were white, and the median age was 63 years. About 95% had no metastases at the time of diagnosis, and 91.5% had high grade liposarcoma. For the status of surgical margins, 50.8% had no residual tumors, 26.1% had microscopic residual tumors, 4.3% had macroscopic residual tumors. In general, the risk of death was higher for older males (25.8% increased risk of mortality) and those with metastases (312.9% increased risk of mortality) as well as patients with high grade liposarcoma (112.4% increased risk of mortality). Patients with macroscopic residual tumors in comparison to those with no residual tumors had a 96.7% increased risk of death (HR 95% CI:1.24 to 3.13; P=0.004).

Conclusion: Older age, presence of metastasis, male patients, retroperitoneal/abdomen primary site, highgrade tumors, and macroscopic or residual tumor present after surgery lead to an increased risk of mortality. These outcomes highlight the importance and benefits of negative or complete surgical margins as prognostic indicators for patients with DDLPS, especially considering that resection is the most commonly utilized therapeutic option. The NCDB contains about 70% of cancer incidents within the US, therefore a future study incorporating the Surveillance, Epidemiology, and End Results (SEER) registry could enhance and possibly add to the results brought forth by this study.

Background: Within melanoma, comorbidity is associated with delayed diagnosis, advanced stage, and less aggressive treatment. Using the National Cancer Database (NCDB), this is the largest study to determine the influence of comorbidity (Charlson-Deyo) on receipt of adjuvant immunotherapy and survival in stage III melanoma.

Methods: We identified 10,739 patients with stage III melanoma between 2006-2012, for which high dose interferon was the standard adjuvant treatment. The probability of receipt was estimated using multivariable marginal logistic regression model, whereas survival was estimated using both the Kaplan-Meier method and multivariable marginal Cox regression model. Multivariable models adjusted for patient and facility-level characteristics.

Results: Greater receipt of adjuvant immunotherapy was observed in patients with fewer comorbidities (28.2%, 23.6%, and 13.8%, respectively, for 0, 1, and 2 or more comorbidities; P < .001). Patients with two or more comorbid conditions had a 44.0% lower adjusted odds of receiving adjuvant immunotherapy relative to patients with none (P < .001), and 45.5% lower adjusted odds relative to 1 comorbidity (P < .001). Regarding survival estimates, patients receiving adjuvant immunotherapy had significantly longer survival with fewer than 2 comorbid conditions (both P < .001); no difference was observed in patients with 2 or more (P = .077). In patients with no comorbidities, at 5-years postdiagnosis, 60.4% of those receiving adjuvant immunotherapy were alive compared to 49.8% of those who did not. In patients with 1 comorbid condition, 51.3% of those receiving adjuvant immunotherapy were alive compared to 37.7% of those who did not. The adjusted risk of death in patients who received adjuvant immunotherapy was not moderated by the number of comorbidities (χ2 = 0.51, P = .775). As such, the 20.4% lower risk of death favoring patients who received adjuvant immunotherapy (P < .001) was constant across different numbers of comorbidities. Lower risk of death and receipt of adjuvant immunotherapy were observed in younger patients with private insurance.

Conclusions: Risk of death findings suggest that adjuvant immunotherapy works equally well across numbers of comorbidities, despite a decrease in receipt with greater comorbidity. Additionally, overall survival findings support this in patients with 1 comorbidity.

Background: Within melanoma, comorbidity is associated with delayed diagnosis, advanced stage, and less aggressive treatment. Using the National Cancer Database (NCDB), this is the largest study to determine the influence of comorbidity (Charlson-Deyo) on receipt of adjuvant immunotherapy and survival in stage III melanoma.

Methods: We identified 10,739 patients with stage III melanoma between 2006-2012, for which high dose interferon was the standard adjuvant treatment. The probability of receipt was estimated using multivariable marginal logistic regression model, whereas survival was estimated using both the Kaplan-Meier method and multivariable marginal Cox regression model. Multivariable models adjusted for patient and facility-level characteristics.

Results: Greater receipt of adjuvant immunotherapy was observed in patients with fewer comorbidities (28.2%, 23.6%, and 13.8%, respectively, for 0, 1, and 2 or more comorbidities; P < .001). Patients with two or more comorbid conditions had a 44.0% lower adjusted odds of receiving adjuvant immunotherapy relative to patients with none (P < .001), and 45.5% lower adjusted odds relative to 1 comorbidity (P < .001). Regarding survival estimates, patients receiving adjuvant immunotherapy had significantly longer survival with fewer than 2 comorbid conditions (both P < .001); no difference was observed in patients with 2 or more (P = .077). In patients with no comorbidities, at 5-years postdiagnosis, 60.4% of those receiving adjuvant immunotherapy were alive compared to 49.8% of those who did not. In patients with 1 comorbid condition, 51.3% of those receiving adjuvant immunotherapy were alive compared to 37.7% of those who did not. The adjusted risk of death in patients who received adjuvant immunotherapy was not moderated by the number of comorbidities (χ2 = 0.51, P = .775). As such, the 20.4% lower risk of death favoring patients who received adjuvant immunotherapy (P < .001) was constant across different numbers of comorbidities. Lower risk of death and receipt of adjuvant immunotherapy were observed in younger patients with private insurance.

Conclusions: Risk of death findings suggest that adjuvant immunotherapy works equally well across numbers of comorbidities, despite a decrease in receipt with greater comorbidity. Additionally, overall survival findings support this in patients with 1 comorbidity.

Background: Within melanoma, comorbidity is associated with delayed diagnosis, advanced stage, and less aggressive treatment. Using the National Cancer Database (NCDB), this is the largest study to determine the influence of comorbidity (Charlson-Deyo) on receipt of adjuvant immunotherapy and survival in stage III melanoma.

Methods: We identified 10,739 patients with stage III melanoma between 2006-2012, for which high dose interferon was the standard adjuvant treatment. The probability of receipt was estimated using multivariable marginal logistic regression model, whereas survival was estimated using both the Kaplan-Meier method and multivariable marginal Cox regression model. Multivariable models adjusted for patient and facility-level characteristics.

Results: Greater receipt of adjuvant immunotherapy was observed in patients with fewer comorbidities (28.2%, 23.6%, and 13.8%, respectively, for 0, 1, and 2 or more comorbidities; P < .001). Patients with two or more comorbid conditions had a 44.0% lower adjusted odds of receiving adjuvant immunotherapy relative to patients with none (P < .001), and 45.5% lower adjusted odds relative to 1 comorbidity (P < .001). Regarding survival estimates, patients receiving adjuvant immunotherapy had significantly longer survival with fewer than 2 comorbid conditions (both P < .001); no difference was observed in patients with 2 or more (P = .077). In patients with no comorbidities, at 5-years postdiagnosis, 60.4% of those receiving adjuvant immunotherapy were alive compared to 49.8% of those who did not. In patients with 1 comorbid condition, 51.3% of those receiving adjuvant immunotherapy were alive compared to 37.7% of those who did not. The adjusted risk of death in patients who received adjuvant immunotherapy was not moderated by the number of comorbidities (χ2 = 0.51, P = .775). As such, the 20.4% lower risk of death favoring patients who received adjuvant immunotherapy (P < .001) was constant across different numbers of comorbidities. Lower risk of death and receipt of adjuvant immunotherapy were observed in younger patients with private insurance.

Conclusions: Risk of death findings suggest that adjuvant immunotherapy works equally well across numbers of comorbidities, despite a decrease in receipt with greater comorbidity. Additionally, overall survival findings support this in patients with 1 comorbidity.