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===Microscopic=== | ===Microscopic=== | ||
Features: | Features:<ref name=pmid22885379/> | ||
*Like [[clear cell carcinoma]] elsewhere: | *Like [[clear cell carcinoma]] elsewhere: | ||
**Clear cytoplasm - '''key feature'''. | **Clear cytoplasm - '''key feature'''. | ||
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**Cells have large free/luminal surface area (hobnailing pattern) and small non-free surface. | **Cells have large free/luminal surface area (hobnailing pattern) and small non-free surface. | ||
**Moderate-to-severe [[nuclear pleomorphism]]. | **Moderate-to-severe [[nuclear pleomorphism]]. | ||
**Tubular and/or cystic morphology. | |||
***May be (simple) papillary and/or solid. | |||
*Adenosis - typically adjacent. | |||
DDx: | DDx: |
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