1,720,997 research outputs found
Osteoblastoma of the sacrum: report of 18 cases and analysis of the literature
No full textRetrospective case series.(1) To analyze clinical and radiographical
characteristics, treatment, and outcome in patients with sacral
osteoblastoma, (2) to evaluate progression-free survival and local
recurrence rate, and (3) to identify prognostic factors.Osteoblastoma is a rare tumor
that has been reported to affect the sacrum from 7% to 17%.
Symptoms are various and the diagnosis is often delayed.From 1980 to 2010, 18 patients with sacral osteoblastoma
(16 males and 2 females) were treated at Rizzoli Institute. Lesion
involved S1 (2 cases), S1–S2 (3 cases), S2 (1 case), S2–S3 (1 case),
S2–S4 (1 case), S3 (2 cases), S3–S4 (5 cases), S4 (1 case), and almost
the entire sacrum in 2 cases. According to Enneking classifi cation
for benign bone tumors, 13 (72%) were diagnosed at stage 2
and 5 (28%) at stage 3. Mean tumor volume was 64 cm 3 (range,
2–441 cm 3 ). Nine patients had preoperative magnetic resonance
imaging. Five patients had a previous inadequate intralesional
surgery elsewhere. Treatment consisted in intralesional surgery (16
cases), intralesional surgery and radiotherapy (1 case), and wide
resection (1 case). Local adjuvants used were phenol (7 patients),
cryocoagulation with “iceball” technique (1 case). Embolizations
were performed in 7 patients.At a mean of 8.4 years (range, 1-28 yr), 15 patients (83%) remained continuously disease free, whereas 3 patients had local recurrence (17%). Progression-free survival was 87% at 5 years and 74% at 10 years. No statistical difference was found between patients who received or not local adjuvants (P = 1.254), older or younger than 20 years (P = 0.970), at stage 2 or 3 (P = 0.826), evaluated preoperatively with or without magnetic resonance imaging (P = 0.160), primarily treated versus patients with previous intralesional surgery elsewhere (P = 0.131).In our series, curettage was successful in most of the patients. Local adjuvants did not seem to reduce the risk of local recurrence when combined with intralesional surgery
Meningeal hemangiopericytoma only diagnosed at the time of late bone metastasis
No full textHemangiopericytoma is a rare neoplasm. Primary meningeal hemangiopericytomas account for 1 to 7% of all meningeal tumors. In the literature, meningeal hemangiopericytomas are mainly case reports, which confirm an aggressive behavior with a high rate of local recurrence and extracranial metastasis. Metastasis can be seen many years after initial surgical excision of the primary tumor, and the most common sites include the bone, liver and lung. We present a pathological study of four meningeal hemangiopericytomas with bone metastases. All patients are male with a mean age of 46.5 years. Metastases only involved bone. Three out of four lesions were initially misdiagnosed as meningiomas. Only one case was initially correctly diagnosed as meningeal hemangiopericytoma. All patients underwent surgery with complete resection. Only the patient immediately diagnosed with meningeal hemangiopericytoma received postoperative radiation therapy. Three patients had bone metastases without local recurrence including the one who received radiation therapy. One patient recurred locally after 7 years, and bone metastasis was found at the same time. Our cases confirm that meningeal hemangiopericytomas are a separate entity and have a high recurrence rate despite complete surgical resection, with extracranial metastases, mainly to bone, even after long intervals
Difficulty distinguishing benign notochordal cell tumor from chordoma further suggests a link between them
No full textMuch discussion about benign notochordal cell tissue in vertebrae has centered on the nature of its relationship, if any, to chordoma. Often referred to as benign notochordal cell tumors (BNCTs), these lesions have unique morphological features, however, differentiating between notochordal cells in discs, BNCT, and chordoma can be difficult. They are described as radiologically distinct from chordoma, with lysis, contrast enhancement, and a soft tissue mass indicating chordoma
Multi-slice CT (MSCT) angiography for assessment of traumatic lesions of lower limbs peripheral arteries.
No full textA pictorial review of coronary artery bypass grafts at multidetector row CT
No full textMultidetector row CT scanners with submillimeter spatial resolution and high temporal resolution are now available and are increasingly used for noninvasive assessment of vascular disease including coronary arteries and grafts. The entire heart and graft course can be scanned within a single breath-hold, and contrast-enhanced images are reconstructed through retrospective ECG gating. In this pictorial review, we describe the CT findings of the most commonly used coronary artery bypass grafts on both axial images and two-dimensional and three-dimensional images providing a correlation with conventional coronary angiography
Malignant pleural disease
No full textThe vast majority of pleural neoplasms invade the pleura secondarily and can be seen in patients with bronchogenic carcinoma, breast cancer, lymphoma, and ovarian or gastric carcinoma. Primary pleural neoplasms are less common, although they have developed notoriety since the up-surge of malignant mesothelioma and the knowledge of its connection to asbestos exposure. Other malignant primary tumors include localized fibrous tumor and pleural liposarcoma. In most patients with diffuse malignant pleural disease the chest radiograph shows pleural effusion with or without pleural thickening. Computed tomography (CT) usually provides precise localization and extent of the disease and may be of value in assessing chest wall and mediastinal involvement. In specific situations, magnetic resonance (MR) may be useful as a problem-solving tool when CT findings of chest wall or diaphragmatic invasion are equivocal or in patients with contraindication to intravenous administration of ionic contrast material
Colon-like right coronary artery
No full textCoronary aneurysmatic dilatation may be localized to a segment or may involve multiple segments. We herein report a case of a diffuse aneurysmatic dilatation of the right coronary artery
Gastric wall thickness in normal and neoplastic subjects: a prospective study performed by abdominal ultrasound
No full textGastric wall thickness (body-antrum) was blind measured prospectively by real-time ultrasound in 58 patients (30 with gastric cancer and 28 healthy) who had previously undergone endoscopy. Gastric wall thickness on the average measured 15.933 +/- 4.471 mm in the neoplastic patients and 5.107 +/- 1.100 mm in the normal subjects. Seven millimeters was the highest value found in the normal subjects (4 cases) and the minimum value found in the neoplastic patients (1 case). Knowing the normal gastric wall thickness value on a standard ultrasound examination of the upper abdomen is useful, as ultrasound is often performed as a screening or first-step procedure, in order to address the patients with higher values toward more specific techniques
CCTA in the diagnosis of coronary artery disease
No full textThe world of cardiac imaging is proposing to physicians an ever-increasing spectrum of options and tools with the disadvantages of patients presently submitted to multiple, sequential, time-consuming, and costly diagnostic procedures and tests, sometimes with contradicting results. In the last two decades, the CCTA has evolved into a valuable diagnostic test in today's patient care, changing the official existing guidelines and clinical practice with a pivotal role to exclude significant CAD, in the referral of patients to the Cath-Lab, in the follow-up after coronary revascularization, and finally in the cardiovascular risk stratification
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