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Median nail dystrophy presents as gifts that resemble an upside-down fir tree or Christmas tree because to tiny fissures or cracks that break toward the nail edge or extend laterally from the center canal. [3] Usually symmetrical, the ailment primarily affects the thumbs, though it can also affect other fingers or toes. [4]
Polyonychia can also be acquired, such as after an accident that affected the nail bed causing it to split. This type of polyonychia is just referred to as "post-traumatic split nail" [3] Polyonychia's syndromic causes include: Isolated congenital onychodysplasia [4] Polyonychia's non-syndromic causes include:
Dermatologist Lindsey Zubritsky is "begging" her 1.4 million TikTok followers to check their nails for a vertical line, which could indicate a subungual melanoma, a rare, but serious skin cancer ...
When the condition occurs on all the twenty nails of the fingers and toes, it is known as twenty-nail dystrophy, most evident in childhood, [4] favoring males. [ 2 ] [ 5 ] Trachyonychia causes the nails to become opalescent, thin, dull, fragile, and finely longitudinally ridged, and, as a result, distally notched. [ 6 ]
Ectrodactyly involves the deficiency or absence of one or more central digits of the hand or foot and is also known as split hand–split foot malformation (SHFM). [9] The hands and feet of people with ectrodactyly are often described as "claw-like" and may include only the thumb and one finger (usually either the little finger, ring finger, or a syndactyly of the two) with similar ...
More specifically, the patient's index and middle finger cannot flex at the MCP joint, while the thumb usually is unable to oppose. This is known as hand of benediction or Pope's blessing hand. Another test is the bottle sign—the patient is unable to close all their fingers around a cylindrical object. [10]