A Cross-Sectional Study Examining the Parametric Thyroid Feedback Quantile Index and Its Relationship with Metabolic and Cardiovascular Diseases.

The usual inverse correlation between thyrotropin (TSH) and thyroid hormone disappears in syndromes of central resistance to thyroid hormone, where both are high. TSH and thyroid hormone are also simultaneously high when there is an elevation of the set point of the thyroid regulation axis. This can be estimated with indices, such as the Parametric Thyroid Feedback Quantile-based Index (PTFQI), which was designed for the general population.

Persistent hypoglycemia due to an IGF-II-secreting malignant pheochromocytoma: a case report and literature review.

A malignant pheochromocytoma with IGF-II-mediated hypoglycemia is reported; although treatment was cumbersome and evolution unfortunate, this diagnosis must be kept in mind when dealing with NICTH's differential diagnosis.