Definition
Renal cell tumor characterized by tubular formations merging with bland spindle cells in a myxoid stroma.
Clinical Features
Incidence
This tumor accounts for less than 1% of all renal neoplasms.
Age
It arises during the sixth decade of live.
Sex
There is a female predilection (M:F = 1:3).
Site
There is no site predilection.
Treatment
Partial or radical nephrectomy is the treatment of choice.
Outcome
Only rare cases have metastasized to lymph nodes and have shown sarcomatoid dedifferentiation.
Macroscopy
The tumor is solid, pale tan to yellow that may have slight focal areas of necrosis or hemorrhage.
Microscopy
Mucinous tubular and spindle cell carcinoma is circumscribed and composed of branching, elongated tubules in a bubbly, basophilic, myxoid stroma (Fig. 1). Tumor cells are predominantly cuboidal with scant, clear to pale, acidophilic cytoplasms and low-grade nucleolar features (Ferlicot et al. 2005).
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Cossu-Rocca, P., Eble, J. N., Delahunt, B., et al. (2006). Renal mucinous tubular and spindle carcinoma lacks the gains of chromosomes 7 and 17 and losses of chromosome Y that are prevalent in papillary renal cell carcinoma. Modern Pathology, 19, 488–493.
Ferlicot, S., Allory, Y., Compérat, E., et al. (2005). Mucinous tubular and spindle cell carcinoma: A report of 15 cases and a review of the literature. Virchows Archiv, 447, 978–983.
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Caliò, A., Segala, D., Martignoni, G. (2020). Renal Mucinous Tubular and Spindle Cell Carcinoma. In: Raspollini, M.R., Lopez-Beltran, A. (eds) Uropathology. Encyclopedia of Pathology. Springer, Cham. https://doi.org/10.1007/978-3-030-41894-6_4926
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DOI: https://doi.org/10.1007/978-3-030-41894-6_4926
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