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Unusual Malignant Solid Neoplasms of the Kidney: Cross-Sectional Imaging Findings.

Karaosmano─člu AD, Onur MR, Shirkhoda A, Ozmen M, Hahn PF - Korean J Radiol (2015)

Bottom Line: Malignant kidney neoplasms are the most frequently encountered solid kidney masses.Although renal cell carcinoma is the major renal malignancy, other solid malignant renal masses should be considered in the differential diagnosis of solid renal masses that do not contain a macroscopic fatty component.In this pictorial essay, we present the imaging findings of a primitive neuroectodermal tumor, primary liposarcoma of the kidney, primary neuroendocrine tumor, leiomyosarcoma, synovial sarcoma, malignant fibrous histiocytoma, sclerosing fibrosarcoma and renal metastasis of osteosarcoma.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.

ABSTRACT
Malignant kidney neoplasms are the most frequently encountered solid kidney masses. Although renal cell carcinoma is the major renal malignancy, other solid malignant renal masses should be considered in the differential diagnosis of solid renal masses that do not contain a macroscopic fatty component. In this pictorial essay, we present the imaging findings of a primitive neuroectodermal tumor, primary liposarcoma of the kidney, primary neuroendocrine tumor, leiomyosarcoma, synovial sarcoma, malignant fibrous histiocytoma, sclerosing fibrosarcoma and renal metastasis of osteosarcoma.

No MeSH data available.


Related in: MedlinePlus

Renal synovial sarcoma.Axial T1- (A) and T2-weighted (B) magnetic resonance image (MRI) demonstrate right renal mass with low signal-intensity and solid (arrows) and high signal-intensity cystic (arrowheads) components. High signal intensity in cystic portion of mass represents hemorrhagic or protein rich fluid. C. Coronal T2-weighted MRI reveals right renal mass (arrow) with peripheral cystic portion. D. Axial fat-saturated T1-weighted MRI demonstrates enhancement of solid portion (arrow) of renal synovial sarcoma.
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Figure 5: Renal synovial sarcoma.Axial T1- (A) and T2-weighted (B) magnetic resonance image (MRI) demonstrate right renal mass with low signal-intensity and solid (arrows) and high signal-intensity cystic (arrowheads) components. High signal intensity in cystic portion of mass represents hemorrhagic or protein rich fluid. C. Coronal T2-weighted MRI reveals right renal mass (arrow) with peripheral cystic portion. D. Axial fat-saturated T1-weighted MRI demonstrates enhancement of solid portion (arrow) of renal synovial sarcoma.

Mentions: Primary synovial sarcoma of the kidney is an extremely rare tumor. They tend to be large masses with a mean size of 8 cm (17). Renal synovial sarcomas manifest as a hypoechoic mass arising from the kidney on US. Synovial sarcoma of the kidney presents as a soft tissue mass with multiple cystic areas (Fig. 5) (3). They are usually well-demarcated, and cross-sectional imaging studies demonstrate an oval shaped, well-defined heterogeneously enhancing mass (1718). Small synovial sarcomas of the kidney usually have homogeneous signal intensity, similar to that of skeletal muscle on T1-weighted images. Synovial sarcomas > 5 cm can show heterogeneous signal intensity due to intralesional hemorrhage and necrosis (Fig. 5) (19). The cystic components of synovial sarcoma often have smooth walls unlike cystic RCCs, which usually have a mural nodule. Subcapsular hematoma secondary to tumor rupture may occur in patients with synovial sarcoma of the kidney (18).


Unusual Malignant Solid Neoplasms of the Kidney: Cross-Sectional Imaging Findings.

Karaosmano─člu AD, Onur MR, Shirkhoda A, Ozmen M, Hahn PF - Korean J Radiol (2015)

Renal synovial sarcoma.Axial T1- (A) and T2-weighted (B) magnetic resonance image (MRI) demonstrate right renal mass with low signal-intensity and solid (arrows) and high signal-intensity cystic (arrowheads) components. High signal intensity in cystic portion of mass represents hemorrhagic or protein rich fluid. C. Coronal T2-weighted MRI reveals right renal mass (arrow) with peripheral cystic portion. D. Axial fat-saturated T1-weighted MRI demonstrates enhancement of solid portion (arrow) of renal synovial sarcoma.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4499550&req=5

Figure 5: Renal synovial sarcoma.Axial T1- (A) and T2-weighted (B) magnetic resonance image (MRI) demonstrate right renal mass with low signal-intensity and solid (arrows) and high signal-intensity cystic (arrowheads) components. High signal intensity in cystic portion of mass represents hemorrhagic or protein rich fluid. C. Coronal T2-weighted MRI reveals right renal mass (arrow) with peripheral cystic portion. D. Axial fat-saturated T1-weighted MRI demonstrates enhancement of solid portion (arrow) of renal synovial sarcoma.
Mentions: Primary synovial sarcoma of the kidney is an extremely rare tumor. They tend to be large masses with a mean size of 8 cm (17). Renal synovial sarcomas manifest as a hypoechoic mass arising from the kidney on US. Synovial sarcoma of the kidney presents as a soft tissue mass with multiple cystic areas (Fig. 5) (3). They are usually well-demarcated, and cross-sectional imaging studies demonstrate an oval shaped, well-defined heterogeneously enhancing mass (1718). Small synovial sarcomas of the kidney usually have homogeneous signal intensity, similar to that of skeletal muscle on T1-weighted images. Synovial sarcomas > 5 cm can show heterogeneous signal intensity due to intralesional hemorrhage and necrosis (Fig. 5) (19). The cystic components of synovial sarcoma often have smooth walls unlike cystic RCCs, which usually have a mural nodule. Subcapsular hematoma secondary to tumor rupture may occur in patients with synovial sarcoma of the kidney (18).

Bottom Line: Malignant kidney neoplasms are the most frequently encountered solid kidney masses.Although renal cell carcinoma is the major renal malignancy, other solid malignant renal masses should be considered in the differential diagnosis of solid renal masses that do not contain a macroscopic fatty component.In this pictorial essay, we present the imaging findings of a primitive neuroectodermal tumor, primary liposarcoma of the kidney, primary neuroendocrine tumor, leiomyosarcoma, synovial sarcoma, malignant fibrous histiocytoma, sclerosing fibrosarcoma and renal metastasis of osteosarcoma.

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA.

ABSTRACT
Malignant kidney neoplasms are the most frequently encountered solid kidney masses. Although renal cell carcinoma is the major renal malignancy, other solid malignant renal masses should be considered in the differential diagnosis of solid renal masses that do not contain a macroscopic fatty component. In this pictorial essay, we present the imaging findings of a primitive neuroectodermal tumor, primary liposarcoma of the kidney, primary neuroendocrine tumor, leiomyosarcoma, synovial sarcoma, malignant fibrous histiocytoma, sclerosing fibrosarcoma and renal metastasis of osteosarcoma.

No MeSH data available.


Related in: MedlinePlus