A. Agrawal et al. / Case Reports in Clinical Medicine 2 (2013) 306-309
308
vulvar malignancies are diagnosed as SCC [1]. Vulvar
SCC can spread by three different routes, direct exten-
sion to adjacent structures, lymphatic embolization and
hematogenous spread to distant sites. Lymphatic spread
occurs early in the disease process and will commonly
spread to the ipsilateral inguinal, femoral and pelvic
lymph nodes, in a sequential manner. Spread to the in-
guinal and femoral lymph nodes occurs in about 30% of
the patients and about 12% of patients will have spread
to the pelvic lymph nod es.
Hematogenous spread to distant sites varies and occurs
in about 8% - 1 2% of patients [2]. Distan t sites of spread
were reported in lung [3,4], skin [4-7], bone [4,8], intra-
abdominal [4], liver [4], heart [4], breast [9], muscle [2]
and central nervous system [4,10,11]. Our case is un ique
in that distant metastatic spread occurred to the kidney,
which has not been previously reported in literature.
Metastatic spread of cancer to the kidneys is not
common despite the fact that the kidneys receive 20% of
the cardiac output. Metastatic spread to the kidney usu-
ally occurs through a combination of venous and lym-
phatic routes. Autopsy findings showed that the most
common metastatic renal lesion is lymphoma [12] and
the top four carcinomas metastasizing to the kidneys are
lung, breast, stomach and opposite kidney [11,12] occur-
ring in 4.6% to 7.6% of patients [13].
Majority of patients presenting with metastatic spread
to the kidneys are asymptomatic and the presence of the
kidney metastasis are not known un til autopsy. However,
patients with renal metastases may present with albu-
minuria, microscopic hematuria, a renal mass or renal
failure [14]. In this case, the patient was diagnosed with
a kidney metastasis after presenting to the emergency
department with severe flank pain and microscopic he-
maturia. A CT scan confirmed the presence of a solid
mass in the left kidney and a radical nephrectomy was
performed.
4. CONCLUSION
Although renal metastasis is rare, and has never been
documented in a case of vulvar SCC, it should be con-
sidered in the differential diagnosis of flank pain and
microscopic hematuria in women with a past history of
vulvar carcinoma. To the best of our knowledge, this is
the first reported case of vulvar carcinoma which devel-
oped renal metastasis.
5. RESULTS
We report a case of 68-year-old women who were
treated in September 2008 with radical vulvectomy, dis-
tal uretherectomy, and bilateral inguinofemoral lympha-
denectomy for FIGO stage IVA (pT3 pN3, M0 G2) mod-
erately differentiated squamous cell vulvar carcinoma.
Due to a positive bilateral lymph node status, close
vaginal and urethral margin, she received adjuvant pelvic
and vulvar radiation (4500 cGy).
The patient remained clinically in remission until Oc-
tober 2010, when presented with flank pain. CT scan of
abdomen reported a 5.5/4.5/4.5 cm tumor in the left kid-
ney and appearance was suggestive of renal cell carci-
noma (Figure 1). A left radical nephrectomy including
paraaortic lymph node dissection was performed in No-
vember 2010. The histopathology and of resected renal
tumor and paraaortic lymph nodes gave evidence of a
metastasis of the known vulvar carcinoma.
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