Abstract
Background We have described an unusual sinonasal neoplasm which is a histological mimic of renal cell carcinoma (RCC) and coined the nosological classification “sinonasal renal cell-like adenocarcinoma” (SRCLA) to describe this unusual entity. Since the original description (Zur et al. Otolaryngol Head Neck Surg 128:441–7, 2002), we have reviewed the case reported by Moh’d Hadi et al. (Rhinology 40:44–7, 2002) and have seen two new cases in consultation. Our purpose here is to describe the additional cases and to extend the reported outcome for these patients. Design Four patients were identified. Slides and immunohistochemistry results were reviewed in consultation. Updated clinical follow-up was obtained from the respective clinicians. Results This group consisted of three women, one man, 22–69 years, and mean 46. Three tumors were in the nasal cavity and one was in the nasopharynx. Histologically, these tumors were uniformly composed of clear cells, forming either solid or glandular patterns. The tumor cells were cuboidal to polyhedral; transition to short spindle cells was seen in one case. One case revealed moderate nuclear pleomorphism. No perineural or vascular invasion, or necrosis was seen. No mucin-producing or squamous elements were seen. Immunohistochemistry (IHC) revealed the following staining profile: CK7 + (4/4), CK20 + (focal 1/4), S100 + (1/4), and CD10 + (1/2). No staining was seen for vimentin (0/4), RCC (0/2), thyroglobulin (0/2), actin (0/2), or calponin (0/2). Three patients were treated primarily with surgery, two patients also received adjuvant radiotherapy (RT); the fourth patient was treated with primary RT. All patients are disease-free, based on endoscopy and/or radiography, 2, 4, 5 and 8 years after diagnosis. Renal cell carcinoma has not been identified in any patient. Conclusion Sinonasal renal cell-like adenocarcinoma is a rare and distinct entity noteworthy in its resemblance to RCC. Immunohistochemistry can easily distinguish between these two tumors. No patient developed recurrent or metastatic disease, or was found to have RCC. Greater experience will allow us to fully understand its long-term behavior and arrive at more standardized therapeutic recommendations.
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Storck, K., Hadi, U.M., Simpson, R. et al. Sinonasal Renal Cell-like Adenocarcinoma: A Report on Four Patients. Head and Neck Pathol 2, 75–80 (2008). https://doi.org/10.1007/s12105-008-0047-4
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DOI: https://doi.org/10.1007/s12105-008-0047-4