A 49-year-old African American man with a medical history notable for long-standing systemic hypertension and deep vein thrombus of the lower extremities 1 year earlier presented with recurrent hemoptysis. There was no history of antecedent fever, weight loss, fatigue, headache, chest pain, dyspnea, leg edema, arthralgias, rash, mucosal ulcerations, or ocular disease. He was not receiving antiplatelet or anticoagulant therapy. Physical examination revealed stable vital signs and coarse breath sounds over bilateral lung fields. Coagulation study findings were normal, there was no leukocytosis, and the erythrocyte sedimentation rate was normal.
Radiologic findingsPosteroanterior and lateral radiographs of the chest showed an ill-defined 4.5-cm mass in the basilar portion of the left lower lobe and a 3.2-cm mass lateral to the upper portion of the right hilum. Contrast-enhanced computed tomography of the thorax was notable for multiple nodular densities throughout both lung fields, the largest of which was located in the left upper lobe (see arrow in Figure 1). Gadolinium-enhanced magnetic resonance imaging with magnetic resonance angiography of the chest revealed a saccular aneurysm in the left upper lobe (see thin arrow in Figure 2). A fusiform aneurysm was identified in the left lower lobe (see thick arrow in Figure 2). A tiny saccular aneurysm was seen in the right lower lobe. In addition, multiple venous occlusions were noted in the superior vena cava and the left brachiocephalic vein.A diagnosis of Hughes-Stovin syndrome was made.
Clinical courseInitial treatment consisted of intravenous methylprednisolone (1 gm/day for 3 days) and oral cyclophosphamide (1.5 mg/kg/day). The patient's hemoptysis resolved and he was discharged on a tapering dose of prednisone and daily oral cyclophosphamide. Seven months later, the patient had another episode of hemoptysis. Pulmonary angiography was performed for consideration of embolization therapy. Angiography failed to reveal any of the previously identified pulmonary aneurysms. Instead, several segmental defects were present peripherally in both lungs, consistent with healing of multiple aneurysms. Two years later, gadolinium-enhanced magnetic resonance angiography revealed complete resolution of the multiple pulmonary aneurysms (see Figure 3). In addition, no new areas of aneurysmal dilatation were noted.
DiscussionAneurysms of the pulmonary arteries are rare (1). Underlying risk factors for pulmonary artery aneurysms (PAAs) include infection, structural cardiac abnormalities, structural vascular abnormalities, and pulmonary hypertension (Table 1). In many cases, PAAs appear to have resulted from the interplay among several of these factors (1). There are 2 idiopathic syndromes associated with PAAs: Behçet's disease and Hughes-Stovin syndrome (1-3). Behçet's disease is a multisystem inflammatory disease of unknown etiology (2,4,5). Patients with Behçet's disease often present with vascular, cutaneous, pulmonary, neurologic, rheumatologic, gastrointestinal, and genitourina...