Challenges and Uncertainties in the Diagnosis of Cardiac Amyloidosis: A Case Report.

Amyloidosis is the condition when starch-like misfolded proteins form insoluble fibrils that deposit in tissues and cause dysfunction. Cardiac amyloidosis occurs due to the deposition of amyloid fibrils at the cardiac level and is an important cause of heart failure. This case reveals a patient with significant heart failure and arrhythmia, which later on turned out to be caused by cardiac amyloidosis.

Recurrent Hypoglycemia in Diabetic Patient With Hypopituitarism: The Houssay Phenomenon.

The association of treatment of diabetes mellitus and hypoglycemia is well described in the literature. However, the association of recurrent hypoglycemia in diabetic patients with hypopituitarism has been rarely described. This phenomenon, called Houssay phenomenon, usually occurs in individuals with a long diabetes evolution.

Graves' Disease Presenting as Urticaria.

Graves' disease (GD) is an autoimmune disease that is characterized by the presence of antibodies targeting the thyroid gland. Commonly, the disease presents with symptoms of thyrotoxicosis such as sweating, tremors, and weight loss; less frequently, patients with GD might also have urticaria. Urticaria is clinically defined as the presence of wheals, angioedema, or both.