Nefroma mesoblástico del adulto. Un nuevo caso de un tumor agresivo

Abstract

Background

Mesoblastic nephroma is a tumor that classically appears in childhood, and rarely in the adult. We present herein a case in an adult woman.

Methods

A 53-year-old woman presented with a palpable tumor, hematuria, and pain. A CAT scan revealed a heterogeneous left renal tumor. Left radical nephrectomy was performed.

Results

A lobulated tumor was obtained that measured 17 × 16 cm and weighed 1,850 g. When sliced, a solid, nodular, whitish tumor with a fibrous aspect was revealed. Microscopic study showed long spindle cells and thin vessels and tubules in the stroma. The tumor cells were positive for vimentin and there was no atypia.

Conclusion

The patient is recurrence-free at 2 years of surveillance. The tumor was a benign mesoblastic nephroma, but it was very large and with serious clinical repercussions. The patient requires continued surveillance because of possible large tumor recurrence.