Keywords:
Cancer, Diagnostic procedure, MR, CT, Musculoskeletal soft tissue
Authors:
G. S. Andrade1, P. T. R. Marques2, S. Ferreira2; 1Amadora/PT, 2Lisboa/PT
DOI:
10.26044/essr2019/P-0126
Imaging findings OR Procedure Details
In this work,
we present a pictorial review of lesions mimicking soft-tissue malignant tumors and review imaging findings that may help guiding the differential diagnosis,
using relevant examples of the daily practice in our institution.
Soft-tissue Pseudosarcomas are benign soft-tissue lesions that can be mistaken for malignancies and should be in the differential diagnosis when considering a sarcomatous etiology.
Some of these entities have a characteristic appearence or location that the radiologist must be aware of. They may have a neoplastic (e.g. myxoma) or non-neoplastic origin (e.g.
hematomas).
Soft-tissue tumors arise from the mesenchyme, which differentiates to become fat, skeletal muscle, peripheral nerves, blood vessels and fibrous tissue.
Soft-tissue tumors are classified based on WHO classification 2013 (figure 1).
Cross-sectional techniques provide good definition of soft-tissue tumors,
being MRI the best imaging modality for their characterization.
Most soft-tissue tumors haver a non-specific appareance on MRI.