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- W1987996952 abstract "We report 2 seminomas with conspicuous numbers of signet ring cells. The tumors occurred in men, 24 and 69 years of age, who presented with testicular masses; 1 seminoma was a component of a mixed germ cell tumor and the other was pure. The signet ring cells occurred in a multifocal fashion in areas of otherwise typical seminoma and comprised approximately 70% and 10%, respectively, of the tumors. They had large, translucent to clear cytoplasmic vacuoles that compressed the nuclei to a peripheral crescent. In 1 case, the vacuoles contained numerous refractile, nonpolarizable globular deposits that were shown to be glycogen on the basis of periodic acid-Schiff stain positivity that was abolished by pretreatment with diastase; in the second case, they mostly appeared empty and lacked periodic acid-Schiff positivity. The signet ring cells were mucicarmine, cytokeratin (AE1/3) and alpha-fetoprotein negative, but positive for OCT3/4 and CD117, the latter 2 being expected for seminoma cells. A review of 30 randomly selected seminomas identified very rare, inconspicuous signet ring cells in 43%. The presence of prominent signet ring cells in seminoma may cause confusion as it has not been described previously in detail, and a variety of neoplasms, particularly metastasis, may be considered. The description of this phenomenon expands the known morphologic spectrum of the most common testicular neoplasm." @default.
- W1987996952 created "2016-06-24" @default.
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- W1987996952 date "2008-08-01" @default.
- W1987996952 modified "2023-09-25" @default.
- W1987996952 title "Seminoma With Conspicuous Signet Ring Cells: A Rare, Previously Uncharacterized Morphologic Variant" @default.
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- W1987996952 doi "https://doi.org/10.1097/pas.0b013e31816597b0" @default.
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