Dedifferentiated liposarcoma of the musculoskeletal system: expanded MR imaging spectrum from predominant fatty mass to non-fatty mass.

CONCLUSION: Dedifferentiated liposarcoma lesions showed a diverse spectrum of MRI findings. Although the presence of a non-fatty region within or adjacent to a well-defined fatty mass can suggest dedifferentiated liposarcoma, non-fatty masses without a fatty component were frequent on MRI. PMID: 30907094 [PubMed - as supplied by publisher]
Source: Acta Radiologica - Category: Radiology Authors: Tags: Acta Radiol Source Type: research

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We present a case of a 57-year-old white female with a left upper thigh mass located at the previous surgical site of the resection of a 15 cm, 505-glipoma 10 years ago. Magnetic resonance imaging showed a 1.7 × 3.1 × 2.9 cm soft tissue mass within the subcutaneous adipose tissues of her left upper thigh at the site of previous lipoma resection. No muscle or bone invasion was identified. The clinical impression was lipoma versus liposarcoma. The mass was surgically removed, and gross examination showed a tan-pink, well-demarcated soft mass with scalloped edges noted within the...
Source: Human Pathology: Case Reports - Category: Pathology Source Type: research
ConclusionMLL remains to be underdiagnosed. Due to the obesity epidemic, clinicians must be aware of this once rare disease. The role of concurrent bariatric surgery with surgical resection of MLL warrants further studies.
Source: Annals of Medicine and Surgery - Category: General Medicine Source Type: research
Rationale: Liposarcomas are locally invasive mesenchymal soft tissue tumors; most deep liposarcomas are large. Liposarcomas have heterogeneous histomorphology, molecular and genetic characteristics, and clinical prognosis, making the diagnosis and treatment of giant liposarcomas difficult for bone tumor surgeons. Patient concerns: A 70-year-old man presented with a mass in the posterior part of his left lower extremity that was first noticed 3 years prior. The mass was initially fist sized but continued to grow and had been affecting lower limb mobility on presentation. Diagnoses: Computed tomography and magnetic r...
Source: Medicine - Category: Internal Medicine Tags: Research Article: Clinical Case Report Source Type: research
ConclusionSystematic BMRI in MRCLS patients following treatment frequently identify extra-pulmonary metastasis in asymptomatic patients within the first 5 years of follow-up. Despite a long survival can be expected after diagnosis, extra-skeletal metastasis was a signal of disseminated disease.
Source: European Journal of Surgical Oncology (EJSO) - Category: Surgery Source Type: research
ConclusionThe diagnosis of liposarcoma with a lipomatous tumor is challenging, and resection should be considered for huge intra-abdominal lipomatous tumors.
Source: International Journal of Surgery Case Reports - Category: Surgery Source Type: research
Liposarcoma is the second most common malignant soft-tissue tumor. This entity is pathologically categorized into 4 subtypes: well-differentiated, myxoid, dedifferentiated and pleomorphic. Although features on magnetic resonance imaging and computed tomography for these 4 subtypes have been reported quite precisely, those on sonography have not been fully investigated. The present study was therefore aimed at clarifying the sonographic appearances of each liposarcoma subtype and assessing correlations with histopathology.
Source: Ultrasound in Medicine and Biology - Category: Radiology Authors: Tags: Clinical Note Source Type: research
Conclusion: Fat fraction on MRI corresponded to fat content on histology and therefore contributes to lesion characterization. Measurement repeatability was excellent for ADC; this parameter increased significantly post-radiotherapy even in disease categorized as stable by size criteria, and corresponded to cellularity on histology. ADC can be utilized for characterizing and assessing response in heterogeneous retroperitoneal sarcomas. Introduction Soft-tissue sarcomas are often highly heterogeneous tumors with variable components that can include cellular tumor, fat, necrosis, and cystic change. In many soft-tissue ...
Source: Frontiers in Oncology - Category: Cancer & Oncology Source Type: research
To evaluate if quantifying proton density fat fraction (PDFF) would be useful in separating lipoma, atypical lipomatous tumour (ALT) and liposarcoma in the extremities and trunk. In addition, differentiating ALT versus non-classical lipomas using magnetic resonance imaging (MRI)-based fatty acid composition (FAC) and three-dimensional (3D) texture analysis was tested.
Source: Clinical Radiology - Category: Radiology Authors: Source Type: research
We present the case of 33-year-old woman who presented with a palpable lump over superior aspect of her thigh associated with pain. Magnetic resonance imaging examination reported a “dumbbell”-shaped soft tissue tumor involving the right side of the pelvis and adductor compartment passing through the obturator foramen into the adductor compartment infiltrating the hip joint. Clinical and imaging features initially suggested liposarcoma, but ultrasound-guided biopsy and final surgical resection yielded the diagnosis of hibernoma. This rare soft tissue tumor can imitate malignancy, but magnetic resonance imaging ...
Source: Plastic and Reconstructive Surgery Global Open - Category: Cosmetic Surgery Tags: Case Report Source Type: research
ConclusionsSTIR sequences can be exclusively used during staging and screening of myxoid liposarcoma.
Source: Journal of Orthopaedics - Category: Orthopaedics Source Type: research
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