Metachronous Solitary Fibrous Tumors in the Same Kidney: A Case Report and Literature Review

Ana Marinho1,2*, Vitor Sousa2,3, Rui Almeida2,3 and Arnaldo Figueiredo1,2

1Department of Urology and Renal Transplantation, Hospital and University Center of Coimbra, Portugal 2Department of Medicine of Coimbra, University of Coimbra, Portugal 3Department of Pathological Anatomy, Hospital and University Center of Coimbra, Portugal

^*Correspondance to: Ana Marinho 

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Abstract:

Solitary Fibrous Tumor (SFT) is a rare spindle cell soft tissue tumor. The combination of clinical, biochemical, and radiological features may help in lesion characterization, but only histology can provide the definitive diagnosis. Recurrence and/or metastases have been reported in up to 10% to 15% of cases. Although no clear evidence-based treatment guidelines exist, it is widely accepted that renal SFT need to be removed surgically to avoid the potential of malignant degeneration and metastases. A longer follow-up period might be necessary to definitively evaluate the clinical outcome of a renal SFT. A 36-year-old male, without comorbidities, underwent laparoscopic excision of a 7 cm left juxta-hilar pararenal mass in October 2018. Preoperative abdominal Computed Tomography (CT) was compatible with a renal cell carcinoma. The pathological study revealed an SFT. An abdominal CT scan, in May 2021, identified a new suspicious left kidney nodule. Thereafter, the patient had done a Magnetic Resonance Image (MRI) in June 2021 that confirmed a mesorrenal nodule suspicious of renal cell carcinoma (24 mm × 21 mm × 21 mm) in the left kidney. He was submitted to open excision of two left juxta-hilar pararenal lesions. Histology provided the definitive diagnosis of metachronous Solitary Fibrous Tumors (SFTs). This is a very rare case of metachronous SFTs in the same kidney of the first resection in a young patient.

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Cite the Article:

Marinho A, Sousa V, Almeida R, Figueiredo A. Metachronous Solitary Fibrous Tumors in the Same Kidney: A Case Report and Literature Review. Ann Clin Case Rep. 2022; 7: 2142..