INTRODUCTION Although metastatic carcinoma in the presence of an occult primary tumor is well recognized, underlying reasons for the failure of the primary tumor to manifest are uncertain. Explanations for this phenomenon have ranged from spontaneous regression of the primary tumor to early metastasis of the primary tumor before manifestation of a less aggressive primary tumor. We report a case...

The clavicle is a fairly common site of metastases of renal cell carcinoma. We report the cases of two patients with undiagnosed renal cell carcinoma who were first seen for shoulder pain secondary to a solitary clavicular metastasis. Wide resection was performed in both cases. Functional and cosmetic results were good, with no shoulder pain or neurovascular deficits. We suggest wide surgical r...

Choriocarcinoma is a rapidly growing tumor that characteristically outgrows its blood supply. We report a rare case of metastatic choriocarcinoma presenting with acute right flank pain due to kidney rupture secondary to renal metastasis. The renal metastasis was embolised to stanch blood for control of hemorrhage. A brief review of the imaging features and therapeutic options for the ruptured r...

Tumor-to-tumor metastasis is a rare phenomenon. From our review of the international literature, around 150 cases have been reported since it was first documented by Campbel in 1868. Renal clear cell carcinoma is well known to be the most common recipient of tumor-to-tumor metastasis in all tumors. However, renal chromophobe cell carcinoma has not been reported to be a recipient. Here, we repor...

We present a case report of a 75-years-old woman affected by renal clear cell carcinoma with a synchronous pancreatic metastasis and a metachronous lung metastasis. This case has two peculiarities. First the pancreatic metastasis was treated just with medical therapy, that is, Sunitinib, instead of the surgical therapy that is mostly considered. Secondly, the pancreatic lesion showed different ...

Renal primitive neuroectodermal tumor (renal PNET) or renal Ewing sarcoma ES) is a rare, rapidly growing malignant small round cell with poor prognosis. A 32-years-old Bangladeshi male patient presented right loin pain, fever and anemia. On CT imaging large (18x10.5x10.0 cm) mass was discovered. suspicion of malignancy, biopsy taken from the mass. Microscopic evaluation showed features consiste...

Occurrence of multiple primary malignant tumors is very uncommon .Co occuring can be synchronous or non synchronous.Tumors presenting within a period less than equal to 6 months are called and if they occur after termed as metachronous. Synchronous malignancies rarer For defining both the should show criteria malignancy, possibility metastasis must have been ruled out pathologically distinct. B...

Solitary metastasis of renal cell carcinoma (RCC) in the mediastinal lymph nodes is rare in patients without lung metastasis. We herein report a case of RCC with solitary mediastinal lymph node metastasis. A mass in the anterior mediastinum was found in the chest computed tomography (CT) scan of an asymptomatic 43-year-old-man. A mass on the right kidney was also revealed in an abdominal CT sca...

Primary leiomyosarcoma of the kidney is rare. Here we report a case of metastasis of this tumor to the stomach. A 73-year-old man visited our hospital suffering from general weakness and intermittent tarry stools. He had undergone right nephrectomy for renal leiomyosarcoma 2 years previously. There had been no local recurrence or distant metastasis in the 2-year follow-up period. Endoscopy reve...

A case of metastasis to the seminal vesicle of renal cell carcinoma is reported. A 60-year-old man was referred to our department for evaluation of intermittent hematospermia and asymptomatic macrohematuria for about 2 years. He had a left radical nephrectomy for localized renal cell carcinoma 5 years ago. Panendscopy showed a little bleeding of posterior urethra, but there were no abnormal ima...