Transverse grooves on the fingernails of patients recovering from a serious illness (like a myocardial
infarction). This produces a transient intermittent inflammation of the matrix, resulting in arrested
growth. Grooves will progress distally with the nail, eventually coming into view and finally moving out as
the nail elongates.
infarction). This produces a transient intermittent inflammation of the matrix, resulting in arrested
growth. Grooves will progress distally with the nail, eventually coming into view and finally moving out as
the nail elongates.