Fibroxanthosarcoma of kidney

Renal malignant fibrous histiocytoma

The clinical, radiographic, and pathologic findings of 2 cases of malignant fibrous histiocytoma (MFH) of the renal capsule are reported and the 17 previous cases in the literature reviewed. Preoperative differentiation from renal adenocarcinoma was precluded by the overlap in clinical, laboratory, and radiologic findings, although MFH usually presented with a normal urine analysis and less parenchymal involvement on imaging studies. Pathologic differential diagnosis and therapeutic approaches are presented.

Primary sarcomas of the kidney. A clinicopathologic and DNA flow cytometric study of 17 cases

Primary sarcomas of the kidney in adults are rare. In the handful of published reports of all soft tissue sarcomas, DNA ploidy has correlated with histologic grade and outcome. This report presents the clinicopathologic and flow cytometric features of 17 cases of primary renal sarcoma (seven men and ten women, ages 28-69 years). Presenting symptoms included abdominal and back pain and hematuria. Stages at diagnosis were I, in three patients; II, five patients; III, two patients; and IV, two patients. Eight tumors were leiomyosarcoma, two malignant fibrous histiocytoma, one hemangiopericytoma, one fibrosarcoma, and five unclassified. Tumors measured 5.5 to 23 cm, seven contained marked nuclear pleomorphism, seven were extensively necrotic, and mitotic rate was 1 to 33 per 10 high-power fields. Seven tumors showed aneuploidy and five were diploid. Thirteen patients were dead of disease after a mean of 23 months and two were alive with known metastases at 29 and 33 months, respectively. Ploidy pattern and outcome or time to death were not correlated, but aneuploidy correlated with histologic grade, marked nuclear pleomorphism (P less than 0.05), extensive necrosis (p less than 0.01), and high mitotic rate (0.05 less than P less than 0.10). The authors conclude that although DNA ploidy does correlate with histologic grade, for primary renal sarcomas, whose prognosis in this series was extremely poor, it does not correlate with outcome.

Benign fibrous histiocytoma of the kidney

A case of benign fibrous histiocytoma of the kidney in a 48-year-old man is reported. A 7-year followup has revealed no recurrence. To our knowledge there have been no previous reports of benign fibrous histiocytoma of the kidney.

Primary malignant fibrous histiocytoma of the kidney: report of a case

We report a case of primary malignant fibrous histiocytoma of the kidney. Primary involvement of the kidney is rare, with only 8 cases reported in the literature. This malignant mesenchymal tumor is indistinguishable clinically and radiologically from renal cell carcinoma.

Primary renal malignant fibrous histiocytoma

The ninth case of a primary renal malignant fibrous histiocytoma to appear in the English literature is described. The patient underwent preoperative renal artery embolization followed by radical nephrectomy and adjuvant chemotherapy. While adjuvant chemotherapy has prolonged the disease-free interval and improved the survival rates for patients with tumor arising at other sites, its use in our patient did not prevent the development of metastasis and the patient's early death.

Primary renal malignant fibrous histiocytoma: a case report and literature review

Malignant fibrous histiocytoma has been reported as a primary renal tumor in 7 cases, of which 4 had relevant clinical histories and followup. We report an additional case noting, as others have, the similarity in clinical presentation with renal cell carcinoma. Despite a radical operation this tumor often manifests local recurrence with subsequent distant metastases.