High-resolution free-breathing automated quantitative myocardial perfusion by cardiovascular magnetic resonance for the detection of functionally significant coronary artery disease.

AIMS: Current assessment of myocardial ischaemia from stress perfusion cardiovascular magnetic resonance (SP-CMR) largely relies on visual interpretation. This study investigated the use of high-resolution free-breathing SP-CMR with automated quantitative mapping in the diagnosis of coronary artery disease (CAD). Diagnostic performance was evaluated against invasive coronary angiography (ICA) with fractional flow reserve (FFR) measurement. METHODS AND RESULTS: Seven hundred and three patients were recruited for SP-CMR using the research sequence at 3 Tesla. Of those receiving ICA within 6 months, 80 patients had either FFR measurement or identification of a chronic total occlusion (CTO) with inducible perfusion defects seen on SP-CMR. Myocardial blood flow (MBF) maps were automatically generated in-line on the scanner following image acquisition at hyperaemic stress and rest, allowing myocardial perfusion reserve (MPR) calculation. Seventy-five coronary vessels assessed by FFR and 28 vessels with CTO were evaluated at both segmental and coronary territory level. Coronary territory stress MBF and MPR were reduced in FFR-positive (≤0.80) regions [median stress MBF: 1.74 (0.90-2.17) mL/min/g; MPR: 1.67 (1.10-1.89)] compared with FFR-negative regions [stress MBF: 2.50 (2.15-2.95) mL/min/g; MPR 2.35 (2.06-2.54) P < 0.001 for both]. Stress MBF ≤ 1.94 mL/min/g and MPR ≤ 1.97 accurately detected FFR-positive CAD on a per-vessel basis (area under the curve: 0.85 and 0.96, respectively; P < 0.001 for both). CONCLUSION: A novel scanner-integrated high-resolution free-breathing SP-CMR sequence with automated in-line perfusion mapping is presented which accurately detects functionally significant CAD.

[Mandibular aneurysmal bone cyst mimicking a malignant tumor]. / Kyste osseux anévrismal mandibulaire mimant une tumeur maligne.

CASE: We report the case of a 24-year-old woman presenting with a rapidly growing mass in the right masseteric region. MRI suggested a diagnosis of a rhabdomyosarcoma but CT-scan evoked a benign lesion such as chondroblastoma or aneurismal bone cyst. The biopsy specimen proved the diagnosis of aneurismal bone cyst and the patient was treated by surgical curettage. There was no recurrence after 4 years of follow-up. DISCUSSION: The aneurismal bone cyst of the jaw is a rare pseudocystic lesion, characterized by replacement of the normal bone with fibro-osseous tissue containing blood-filled sinusoidal or cavernous spaces. The lesion generally affects young persons under 20 years of age. The molar region, the angle, and the ascending ramus of the mandible are the predominantly affected sites. The lesion does not have any clinical or radiological specificity and surgical curettage is the standard treatment. Recurrence is rare and occurs within 30 months after surgery.

[Cervico-facial lymphangiomas. What's the appropriate management?]. / Les lymphangiomes kystiques cervicofaciaux. Quelle prise en charge thérapeutique?

BACKGROUND: Cystic hygroma is a benign and uncommon vascular tumor. Therapeutic difficulties are variables and are discussed with regard to different clinical forms. The curative treatment is surgical. AIM: The purpose of this study is to discuss the management of the vascular malformation. PATIENTS AND METHODS: We present a retrospective study over a period of 11 years (1995- 2005); about 12 patients treated and followed in ENT department of Habib Thameur Hospital of Tunis. RESULTS: The average age of the patients was 29 years and the average size of the tumor was 7 cm in diameter. A voluminous cervical mass was noted in 3 cases. Local inflammation with respiratory restriction were observed in one patient. Surgical treatment was performed in 8 cases without recurrences. Injection of sclerosing agent (Ethibloc) was indicated in 4 cases because of the volume of the tumor. The following was marked by reduction of the tumor volume. Surgical excision was completed in one case. CONCLUSION: The management of lymphangioma is challenging. Surgical excision is the best treatment in limited forms. The prognosis of voluminous lymphangiomas is transformed by sclerosing injections.