Fibromuscular dysplasia: a rare disease that can mimic vasculitis.

Fibromuscular dysplasia (FMD) is an uncommon angiopathy that occurs mainly in young to middle-aged female individuals. It is an idiopathic, segmental, non-inflammatory and non-atherosclerotic vascular disease leading to stenosis of small- and medium-sized arteries. Clinical manifestations are determined by the artery involved, most commonly hypertension (renal artery) and stroke (carotid artery). When FMD affects multiple vascular beds, it may mimic a systemic vasculitis. Here, we present the case of a young female patient with FMD. The patient had a clinical history of bilateral internal carotid artery dissection that required surgical repair. Since a systemic vascular disease was suspected, abdominal angiography was done, showing evidence of a "string of beads" appearance involving the distal two-thirds of the right renal artery. This lesion is considered to be pathognomonic of the medial FMD that accounts for 70-95% of all cases of FMD. Two years later, a new magnetic resonance angiography confirmed the "string of beads" appearance of the middle to distal part of the right renal artery, with significant hemodynamic stenosis that was successfully dilated with percutaneous transluminal angioplasty.

Case report of acute aortic dissection during treatment with capecitabine for a late recurrence of breast cancer.

BACKGROUND: Cardiovascular toxicity is amongst the most clinically relevant side effects of antitumoral treatments. Moreover, the potential association between anticancer drugs and vascular damage is well known since chemotherapeutics, such as fluoropyrimidines, were introduced into clinical practice. CASE: A 77-year-old woman treated with capecitabine for late recurrence of breast cancer developed life-threatening toxicity shortly after receiving the second cycle of therapy. Although a history of cardiovascular disease was not reported, the imaging procedures performed upon admission to the hospital showed the unpredicted appearance of an acute aortic dissection of the abdominal aorta. CONCLUSION: The absence of risk factors in the woman's history, timing of the dissection and associated life-threatening toxicities that developed, as well as the pathological findings are consistent with the vascular toxicity described in experimental models for fluoropyrimidines. Combined with all these are circumstances supporting a probable cause-effect correlation between the chemotherapy and the dramatic vascular events that occurred.