Hereditary hemorrhagic telangiectasia mimicking metastasis in a patient with gastric carcinoma

Hereditary hemorrhagic telangiectasia (HHT) is associated with arteriovenous malformation in multiple organs. The association of HHT with primary malignancy has rarely been reported. We describe the case of a 68-year-old man with gastric carcinoma who presented with abdominal fullness and cramping pain. Radiographic examination showed multiple pulmonary nodules and an osteolytic cervical spine lesion. The initial diagnosis of gastric cancer with multiple metastases was revised after meticulous imaging studies revealed these lesions to be vascular malformations in the lungs and vertebra. This case demonstrates that HHT may coexist with a primary malignancy and mimic multiple metastases.