Hyperthyroidism must also be distinguished from gestational transient thyrotoxicosis; as it can increase the risk of complications for mother and child. Such risks include pregnancy-related hypertension, pregnancy loss, low-birth weight, still birth and behavioral disorders later in the childs life. Nonetheless, high maternal FT4 levels during pregnancy have been associated with impaired brain developmental outcomes of the offspring and this was independent of for example hCG levels. Other animals
Cats
Hyperthyroidism is one of the most common endocrine conditions affecting older domesticated housecats. In the United States, up to 10% of cats over ten years old have hyperthyroidism. The disease has become significantly more common since the first reports of feline hyperthyroidism in the 1970s. The most common cause of hyperthyroidism in cats is the presence of benign tumors called adenomas. 98% of cases are caused by the presence of an adenoma, but the reason these cats develop such tumors continues to be studied. The most common presenting symptoms are: rapid weight loss, tachycardia (rapid heart rate), vomiting, diarrhea, increased consumption of fluids (polydipsia), increased appetite (polyphagia), and increased urine production (polyuria). Other symptoms include hyperactivity, possible aggression, an unkempt appearance, and large, thick claws. Heart murmurs and a gallop rhythm can develop due to secondary hypertrophic cardiomyopathy. About 70% of affected cats also have enlarged thyroid glands (goiter). 10% of cats exhibit "apathetic hyperthyroidism", which is characterized by anorexia and lethargy.The same three treatments used with humans are also options in treating feline hyperthyroidism (surgery, radioiodine treatment, and anti-thyroid drugs).
A urachal fistula is a congenital disorder caused by the persistence of the allantois (later, urachus), the structure that connects an embryos bladder to the yolk sac. Normally, the urachus closes off to become the median umbilical ligament; however, if it remains open, urine can drain from the bladder to an opening by the umbilicus.This condition is a rare defect, mostly found in children, and is also known as an open or patent urachus. == References ==