Different facets of intracranial central nervous system lymphoma and its imaging mimics.

Lymphomas of the central nervous system (CNS) are broadly classified into primary CNS lymphoma (PCNSL) and secondary CNS lymphoma (SCNSL). PCNSL refers to lymphoma restricted to the brain, leptomeninges, spinal cord, or eyes without evidence of it outside the CNS at primary diagnosis, while SCNSL refers to secondary CNS involvement by systemic lymphoma. The brain is the most common site of involvement and intracranial CNS lymphoma has a highly variable imaging appearance and varies according to the patient's clinical profile and immunity.

Hybrid method in severe pulmonary embolism not suitable for systemic fibrinolysis.

Acute massive pulmonary embolism is known to be associated with high mortality, and treatment options may be limited if systemic fibrinolysis is contraindicated. We report the exciting results of a novel mechanical-pharmacological hybrid approach in 3 patients with life-threatening massive pulmonary embolism, in whom systemic fibrinolysis was contraindicated.

Early Enlargement of Aneurysmal Sac and Separation of EndoBags of Nellix Endovascular Aneurysm Sealing System as Signs of Increased Risk of Later Aneurysm Rupture.

Nellix Endovascular Aneurysm Sealing (EVAS) system is a new concept and technology of abdominal aortic aneurysm (AAA) repair. Elective EVAS using Nellix device was performed for a 83-year-old man with AAA. 2-month post-EVAS CTA surveillance demonstrated mild enlargement of aneurysmal sac and separation of the EndoBags, but without detectable endoleak.

Fatal cerebral air embolism related to an air flight.

A patient with chronic obstructive pulmonary disease developed a cough, loss of consciousness, and convulsions during an air flight. Chest radiography showed a large lung bulla. Computed tomography of the brain showed intraparenchymal air and bilateral cerebral infarcts.

Degos' syndrome complicated by bowel perforation: focus on radiological findings.

We describe a 50-year-old man who first presented with multiple skin lesions which were characteristic of Degos' syndrome. The patient developed multiple episodes of abdominal pain. Some episodes resolved with conservative management, for others he underwent urgent operations for bowel perforations.

Acute ischaemic stroke during short-term travel to high altitude.

This is a case report of a young healthy adult who had acute cerebral infarcts after a short-term visit to high-altitude area. He developed acute onset of right-sided limb weakness and right hemianopia a few hours after arrival at an altitude of 3600 m by train. He was initially treated for high-altitude cerebral oedema but later computed tomography and magnetic resonance imaging confirmed ischaemic infarcts in the medial left occipital lobe and left thalamus.

Medications as causes of intraluminal hyperdensities: what radiologists need to know.

In computed tomography (CT) angiogram or some dedicated CT studies of the abdomen, the use of positive enteric contrast should be avoided as its presence could decrease the sensitivity of the test. There are, however, cases of CT scans with unexpected hyperdense intraluminal contents detected due to the use of certain oral or rectal medications. Reports on medications as causes of intraluminal hyperdensities are sparse in the English literature.

US findings of melamine-related renal disorders in Hong Kong children.

Background: The melamine-tainted milk incident has caused renal disorders in more than 290,000 children from mainland China since the start of the outbreak in 2008. Since then, more than 27,000 children in Hong Kong have undergone renal US screening.

Objective: To present and discuss the US features of melamine-related renal abnormalities in Hong Kong children.