photograph of a 4-year-old standard Munchkin cat sire and an adult female domestic cat control. Lateral view of a standard Munchkin cat (a, c, e) and a domestic cat (b, d, f). The limbs of the standard Munchkin cat are shortened in relation to the body. The fore limbs of the standard Munchkin cat (c) show a shortening of all distal and proximal long bones and higher diaphyseal diameters, particularly of humerus, compared to the fore limbs of domestic cat (d). The hind limbs (e, f) also show higher diaphyseal diameters, particularly in the femur, as well as a shortening of the long bones. If a cat is showing signs of feline dwarfism, specific testing can be done to determine if dwarfism is the cause, or if another condition, such as congenital feline hypothyroidism, is causing symptoms similar to feline dwarfism. To determine if a cat has feline dwarfism, X-rays, bone samples, and
genetic testing can be done. Genetic testing on cats with feline dwarfism is being utilised in human research as well.
Congenital feline hypothyroidism Dwarfism has the potential to be mistaken as
congenital feline hypothyroidism. Signs such as disproportionate dwarfism, skeletal abnormalities, and mental disabilities point to both dwarfism and hypothyroidism. Because of this, proper testing can determine whether the cat is showing signs of hypothyroidism or if there is a deeper issue. A blood test measures the levels of
thyroid-stimulating hormone (TSH) in the cat can be performed to rule out feline dwarfism. The test checks the levels of the thyroid hormones
thyroxine (T4) and
triiodothyronine (T3) and will determine if the cat has hypothyroidism, or if further testing needs to be done to come to a different diagnosis. In 2018, a study was performed on a 10-month-old kitten showing signs of disproportionate dwarfism. Testing was performed on its TSH, which confirmed
hypothyroidism in the kitten. The kitten was prescribed thyroid hormone supplementation and after 22 months, presented as an average, healthy cat. Once diagnosed, thyroid hormone supplementation should start as early as possible. == See also ==