Intimointimal intussusception is a rare type of aortic dissection. The intimal tear occurs circumferentially with intussusception of the intimal flap downstream into the aortic arch causing obstruction of the great supraaortic vessels. A CT diagnosis has only once been reported. CT and angiographic findings of this rare complication of aortic dissection are described.
Die CT-Diagnose einer seltenen Form einer Aortendissektion, die intimointimale Invagination bei zirkulärer Dissektion der Aorta ascendens, wird vorgestellt. Bei diesem Typ der Aortendissektion liegt ein zirkulärer Intimariß mit Einstülpung des Intimaschlauches in den Aortenbogen vor. Dabei erscheint der in das Aortenlumen invaginierte Intimaschlauch in axialer Schnittführung als Ringfigur im Aortenlumen. Neben den typischen CT-Befunden wird auch das angiographische Erscheinungsbild der intimointimalen Invagination beschrieben.
Neurofibromas are benign tumours that arise from neuroectodermal tissues. They may occur as solitary lesions, or multiple, then referred to as neurofibromatosis, or von Recklinghausen's disease. We report on a 27-year old patient with large involvement of many nerve trunks and plexus (elephantiasis nervosa), responsible for bowel obstruction and anuria.
Sarcoma of the pulmonary artery is a rare tumor. The histopathologic features of these tumors differ widely, with leiomyosarcomas representing less than 20 % of all pulmonary sarcomas. Diagnosis is very difficult because most of the cases have no specific clinical signs: the major differential diagnosis is that of pulmonary thromboembolism. We report the case of a 45-year-old woman, who was first treated for pulmonary thromboembolism until the diagnosis of an intravascular growing tumor was made by means of computed tomography, pulmonary angiography and nuclear magnetic resonance tomography. The patient underwent right pneumonectomy and microscopically a leiomyosarcoma of the right pulmonary artery was found.
Aortic arch anomalies are rare. They arise as a failure of the normal development of the left fourth dorsal arch. Cervical aortic arches are believed to result from persistence of the third dorsal arch, which re-routes the aortic arch in the cervical region. We describe a case of a left-sided cervical aortic arch in which the diagnosis was confirmed, and the anatomy defined. using magnetic resonance tomography.
