It is often used to compare progression of the disease over time, rather than as a stand-alone value. A rapidly increasing CE value can indicate distal displacement (sinking) of the coffin bone, while a more gradual increase in CE can occur with foot collapse. Normal values range from 0–30 mm, with most horses >12–15 mm. Sole depth (SD): the distance from the tip of P3 to the ground. Digital breakover (DB): distance from the tip of P3 to the breakover of the hoof (dorsal toe). Palmar angle (PA): the angle between a line perpendicular to the ground, and a line at the angle of the palmar surface of P3. Horn:lamellar distance (HL): the measurement from the most superficial aspect of the dorsal hoof wall to the face of P3. 2 distances are compared: a proximal measurement made just distal to the extensor process of P3, and a distal measurement made toward the tip of P3. These two values should be similar. In cases of rotation, the distal measurement will be higher than the proximal. In cases of distal displacement, both values will increase, but may remain equal. Therefore, it is ideal to have baseline radiographs for horses, especially for those at high-risk for laminitis, to compare to should laminitis ever be suspected.
Tumid lupus erythematosus  is a rare, but distinctive entity in which patients present with edematous erythematous plaques, usually on the trunk.Lupus erythematosus tumidus (LET) was reported by Henri Gougerot and Burnier R. in 1930. It is a photosensitive skin disorder, a different subtype of cutaneous lupus erythematosus (CLE) from discoid lupus erythematosus (DLE) or subacute CLE (SCLE). LET is usually found on sun-exposed areas of the body. Skin lesions are edematous, urticarialike annular papules and plaques. Topical corticosteroids are not effective as treatment for LET, but many will respond to chloroquine. LET  resolves with normal skin, no residual scarring, no hyperpigmentation or hypopigmentation. Cigarette smokers who have LET may not respond very well to chloroquine.It has been suggested that it is equivalent to Jessner lymphocytic infiltrate of the skin. See also
Lupus erythematosus
List of cutaneous conditions


== References ==