In this study the histologic grade of dedifferentiated liposarcomas was correlated with outcome in surgically resected specimens in 55 patients over a 19-year period at the University of Pittsburgh Medical Center. The tumors were located in the retroperitoneum (N=34); the extremities and thigh (N=16), and the remainder involved the spermatic cord and head and neck. Most tumors were large (mean=21 cm.) Follow up was available in all 55 patients (median=36months). Forty-one tumors classified as high-grade dedifferentiated liposarcoma (HG-DDLPS) had mitotically active pleomorphic and spindle cells and foci of necrosis. They included tumors with foci of smooth muscle differentiation (N=12), osteosarcoma (N=4), and myxoid areas (N=9). Fourteen tumors classified as low-grade dedifferentiated liposarcoma (LG-DDLPS) displayed a predominantly bland, monomorphic, spindle cell population with few mitoses and scant necrosis. The Kaplan-Meier method and log rank test were used for statistical analysis. All tumors had unequivocal foci of well-differentiated liposarcoma (WDLPS). Fluorescence in situ hybridization (FISH) detected amplification of MDM2 in 29 cases. Twenty of 41 patients (49%) with HG-DDLPS died of tumor, and two patients died with LG-DDLPS (14%). The overall survival of patients with LG-DDLPS was significantly longer (P=.02). The median survival was 113months for the LGDDLPS and 48months for the HGDDLPS. Metastases (N=4) occurred only in the high-grade tumors and were independent of the type of heterologous differentiation. Patients with HG-DDLPS were at a greater risk of earlier death. Distinction between the two groups is important for patient selection for possible adjuvant therapy.
This research output has an Altmetric Attention Score of 7. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 03 October 2017.
All research outputs
#5,407,105
of 25,382,440 outputs
Outputs from Human Pathology
#663
of 3,382 outputs
Outputs of similar age
#89,349
of 321,682 outputs
Outputs of similar age from Human Pathology
#46
of 75 outputs
Altmetric has tracked 25,382,440 research outputs across all sources so far. Compared to these this one has done well and is in the 78th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 3,382 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.1. This one has done well, scoring higher than 80% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 321,682 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 72% of its contemporaries.
We're also able to compare this research output to 75 others from the same source and published within six weeks on either side of this one. This one is in the 37th percentile – i.e., 37% of its contemporaries scored the same or lower than it.
