Efficacy of a fixed low dose of radioactive iodine in the treatment of Graves' disease in Sub-Saharan Africa.

Objective: Graves' disease represents 60%-90% of all causes of thyrotoxicosis in different regions of the world. Thyrotoxicosis contributes approximately 66% to thyroid disorders in South Africa and of those Graves' disease contributes about 34%. In most Sub-Saharan African countries, Graves' disease is managed mainly with medical treatment, due to a lack of or poor access to other means of treatment.

Chemokine Receptor-4 Targeted PET/CT Imaging with Ga-Pentixafor in Head and Neck Cancer-A Comparison with F-FDG and CXCR4 Immunohistochemistry.

Background: Head and neck squamous cell carcinoma (HNSCC) is common, and its incidence is increasing, particularly in HIV-infected individuals who present with more aggressive disease. Despite aggressive treatment, the prognosis remains poor because of resistance to chemoradiation therapy. So far, studies report very low [Ga]Ga-Pentixafor avidity in HNSCC.

Connexin-36-positive gap junctions in ventral tegmental area GABA neurons sustain opiate dependence.

Drug dependence is characterized by a switch in motivation wherein a positively reinforcing substance can become negatively reinforcing. Put differently, drug use can transform from a form of pleasure-seeking to a form of relief-seeking. Ventral tegmental area (VTA) GABA neurons form an anatomical point of divergence between two double dissociable pathways that have been shown to be functionally implicated and necessary for these respective motivations to seek drugs.

A Comparison of Ga-PSMA PET/CT-Based Split Renal Function with Tc-MAG3 Renography in Patients with Metastatic Castration-Resistant Prostate Carcinoma Treated with Lu-PSMA.

Background: Physiological PSMA expression in the cells of the proximal renal tubules and consecutive radiopharmaceutical binding and retention could potentially lead to radioligand-therapy-induced nephrotoxicity. Thus, patients with metastatic castration-resistant prostate cancer undergo Tc-Mercaptoacetyltriglycine (MAG3) renal scintigraphy to assess kidney function and to exclude renal obstruction as part of their workup for PSMA-targeted radioligand therapy (RLT). Tc-MAG-3 renal scintigraphy often requires an additional visit to the nuclear medicine department and patients spend 30-90 min in the department, which is inconvenient and takes up camera time.

Influence of head position on obstructive sleep apnea severity.

Objective: Supine body orientation plays an important role in precipitating upper airway collapse in a significant proportion of obstructive sleep apnea (OSA) patients known to have supine-predominant OSA (OSAsup). Traditionally, trunk position is used to assess OSAsup, but the role of the head position has not been established. We hypothesized that head position influences OSA independently of trunk position.