Overview. Beriberi is a disease brought on by a Vitamin B-1 (thiamine) deficiency. There are two types of the disease: wet beriberi and dry beriberi. Wet beriberi can effect heart function and, in the most extreme cases, heart failure. Genetic beriberi is a rare condition that prevents the body from absorbing Vitamin B-1. 2  Pregnant women and anyone with hyperthyroidism (over-active thyroid gland) need extra vitamin B-1.
In this article. Font Size. A. A. A. A salivary gland stone -- also called salivary duct stone -- is a calcified structure that may form inside a salivary gland or duct. It can block the flow of saliva into the mouth. The majority of stones affect the submandibular glands located at the floor of the mouth.
Obstruction of a salivary duct causes inflammation and swelling of the gland. If the obstruction is not relieved, the gland becomes damaged and may ultimately require complete excision. Salivary stones account for half of salivary gland disorders in the UK, with 5.9 cases per 100,000 people each year. Presentation Usually, colicky postprandial swelling of the gland.