Surgical Pathology Criteria

Lipoma

Variant: Myelolipoma

Diagnostic Criteria

Differential Diagnosis

Extramedullary Hematopoeisis Myelolipoma
Poorly circumscribed Circumscribed
Overrun fat Fat integral to tumor
No prominent lymphoid component Lymphocytes may be prominent
Hematologic abnormalities associated No hematologic abnormalities

Lipoblastoma with Extramedullary Hematopoiesis Myelolipoma
Immature fat cells present No immature fat cells
Areas with vascular myxoid stroma Lacks vascular myxoid stroma
Usually under age 10, virtually always under 20 Usually over age 40

Clinical

Bibliography

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