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General
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Epidemiology
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Sites
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Etiology, Pathophysiology and molecular genetics
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Clinical features
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Diagnosis
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Laboratory
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Prognostic factors
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Case reports
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Treatment
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Clinical images
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Non-homogeneous scrotal mass

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No tissue infiltration

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Large heterogenous extra-testicular mass

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Scrotal mass at presentation

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Tumor after chemotherapy

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CT of paratesticular
liposarcoma presenting as hernia

Gross description
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Gross images
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Tumor mass

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Yellowish and myxoid areas

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White-yellow to red-brown cut surfaces, marked necrosis

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Paratesticular mass
with solid, yellow-white,
fatty, myxoid areas

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Grossly firm tumor

Micro description
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Micro images
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Well differentiated liposarcoma
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Atypical spindle cells and lipoblasts

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Mature adipocytes and lipoblasts



Well differentiated with dedifferentiated component
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Hypercellular stroma with atypical adipocytes

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Atypical adipocytes with enlarged nuclei

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Dedifferentiated liposarcoma



Dedifferentiated with leiomyosarcomatous component
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H&E

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MDM2+, CDK4+,
alpha smooth muscle actin+, desmin+



Myxoid liposarcoma
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Lipoblasts contain lipid vacuoles

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Plexiform arrangement of capillaries

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Various images



Positive stains
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Negative stains
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Differential diagnosis
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Additional references
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End of Testis and epididymis > Paratesticular tumors > Liposarcoma



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