Solitary colonic metastasis from renal cell carcinoma presenting as a surgical emergency nine years post-nephrectomy
© Jadav et al; licensee BioMed Central Ltd. 2010
Received: 27 April 2010
Accepted: 29 June 2010
Published: 29 June 2010
Late colonic metastasis following curative surgery for renal cell carcinoma has rarely been described. We present the first reported case of solitary colonic renal cell carcinoma metastasis presenting as an intra-abdominal bleed, nine years post-nephrectomy.
The worldwide incidence of renal cell carcinoma (RCC) is approximately 209 000 new cases per year with a mortality of 102 000 deaths per year. This accounts for 3% of all adult malignancies. Metastatic disease may be present in up to 25% of patients at the time of diagnosis [1, 2].
Intestinal metastasis from RCC is uncommon. The commonest site of distant metastasis in 1451 autopsy cases with RCC was in the lungs (76%), followed by lymph nodes, bones and liver . RCC very rarely metastasizes to the colon - a comprehensive Medline search revealed only 7 reported cases to date, of post-nephrectomy colonic metastasis from RCC [4–10]. This case represents the first incidence of late colonic RCC metastasis presenting as a surgical emergency in the way of an intra-abdominal bleed.
A 65-year-old woman presented to casualty with acute abdominal pain and collapse. The only significant history was of a left nephrectomy for clear cell renal carcinoma nine years previously, from which she had made a full recovery, recently being discharged from further follow-up. The patient recalled that her RCC had been excised with tumour-free margins - no further information was available.
Examination revealed generalised abdominal tenderness with a normal haemoglobin of 11.4 g/dL. Portable ultrasound scan excluded an abdominal aortic aneurysm. A few hours later, she became haemodynamically unstable with marked abdominal distension. Repeat bloods showed a drop in haemoglobin to 7.7 g/dL. There had been no sign of haematemesis, melaena or fresh rectal bleeding. At emergency laparotomy, an actively bleeding mass was found attached to the surface of the mid-transverse colon. This was excised locally with the resulting colonic defect closed in 2 layers. No other lesions were noted within the abdominal cavity.
Macroscopic examination revealed a 6 × 6 cm soft brown tumour with central necrosis. Histology of the lesion demonstrated a clear cell tumour - a metastasis from the original renal cell carcinoma removed nine years previously. Subsequent computed tomography (CT) of the thorax and abdomen excluded any further metastatic disease. As such, a conservative approach without immunotherapy was adopted and the patient was followed-up with regular clinical examination and CT scans. No evidence of further recurrence has been demonstrated six years following her laparotomy.
Uchida et al have stated that if patients with RCC undergo curative nephrectomy and subsequently develop recurrence, this usually occurs within five years post-operatively (i.e. early recurrence) . Out of 239 patients who had no distant metastasis at the time of initial diagnosis, 68 patients had recurrence after nephrectomy. 84% of these were within the first five years following surgery. Late recurrence of RCC occurs in as many as 11% of patients surviving ten years or more, and the longest reported interval from nephrectomy to recurrence is 31 years [7, 9, 10].
The biological behaviour of RCC is variable, and the prognosis unpredictable. Despite it being a male-predominant disease (2:1), the predominance of women among patients with late recurrence and their better survival rate may suggest an endocrine influence on the activity of the tumour [1, 4, 6, 9, 11]. Late recurrence is not only more likely to occur in women but also in individuals with well-differentiated tumours [6, 11]. This supports the importance of prognostic markers like the Fuhrman nuclear grade and tumour-node-metastasis (TNM) staging in determining future metastatic potential of RCC [1, 12]. Surgical treatment has been reported to improve survival after late recurrence in patients with solitary metastasis that is confined to one organ. The surgical approach thus remains the most therapeutic option whenever delayed recurrence is resectable [12, 13].
In summary, recurrence of RCC more than five years after nephrectomy is not a rare event, and is one of the particular characteristics of RCC . However, delayed recurrence cannot be predicted at the time of treatment of the primary lesion . Therefore, careful long-term follow-up may be beneficial for patients with a history of RCC even after undergoing a curative nephrectomy [6, 9]. If patients with a history of previous RCC present with an abdominal complaint, surgeons should always consider potential recurrences and seek to exclude further metastases.
Written informed consent was obtained from the patient for publication of this case report and any accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
The authors acknowledge all the nurses who took care of our patient.
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