Thrombosis of abdominal aorta during cisplatin-based chemotherapy of testicular seminoma - a case report
© Dieckmann and Gehrckens; licensee BioMed Central Ltd. 2009
Received: 8 August 2009
Accepted: 22 December 2009
Published: 22 December 2009
Vascular complications occurring during cisplatin-based chemotherapy of germ cell tumours are inadequately recognized to date.
A 49 year old man with advanced seminoma underwent two courses of chemotherapy according to the PEB regimen. Upon restaging, two thrombotic deposits were noted in the descending part of the thoracic aorta and in the infrarenal abdominal aorta, respectively. Although thrombotic plaques caused aortic occlusion of about 30%, no clinical signs of malperfusion of limbs were registered. The patient was placed on anticoagulant therapy. Six months after completion of chemotherapy, thrombotic deposits had completely resolved. In the absence of other predisposing factors, it must be assumed that cisplatin-based chemotherapy represented a strong stimulus for arterial thrombosis in the aorta.
This is the first case of endo-aortic thrombosis during chemotherapy for testicular germ cell cancer. Providers of chemotherapy must be aware of arterial thrombosis even in young patients with testicular cancer.
Cis-platin based chemotherapy is the cornerstone in the management of metastatic testicular germ cell tumour (TGCT) . The regimen consisting of cisplatin, etoposide and bleomycin (PEB) is usually well tolerated, yet, the toxicity profile of this procedure is significant . Basically, there are acute (immediate) and chronic (late) untoward effects of the PEB protocol. Second malignancies and cardiovascular events constitute well recognized long-term hazards of this chemotherapy . With regard to late cardiovascular problems, cisplatin is thought to initiate degenerative processes of vessel walls, thus causing occlusive vascular disease in the long run. All types of arteries may be involved, and accordingly, there is sound evidence for an excess of myocardial infarctions, arterial hypertension, and cerebral strokes occurring in TGCT patients during long-term follow-up. Only recently it became apparent that cardiovascular complications secondary to cisplatin-based chemotherapy may also occur early during the application of systemic therapy or immediately thereafter . Such complications from cisplatin-based chemotherapy have been encountered in several malignancies [5, 6]. However, these events are not well recognized among TGCT patients who are usually younger than most of the patients with other solid malignancies. Thus, we report an unusual case with endo-aortic thrombosis occurring during chemotherapy.
Endo-aortic thrombosis is a quite exceptional complication of cisplatin-based chemotherapy. Only few cases have been reported to date involving patients with esophageal carcinoma , cervical cancer , pancreatic carcinoma and malignant lymphoma . With respect to testicular germ cell tumour, the present case is probably the first event of an endo-aortic thrombosis occurring during chemotherapy. Verdonk et al. reported a celiac trunk thrombosis in a patient undergoing chemotherapy for TGCT . Thrombotic occlusion of peripheral arteries during chemotherapy have been reported in a number of TGCT patients [11–13].
According to Virchow's classical theory, thrombogenesis is principally precipitated by three conditions, first, by compromised blood flow, second, by increased ability of the internal vessel wall to attract blood cells, and third, by systemically increased clotting tendency (humoral factors). Clotting at the aortic wall may arise in the presence of abdominal aortic aneurysm and in extensive atherosclerotic disease, respectively.
Our patient is 49 years old which represents an age category clearly beyond the median age of TGCT patients. As thrombosis is generally associated with increasing age, a slightly increased risk of thrombosis must therefore be considered for this individual, basically. Moreover, he used to be a smoker and there were some minor calcifications detectable in the infrarenal aortic wall upon staging CT. However, there was no clinical sign of systemic atherosclerosis, the body mass index was within normal range (24.8 kg/m2), and no other vascular risk factors were revealed upon clinical examination. Thus in all, there was no rationale to consider any compromised aortic blood flow as a pre-existing risk for thrombosis in this patient.
A tempting idea would be to consider the site of the operative occlusion of the Ductus arteriosus Botalli as an area of increased risk of blood cell adhesions. However, this view must remain rather hypothetical because this putative nidus for thrombotic adhesion had been present for more than 30 years without giving rise to blood cell adhesions ever since. Moreover, the critical site at the wall of the thoracic aorta would hardly explain additional downstream thrombotic deposits. Most obviously, chemotherapy constituted a strong stimulus for the forming of arterial thrombosis in our patient. Cisplatin-related hypercoagulability would correspond to condition No. 3 according to Virchow's theory, i.e. increased (systemic) clotting tendency of the blood caused by humoral factors.
The assumption of chemotherapy-related formation of thrombosis is generally in accord with both, findings on the laboratory level e.g. increased levels of von Willebrand factor and other thrombosis-associated factors in patients receiving cisplatinum [14, 15] as well as with cisplatin-induced hypomagnesemia and with clinical observations of arterial thromboses and even myocardial infarctions in TGCT patients undergoing chemotherapy . Notwithstanding, the formation of thrombotic plaques in the vessel with highest volume-throughput of the body represents a mostly striking observation.
Providers of TGCT chemotherapy should be aware of the hazard of arterial thromboses even in large vessels.
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 the Journal.
Prof. Irmtraud Koop, Hamburg, contributed in assembling valuable clinical data.
Both of the authors are grateful to Albertinen-Stiftung, Hamburg, for funding of the study. In particular, Albertinen-Stiftung provided valuable help in the writing of the manuscript and in the decision to submit the manuscript for publication.
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