PMC8077616_01
a Neck CT scan with contrast axial cut, soft tissue window: tumor of the parotid gland. b Neck CT scan with contrast axial cut, sof tissue window: enlarged lymph nodes.
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F1
MRI of the neck region showed tumor in the parotid gland that took up most of the gland and enlarged lymph nodes in the II, III, and VA group on the right side, shown in Figure 1, and a few enlarged lymph nodes on the opposite side (shorter diameter up to 10 mm).
Salivary duct carcinoma, micropapillary type. HE. x5.
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F2
Pathology report concluded that it was a G3 (poorly differentiated) SDC (micropapillary variant) with lymphovascular and perineural invasion, shown in Figure 2.
a ICH, AR focal nuclear staining in tumor cells. x5. b ICH, GCDFP 15 focal cytoplasm staining in tumor cells. x10. c Histology grade 3. HE. x20. d ICH HER 2, diffuse strong membranes staining in tumor cells (3+). x10.
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F3
TTF1, shown in Figure 3.