Items tagged “rg_39_1_new”

9 results found

Spinal infection

Spinal infections are an important but relatively uncommon cause of back pain. Clinical presentation Patients may present with back pain, fevers or neurological deficit. They may also have risk factors such as prior instrumentation or injections of the spine, implanted metalwork, intravenous d...

Videofluoroscopic swallow study

Videofluoroscopic swallow studies (also often called modified barium swallow studies) are a variation on traditional barium swallow studies. Although typical barium swallow studies / esophagrams evaluate the pharynx, the goal in these studies is to even more closely evaluate the oral cavity, pha...

Claw sign (MRI)

The claw sign on diffusion weighted imaging refers to a pattern of hyperintensity seen in degenerative changes in the spine. The presence of the claw sign makes spondylodiskitis less likely. Radiographic features MRI DWI the sign appears as well-defined paired regions of restricted diffusion...

Chemical shift ratio

Calculating the chemical shift ratio (CSR) is one way of differentiating benign thymic tissue from thymic neoplasms 1: CSR = (tSIopp / mSIopp) / (tSIin / mSIin) in = in phase, m = muscle, opp = opposed phase, SI = signal intensity, and t = thymus Using a cut-off if 0.849, CSR is 100% specific...


Adrenomyeloneuropathy is a form of X-linked adrenoleukodystrophy characterized by pronounced involvement of the spinal cord with only minor involvement of the cerebral white matter.  Clinical presentation Clinical presentation depends on whether or not there is also cerebral involvement.  In ...


Leukemia is a hematological neoplasm characterized by the overproduction of immature (blasts) or abnormally differentiated cells of the hematopoietic system in the bone marrow that often, but not always, extends into the peripheral blood.  This article aims to provide an overview of leukemia as...

Acute myeloid leukemia

Acute myeloid leukemia (AML), also referred to as acute myelogenous leukemia, is a hematological malignancy characterized by the abnormal clonal proliferation of immature myeloid precursors (myeloblasts) or poorly differentiated cells of the hematopoietic system. It primary infiltrates the bone ...

Therapy-related myeloid leukemia

Therapy-related myeloid leukaemias, also referred to as therapy-related myeloid neoplasms, occur as a late complication after cytotoxic therapies (e.g. chemotherapy, immunosuppressive therapy, and radiation therapy) performed to treat other conditions. They represent hematological malignancies w...

Leukemic cell lysis pneumopathy

Leukemic cell lysis pneumopathy, also referred to as acute lysis pneumopathy, refers to an acute respiratory failure that can occur in patients with leukemia after the initiation of chemotherapy, particularly in those with hyperleukocytosis. On imaging, it manifests with features of acute respir...

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