Primary metastatic melanoma of the female urethra: A case report and literature review

BACKGROUND

Urethral malignant melanoma is an uncommon and aggressive malignancy, frequently diagnosed at an advanced stage, posing diagnostic and therapeutic challenges.

CASE PRESENTATION

We present the case of a 74-year-old North African female diagnosed with primary metastatic urethral melanoma. Initial staging included a thorough physical examination, pelvic MRI, and whole-body CT scan, initially showing no signs of distant metastasis. Subsequent FDG PET/CT revealed unexpected bone metastases, prompting a significant shift in our management approach. The patient received immunotherapy with pembrolizumab, resulting in sustained metabolic stability at the six-month follow-up.

DISCUSSION

We present recent epidemiological data and risk factors for this uncommon melanoma site. Additionally, we delve into the diagnostic challenges, underlining the expanding role of PET/CT. The discussion also covers managing options in the absence of a consensus.

CONCLUSION

Despite several treatment choices, metastatic urethral melanoma still has a poor prognosis. This reality reflects the complexity of the disease and emphasizes the need for further research to unravel its underlying mechanisms and to establish more effective therapeutic approaches.

Complex case of ureteropelvic junction obstruction with bifid renal pelvis in ectopic kidney: A rare combination

INTRODUCTION

Renal pelvis bifidity, ectopic pelvic kidney, and ureteropelvic junction obstruction are rare urinary tract anomalies resulting from embryological developmental variations. Their coexistence in one kidney is exceedingly uncommon.

CASE PRESENTATION

An 18-year-old male with no prior medical history presented with right-sided lumbar pain. A CT scan revealed bilateral hydronephrosis, with the left kidney being malrotated and ectopically positioned in the pelvis. Dynamic renal scintigraphy confirmed bilateral ureteropelvic junction obstruction. Surgical management involved laparoscopic pyeloplasty for the right UPJ and open surgery for the left ectopic kidney with bifid pelvis.

DISCUSSION

The combination of pelvic kidney, renal pelvis bifidity, and bilateral ureteropelvic junction obstruction is exceptionally rare. Diagnosis often occurs incidentally or when symptoms related to these anomalies emerge. Imaging and dynamic renal scintigraphy play crucial roles in diagnosis. Individualized surgical management is essential for positive outcomes.

CONCLUSION

This case highlights the need for individualized management in complex urological cases involving rare anatomical variations. Surgeon experience and a comprehensive understanding of such anomalies are crucial for successful outcomes.