Microscopy * Vascular appearance of tumor * Hypocellular mesenchymal lesion * Spindled and stellate cells with an ill-defined cytoplasm * Cells loosely scattered in a myxoid stroma * No evidence of nuclear atypia and mitosis * Numerous, thin-to-thick wall vessels of different sizes * Myxoid, hypocellular background * Bland cytological appearance of spindle cells Microscopical views File:Aggressive<unk> .jpg File:Aggressive<unk>  2.jpg File:Aggressive<unk>  6.jpg File:Aggressive<unk>  humpath 8.jpg File:Aggressive<unk>  - high mag.jpg Immunochemistry Immunohistochemical studies show strong staining for desmin, estrogen receptors, and progesterone receptors. Staining for actin, CD34 and smooth muscle actin are intermediate. Staining for S-100 protein is negative.
Aggressive angiomyxoma
Neural fibrolipoma
Littoral cell angioma
Eccrine angiomatous hamartoma
Malignant chondroid syringoma
Esthesioneuroblastoma
Cellular angiofibroma
Hamartoma