PMC7136787_01
The tumor predominantly consists of signet ring cells floating in mucinous substance (hematoxylin and eosin staining; magnification: (a) x40 and (b, c) x200).
CRIPA2020-2134546.001.jpg
PMC7136787_01_CRIPA2020-2134546.001.jpg
fig1
Histologically, most of the mass was composed of single or clusters of signet ring cells arranged in small groups or individual cells admixed with abundant extracellular mucin (Figure 1).
(a) Brenner tumor component from low power (x20 magnification; H&E stain). (b) Benign Brenner tumor lined with transitional epithelium in a fibrous stroma (x200 magnification; H&E stain). (c) Malignant Brenner tumor invading adjacent stroma (x200 magnification; H&E stain).
CRIPA2020-2134546.002.jpg
PMC7136787_01_CRIPA2020-2134546.002.jpg
fig2
This was consistent with presence of both benign and malignant components of a Brenner tumor (Figure 2).