MR and CT angiography in the diagnosis of vasculitides.

Vasculitides represent the wide-ranging series of complex inflammatory diseases that involve inflammation of blood vessel walls. These conditions are characterized according to the caliber of the predominantly involved vessels. The work-up of vasculitides often includes imaging to narrow a differential diagnosis and guide management. Findings from CT and MR angiography in conjunction with a thorough history and physical exam are of utmost importance in making an accurate diagnosis. Further, imaging can be used for follow-up, in order to monitor disease progression and response to treatment. This wide-ranging literature review serves as the primary resource for clinicians looking to diagnose and monitor the progression of rare vascular inflammatory conditions. This article provides a comprehensive summary of the main findings on imaging related to each of these vasculitides. For each of the named vasculitis conditions, a thorough overview of the diagnostic modalities and their respective findings is described. Many specific hallmarks of pathology are included in this review article.

Pneumothorax in the Setting of Spinal Surgery: A Case Report and Review of the Literature.

The purpose of this paper is to review the occurrence and management of a tension pneumothorax, which was exacerbated status post posterior spinal surgery. A retrospective review of intraoperative reports, imaging, and pertinent medical records was conducted for a patient who underwent posterior spinal surgery with a tiny apical pneumothorax, which subsequently developed into a major pneumothorax. The clinical signs imperative to recognition and prompt treatment are discussed. Our case report demonstrates that the unrecognized disruption of the pleural cavity during posterior spinal surgery caused the exacerbation of the patient's bilateral pneumothoraces. The patient was successfully treated with finger thoracostomy and chest tube insertion. In conclusion, posterior spinal surgery is an invasive procedure with the potential for serious complications such as the exacerbation of a previous non-surgical pneumothorax. A low index of suspicion is imperative due to the potentially lethal nature of pneumothoraces. Vital signs, pulmonary exam findings, portable radiography, and sonography equipment are all invaluable to the accurate diagnosis and early intervention of patients with pneumothoraces.

Embolic Events After Computed Tomography Contrast Injection in Patients With Interatrial Shunts: A Cohort Study.

BACKGROUND: Patients with interatrial shunts (patient foramen ovale/atrial septal defect) are potentially at increased risk for paradoxical air embolism following computed tomography (CT) scans with intravenous (IV) contrast media injection. IV in-line filters aim to prevent such embolisms but are not compatible with power injection required for diagnostic CT. PURPOSE: The purpose of this study was to determine whether the incidence of paradoxical embolism to the heart and brain in patients with an interatrial shunt is higher compared with controls within 48 hours following injection of IV contrast media without IV in-line filter. METHODS: This is a retrospective cohort study conducted at a large tertiary academic center, which included a total of 2929 consecutive patients who underwent 8983 CT scans with IV contrast media injection between July 1, 2000 and April 30, 2018. Diagnosis of an interatrial shunt was confirmed by transthoracic or transesophageal echocardiography. Incidence and risk of cardiac embolic events (new troponin elevation, >0.1 ng/mL) and neurological embolic events (new diagnosis of stroke/transient ischemic attacks) were evaluated. RESULTS: Among the 2929 patients analyzed (mean±SD age, 61±14 y), 475/2929 (16.2%) patients had an interatrial shunt. After applying the exclusion criteria, new elevated troponin was found in 8/329 (2.4%; 95% confidence interval [CI]: 1.1-4.7) patients with an interatrial shunt compared with 25/1687 (1.5%; 95% CI: 0.9-2.2) patients without an interatrial shunt. New diagnosis of stroke occurred in 2/169 (1%; 95% CI: 0.3-4.2) of patients with an interatrial shunt compared with 7/870 (0.8%; 95% CI: 0.4-1.7) without interatrial shunt. CONCLUSION: Among patients with echocardiographic evidence of an interatrial shunt, IV CT contrast administration without an in-line filter does not increase the incidence of cardiac or neurological events.

Pathologic Fracture as Presentation of Generalized Lymphangiomatosis in an Eight-Year-Old: A Case Report and Literature Review.

Pathologic fractures commonly occur secondary to abnormal skeletal physiology in the context of benign or malignant lesions. Rarely, pathologic fractures may occur in the context of a lymphatic abnormality, such as generalized lymphangiomatosis. This rare disorder is characterized by variable presentations in a broad age range of patients. By understanding the effect of widespread lymphatic anomalies on various organ systems, clinicians will be able to make this diagnosis earlier and with more certainty.