Imaging of Female Pelvic Emergencies.

Pelvic pain is a common complaint in female patients who present to the emergency department. Although encountered frequently, the path to a definitive diagnosis is not always a straightforward one, and imaging offers a valuable tool to aid in this diagnostic challenge. Radiologists must be familiar with the most common etiologies of female pelvic pain in the emergency setting, their imaging characteristics, and the best way to further evaluate challenging clinical presentations.

Variability in myocardial metabolism on serial tumor (18)F-FDG PET/CT scans.

(18)F Fluorodeoxyglucose (FDG) positron emission tomography (PET) scans are performed routinely for oncologic patients. Myocardial uptake can vary among patients and between serial studies in the same patient. Our study aims to evaluate myocardial metabolism on staging FDG PET scans and to analyze factors influencing patterns of cardiac uptake, and their relevance.

¹¹¹In-DTPA cisternography with SPECT/CT for the evaluation of normal pressure hydrocephalus.

Although new MR imaging techniques can provide high-resolution information on CSF dynamics and are not associated with ionizing radiation, SPECT/CT cisternography is a valuable alternative for those with contraindications to MR imaging. SPECT/CT cisternography combines functional and anatomic imaging to provide accurate and detailed information on CSF distribution to be used in conjunction with clinical findings for the diagnosis and evaluation of NPH, as illustrated in this case report.

A mechanism for functional segregation of mitochondrial and cytosolic genetic codes.

The coexistence of multiple gene translation machineries is a feature of eukaryotic cells and a result of the endosymbiotic events that gave rise to mitochondria, plastids, and other organelles. The conditions required for the integration of these apparatuses within a single cell are not understood, but current evidence indicates that complete ablation of the mitochondrial protein synthesis apparatus and its substitution by its cytosolic equivalent is not possible. Why certain mitochondrial components and not others can be substituted by cytosolic equivalents is not known.