MICROANATOMY

Detailed explanation-1: -The lunula is the white crescent-shaped area at the base of a nail. In humans, it appears by week 14 of gestation, and has a primary structural role in defining the free edge of the distal nail plate (the part of the nail that grows outward).

Detailed explanation-2: -Absence of lunula can mean several things. It is linked with malnutrition, medical condition or depression. There are different reasons why the lunula changes colour or disappears. Malnourishment: Deficiency of vitamins and minerals in the body, especially Vitamin B12 can change the nails.

Detailed explanation-3: -Abstract. Absent lunula can progressively develop in a person who previously had a normal-sized lunula and can be associated with various systemic disorders. In this case-control study we hypothesised that absent lunula is associated with depression.