PMC9659604_01
(A) coronal (weighted-sequence T1), (B) axial (weighted-sequence T1), (C) sagittal (weighted-sequence T2), (D) axial (DWI), and (E) axial (ADC) MRI reveal a well-capsulated mass protruding into the left scrotum in the left pelvis (arrows). ADCmean value = 2.16 x 10-3 mm2/s. MRI, magnetic resonance imaging; DWI, diffusion-weighted imaging; ADC, apparent diffusion coefficient.
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F1
MRI at our hospital revealed a well-capsulated mass protruding into the left scrotum in the left pelvis with a size of 13.2 x 10.0 x 4.3 cm (Figure 1).
(A) A grey-pink or grey-yellow, well-circumscribed, solid mass measuring 13.0 x 7.0 x 5.5 cm. (B) Microscopic sections demonstrate a spindle cell tumor entrapping the adipose tissue (hematoxylin and eosin [H&E] stain, x100 magnification). (C) The tumor comprises spindle cells in a loose myxoid matrix containing irregular, variably sized blood vessels and cordlike collagen fibers (H&E stain, x100 magnification). (D) The tumor cells are eosinophilic, small, and spindle shaped, with slightly deep staining and stellate nuclei (H&E stain, x200 magnification).
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F2
The gross examination of the excisional biopsy revealed a grey-pink or grey-yellow mass measuring 13.0 x 7.0 x 5.5 cm in volume, with a completely smooth capsule on the surface and soft and translucent texture in tissue sections (Figure 2A). The spindle cells were arranged in a wavy or parallel pattern, with no atypia or nuclear division (Figures 2B-D).
The tumor cells are positive for (A) CD34, (B) desmin, (C) estrogen receptor (ER), and (D) progesterone receptor (PR) (immunohistochemical stain, x200 magnification).
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F3
Immunohistochemical staining revealed that the tumor cells were positive for vimentin, CD34 (Figure 3A), desmin (Figure 3B), estrogen receptor (ER) (Figure 3C), and progesterone receptor (PR) (Figure 3D) but negative for CK, SMA, and S-100.