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.
Salivary duct stones are masses of crystallized minerals that form in the tubes that saliva passes through after itâs made in your salivary glands. This condition is also known as sialolithiasis, and the stone may be referred to as salivary duct calculus.These stones mainly occur in middle-aged adults.alivary duct stones are masses of crystallized minerals that form in the tubes that saliva passes through after itâs made in your salivary glands. This condition is also known as sialolithiasis, and the stone may be referred to as salivary duct calculus. These stones mainly occur in middle-aged adults.