PMC5943109_01
Ultrasound demonstrated a 18 mmx13 mm mass, hypoechoic group in its center with blurred boundaries, a homogeneous internal echo, and a significantly attenuated rear echo.
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F1
Color Doppler ultrasound revealed echo of a mammary gland-like structure visible on the left armpit with a size of about 18 mm x 13 mm hypoechoic group in its center with blurred boundaries, a homogeneous internal echo, and a significantly attenuated rear echo (Fig. 1).
CDFI showing arterial blood flow signals at the edge of the hypoechoic group. CDFI = color Doppler flow imaging, GCT = granular cell tumor.
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F2
In addition, color Doppler flow imaging (CDFI) showed a small number of arterial blood flow signals at the edge of the hypoechoic group (Fig. 2).
Gross pathology of the left armpit mass.
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F3
The cross section showed the mass itself was 2 x 2 x 1.5 cm, grayish white and of a hard texture (Fig. 3).
Polygonal cell nests divided by fibrous tissue typical for GCT. GCT = granular cell tumor.
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F4
Postoperative pathology reported GCT of axillary accessory breast (Fig. 4), with tumor-free margins.