Hemangiopericytoma (HPC) is an uncommon vascular tumor and arises from the proliferation of special cells called pericytes. In 1995, a unique variant of HPC, containing some mature fat, has been first described by Nielsen and was termed lipomatous hemangiopericytoma (LHPC). Clinically, LHPC appears to be indolent, with no recurrences or metastatic spreads. Histologically, LHPC is composed of a variable amount of benign lipomatous and hemangiopericytomatous components. Since the original description, there had been only 2 reports of these tumors, and none in Korea. We report a recent case of lipomatous hemangiopericytoma of the nasal cavity treated by endoscopic excision.
Hemangiopericytoma* ; Korea ; Nasal Cavity* ; Pericytes ; Recurrence

Post-traumatic pseudoaneurysm of the carotid artery is extremely rare but present with progressively severe, often fatal epistaxis. Because temporal course of epistaxis in patients with traumatic pseudoaneurysm of the carotid artery commonly demonstrates a variable latency period, pseudoaneurysm is often a clinical challenge. Optimal management for this diseases demands rapid recognition and treatment to give the best functional outcome. The authors have experienced three cases of traumatic pseudoaneurysm of the carotid artery resulting in massive epistaxis and showing unusual clinical course that were successfully treated with endovascular techniques. In two patients, pseudoaneurysm formation resulted from hemorrhage of the internal carotid artery (ICA). The other one case resulted from the external carotid artery (ECA).
Aneurysm, False* ; Carotid Arteries ; Carotid Artery, External ; Carotid Artery, Internal* ; Endovascular Procedures ; Epistaxis* ; Hemorrhage ; Humans ; Latency Period (Psychology)

BACKGROUND AND OBJECTIVES: An isolated sphenoid sinus lesion is a rare disorder and is difficult to diagnose for several reasons. This lesion can easily spread to the adjacent structures and lead to severe complications. Thus, early diagnosis and treatments are needed. We experienced 17 cases of isolated sphenoid sinus lesions, including inflammatory, neoplastic, and vascular lesions, and reviewed the clinical findings, radiologic features, treatments and complications of these cases. MATERIALS AND METHOD: Isolated sphenoid sinus lesions were reviewed retrospectively of patients from January 1995 to July 2001. Patients were identified with radiologic findings and intraoperative endoscopic findings excluding other paranasal sinus involvements. RESULTS: The most common symptom was headache, and 13 patients (76%) complained. Nasal symptoms appeared only 4 patients (23%). Pathologic reviews showed 9 cases of acute and chronic sinusitis were 9 cases, 4 fungal sinusitis, 2 neoplastic diseases, 1 polyp, and 1 vascular disease. We carried out medical treatment in 5 cases, and diagnostic biopsy in 3 cases, and therapeutic surgery in 10 cases. In 7 cases, complications including cranial nerve palsy were observed, and 1 patient was expired due to meningitis. CONCLUSION: We can diagnose isolated sphenoid sinus lesions exactly with the use of radiologic findings and endoscopic examinations. With endoscopy, we can operate relatively less invasively and more effectively. It is apparent that early recognition and rapid treatment are essential if complications are to be avoided.
Biopsy ; Cranial Nerve Diseases ; Early Diagnosis ; Endoscopy ; Headache ; Humans ; Meningitis ; Polyps ; Retrospective Studies ; Sinusitis ; Sphenoid Sinus* ; Vascular Diseases