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Solitary skin metastasis from sarcomatoid carcinoma of the bladder: a case report
© Manzelli et al; licensee BioMed Central Ltd. 2011
Received: 8 February 2011
Accepted: 28 September 2011
Published: 28 September 2011
Cutaneous metastases from carcinomas of the bladder are very rare. They are related to advanced stages of the disease and have poor prognosis with low survival rates. The common treatment modality of cutaneous metastases from a primary bladder cancer is wide local excision followed by chemotherapy.
We report a case of solitary skin metastasis from a rare type of urinary bladder carcinoma in a 68 year-old Caucasian man. Urinary bladder carcinoma metastasizing to the skin is an uncommon finding despite the high incidence of this tumor. Skin metastasis generally presents in the late stages of this disease and indicates a poor outcome.
Because of the extremely aggressive malignant potential of sarcomatoid carcinomas, the indications for a transurethral resection of the bladder should be carefully assessed and suitable therapeutic strategies should be examined further.
The incidence of cutaneous metastasis from primary urinary malignances is reported from 1.1% to 2.5%. The most common are from kidney cancer (3.4-4%) followed by urinary bladder cancer (0.84-3.6%) and prostate cancer (0.36-0.7%) . Usual sites of metastasis of urinary malignancies include lung, bone, liver and regional nodes . Very few cases of skin metastasizing from urinary bladder are reported in the literature. This type of localization is rare, generally presenting in the late stages of disease and indicates a poor outcome. We report one case of cutaneous metastasis from sarcomatoid carcinoma of urinary bladder, a very rare histological type, with metastatic localization to the thoracic wall.
Cutaneous metastases are generally associated with carcinomas invading the bladder musculature(T3a) or to a local advanced neoplasm (T3b/T4), although the literature reports a few cases of cutaneous metastasis in early stage bladder cancer . Presence of cutaneous localization from urinary bladder cancer is highly correlated to large metastatic disease . Prognosis after cutaneous metastasis appear generally poor with a median survival of 13 to 14 monthsfor patients treated by chemotherapy, although there is one sporadic case in the literature reporting survival at 34 months [5, 6]. Wide surgical excision, as a curative and diagnostic attempt, is considered the first line procedure in these patients. In the treatment of metastatic bladder cancer, single agent chemotherapy using methotrexate, doxorubicin, vinblastine or cisplatin produce response rates in 15 to 25% of patients, whilst multiple agent chemotherapy treatment increases this to 50 to 70% of cases. The combination of gemcytabin, paclitaxel and cisplatin produce response rates in 78% of cases and a complete remission in 28% of the patients producing a median survival rate of 24 months . Alternative combinations of adjuvant therapies are reported in the literature. Craig et al reports a successful case with complete clinical resolution of two metastatic skin lesions in a patient submitted to a cystoprostatectomy for bladder carcinoma, using local irradiation . Kubata et al also discuss a case of complete resolution in a patient treated with bleomycin electrochemotherapy. . Although we need to consider that a non-operative clinical plan in these patients leads to certain disease progression, a single case in the literature describes a case of cutaneous metastasis with spontaneous regression . However, this unusual subtype of cancer still remains a rare histological carcinoma variant where pathological diagnosis is often very difficult with a complex and extensive immunohistochemistry and genetic pattern as described by Terada in his recent publications [11, 12].
The most prominent clinical characteristic of a sarcomatoid carcinoma of the urinary bladder is the extreme aggressive behavior. However, if the stage and the patient's clinical condition indicate surgery as appropriate, then the therapy of choice will be a radical surgical therapy. When surgery is not an option, palliation with radiotherapy is indicated. Further studies are necessary before we can make a conclusion on the therapeutic strategies for sarcomatoid carcinomas of the bladder.
In conclusion, sarcomatoid carcinoma of the urinary bladder is a rare malignancy with a poor clinical prognosis. At the present time, it seems appropriate to treat in the same manner as conventional high-grade transitional cell carcinoma (TCC) of the bladder with similar degrees of invasion. In this group of patients it is important to recognize the possibility of metastasis at uncommon sites. This condition is highly correlated with an advanced oncological staging or with an aggressive histopatological grading of disease and indicates a very poor outcome for the patient.
Written informed consent was obtained from the patient for publication of this case report and accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
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