Primary mucinous neoplasms of the renal pelvis: report of two cases.

OBJECTIVE

To describe the histopathologic features and clinical presentation of two primary mucinous neoplasms of the renal pelvis.

METHODS

We describe two cases and its correlation with histopathologic findings.

RESULTS

Primary mucinous neoplasm of the renal pelvis was diagnosed by histopathology in two patients who received medical treatment for abdominal tumor.

CONCLUSIONS

Primary mucinous neoplasms of the renal pelvis are extremely rare; the first symptom is usually abdominal growth, followed by hematuria and flank pain; it is difficult to suspect the diagnosis before surgery, because in most cases it is established with biopsy.