Abstract:
:In a case of metanephric adenoma of the kidney, many apical cytoplasmic blebs were found on the luminal surface of tumor cells. The tumor, measuring 15 mm in diameter, was found incidentally in the right kidney of a 40-year-old woman. It consisted of a dense proliferation of cuboidal cells forming small tubules of round or irregular shape. The apical portion of the cytoplasm of tumor cells exhibited club-shaped expansion or dome-like protrusion which was largely occupied by numerous free ribosomes. The neck portion of the protruded apical cytoplasm was constricted, and the apical cytoplasm appeared to have been "pinched-off" and shed into the lumen. The prominent formation of apical cytoplasmic blebs has, to our knowledge, not been documented in renal tumors except in angiomyoadenomatous tumors. Its pathological significance is unknown, but it most likely represents a response of tumor cells to some hypoxic or toxic cellular injuries.
journal_name
Med Mol Morpholjournal_title
Medical molecular morphologyauthors
Shintaku M,Maeno Kdoi
10.1007/s00795-015-0124-1subject
Has Abstractpub_date
2016-03-01 00:00:00pages
57-61issue
1eissn
1860-1480issn
1860-1499pii
10.1007/s00795-015-0124-1journal_volume
49pub_type
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