[Clear cell renal cell carcinoma metastasized by a breast ductal carcinoma].

Objective: To report a clear cell renal cell carcinoma recipient of a metastasizing ductal carcinoma of the breast: A tumor-to-tumor metastasis.

Methods: A 71 year-old woman with a past history of breast carcinoma, diagnosed 12 years before, underwent a nephrectomy for an incidental kidney mass found in a routine imaging examination.

Results: Histological examination revealed foci of ductal carcinoma of the breast in an otherwise typical clear cell renal cell carcinoma of the kidney.

[Late thyroid and pancreas metastases from a clear cell renal carcinoma. Report of two cases].

Objective: To report two cases of late metastases of clear cell renal cell carcinoma.

Methods: Two patients, a male and a female with history of nephrectomy 17 and 16 years before for renal cell carcinomas, presented new tumours in the thyroid and pancreas, which were excised.

Results: Pathology reported that both lesions were clear cell tumours and immunohistochemically they were consistent with metastases from clear renal cell carcinomas.

[Malignant fibrohistiocytoma of the spermatic cord].

A malignant fibrous histiocytoma (MFH) of the spermatic cord is presented and a review of the literature has been performed. The patient here presented survived for eight years and is probably cured of his tumour. In general, MFHs of the spermatic cord have a good prognosis, even when they attain a big size.

Jacalin, another marker for histiocytes in paraffin-embedded tissues.

Jacalin is a lectin which reacts with D-galactose. We have tested jacalin on 75 samples of different formalin- and alcohol-fixed tissues. A consistent cytoplasmic stain of the histiocytes was observed in paraffin-embedded tissues in all cases studied of reactive sinus histiocytosis, macrophages in clear centres of follicular hyperplasia, in tuberculosis granulomas and in osteoclast-like giant cells in a breast carcinoma.

[Enterovesical fistula secondary to leiomyosarcoma].

We report an unusual case of an enterovesical fistula caused by leiomyosarcoma infiltrating the intestinal wall and urinary bladder. The patient had previously presented recurrent urinary tract infection for one year. Although he has residual tumor, so far this elderly patient has survived for three years post-operatively without further antineoplastic treatment.