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Radical nephrectomy performed for renal inflammatory myofibroblastic tumor in an elderly femaleRare Kidney Tumor Treated Successfully With Surgery Alone

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Key Takeaway
Consider radical nephrectomy for localized renal inflammatory myofibroblastic tumor based on a single case with short-term follow-up.

This retrospective case report describes an elderly female patient who underwent radical right nephrectomy for a renal inflammatory myofibroblastic tumor. The diagnosis was confirmed by histopathological evaluation. The primary outcome was the diagnosis of the tumor, and secondary outcomes were local recurrence and distant metastasis.

At 3- and 6-month postoperative follow-up visits, there was no evidence of local recurrence or distant metastasis. The study did not report any adverse events, serious adverse events, discontinuations, or tolerability data.

Key limitations include that this is a single patient case and a retrospective analysis. The practice relevance notes that complete surgical resection, preferably radical nephrectomy, is the treatment of choice for localized renal inflammatory myofibroblastic tumor. However, the causality note states this is a case report with no causal inference, and the certainty note indicates findings are based on a single case and are not generalizable. Clinicians should not infer broader efficacy of nephrectomy for renal IMT or speculate on long-term outcomes beyond 6 months.

A rare type of kidney tumor called an inflammatory myofibroblastic tumor was successfully removed from an elderly woman through a radical nephrectomy — complete removal of the kidney. At her 3- and 6-month follow-up visits, there was no sign of the tumor coming back or spreading.

This tumor is so uncommon that doctors often don't know the best way to treat it. In this case, surgery alone seemed to work well. But because this is a report of just one patient, we can't draw broad conclusions.

The findings suggest that complete surgical removal may be a good option for localized versions of this tumor. However, the patient will need continued monitoring to watch for any late recurrence.

It's important to remember that this is a single case report — not a large study. The results may not apply to other patients, and no safety information was reported. More research is needed to confirm these findings.

What this means for you:
Surgery alone may treat this rare kidney tumor, but evidence is limited to one case.

Study Details

Study typeCohort
EvidenceLevel 3
PublishedApr 2026
View Original Abstract ↓
To investigate potential diagnostic approaches and therapeutic strategies for renal inflammatory myofibroblastic tumors (IMT). Renal IMT is a rare mesenchymal neoplasm with intermediate malignant potential arising within the urinary system. Its clinical presentation and imaging characteristics are nonspecific; thus, histopathological examination remains the diagnostic gold standard. This article presents a retrospective analysis of the clinical course of a single patient diagnosed with renal IMT. An elderly female presented with intermittent abdominal pain. Abdominal contrast-enhanced computed tomography (CT) revealed a solid mass located in the anterior lip of the right kidney. Following radical right nephrectomy, histopathological evaluation confirmed the diagnosis of renal IMT. At the 3- and 6-month follow-up visits postoperatively, the patient showed no evidence of local recurrence or distant metastasis. Definitive diagnosis of renal IMT relies exclusively on histopathological assessments. For localized disease, complete surgical resection, preferably radical nephrectomy, is the treatment of choice. In advanced or unresectable cases, tyrosine kinase inhibitors and other targeted agents may be considered as potential therapeutic options.
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