Wilms’ tumor accounts for the majority of renal tumors in children. Rarely, Wilms’ tumor may metastasize to the bone. We present a case of a 15-month-old female who presented with severe abdominal distension and signs of cachexia. Abdominal ultrasonography and radiography of the abdomen both demonstrated a large abdominal mass. Follow-up computed tomography of the abdomen revealed a heterogeneous intra-abdominal mass arising from the left kidney which was surrounded by a thin rim of renal parenchyma. Biopsy of the mass revealed findings consistent with Wilms’ tumor. The patient was 14 months status-post nephrectomy and chemoradiation but returned to the clinic with left facial swelling. Magnetic resonance imaging of the face demonstrated a multilobulated, heterogeneously enhancing solitary mass lesion in the left temple centered in the left zygoma with signs of bone breakdown. Despite its rarity, metastatic Wilms’ tumor to bone should be considered in a child presenting with a new focal mass overlying bony-structures.

Laparoscopic prostatectomy and robot-assisted laparoscopic prostatectomy are common procedure performed for the treatment of localized prostate cancer. Port site and peritoneal seeding is an exceedingly rare but known complications associated with this procedure. We present a case of a 71-year old male with low-intermediate risk prostate adenocarcinoma who underwent a robot-assisted laparoscopic prostatectomy. Pathology at that time was negative for extraprostatic extension, seminal vesicle invasion, or margins. Seven months later, the patient presented with gross hematuria and was found to have multiple superficial tumors of the bladder urothelium consistent with high-grade papillary urothelial carcinoma. He then began to experience increasing lower abdominal pain and a palpable, right anterior abdominal mass. Computed tomography-guided biopsy revealed high-grade papillary urothelial carcinoma which strongly suggests peritoneal seeding from his recent robot-assisted laparoscopic prostatectomy. Despite its rarity, the morbidity associated with this phenomenon could help justify a recommendation of careful pathologic examination of each prostate specimen for a second urothelial primary with subsequent cystoscopy if one is found.