PMC9842874_01
(A) Pelvic magnetic resonance imaging (MRI) revealed a fatty, heterogeneously enhancing mass in the subserosal layer of the anterior wall of the uterine body. (B) Pelvic magnetic resonance imaging (MRI) showed a fatty, heterogeneously enhancing mass in the subserosal layer of the anterior wall of the uterine body. (C) Macroscopic findings of uterine lipoleiomyoma. Well-circumscribed encapsulated mass. (D) Cut section of the uterine lipoleiomyoma shows yellowish-white areas.
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Pelvic MRI revealed a fatty, heterogeneously enhancing subserosal mass in the anterior wall of the uterine body (Figure 1A,B). Grossly, the tumor was well-circumscribed and measured 4 x 3 x 2.5 cm (Figure 1C). On cut section, it showed a yellowish-white cut surface (Figure 1D).
(A) Lipoleiomyoma characterized by bundles of fusiform smooth muscle cells admixed with mature fat cells (Hematoxylin and eosin, magnification 100x). (B) Smooth muscle cell proliferation admixed with mature adipocytes (Hematoxylin and eosin, magnification 200x). (C) Smooth muscle cells with elongated nuclei without nuclear atypia and mature adipocytes (hematoxylin and eosin, magnification 400x). (D) Immunohistochemistry demonstrating staining of the spindle cells with Desmin (brown staining) (immunohistochemistry, magnification 200x).
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Histological examination of the nodule revealed a benign mesenchymal proliferation made of spindle-shaped smooth muscle cells arranged in a whorled pattern intermingled with mature adipocytes (Figure 2A-C). An Immunohistochemical study showed positive staining of the spindle-shaped smooth muscle cells with Desmin (Figure 2D).