It is also approved in the US for treating of rheumatoid arthritis and psoriasis, persistent nummular keratitis following adenoviral keratoconjunctivitis, and as eye drops for treating dry eyes caused by Sjögrens syndrome and meibomian gland dysfunction.In addition to these indications, ciclosporin is also used in severe atopic dermatitis, Kimura disease, pyoderma gangrenosum, chronic hives, acute systemic mastocytosis, and posterior or intermediate uveitis with noninfective cause. It is also used, albeit infrequently, in severe rheumatoid arthritis and related diseases.Ciclosporin has also been used in people with acute severe ulcerative colitis and hives that do not respond to treatment with steroids. Side effects
Side effects of ciclosporin can include gum enlargement, increased hair growth, convulsions, peptic ulcers, pancreatitis, fever, vomiting, diarrhea, confusion, increased cholesterol, trouble breathing, numbness and tingling (particularly of the lips), itchiness, high blood pressure, potassium retention (possibly leading to hyperkalemia), kidney and liver dysfunction, burning sensations at finger tips, and an increased vulnerability to opportunistic fungal and viral infections. Ciclosporin causes hypertension by inducing vasoconstriction in the kidneys and increasing sodium reabsorption. The increase in blood pressure can cause cardiovascular events; it is thus recommended that the lowest effective dose for people requiring long-term treatment be used.Ciclosporin use after a kidney transplantation is associated with increased levels of uric acid in the blood and, in some cases, gout. This is due to the decrease in glomerular filtration rate, which leads to uric acid retention.
A supernumerary  kidney is an additional kidney to the number usually present in an organism. This often develops as the result of splitting of the nephrogenic blastema, or from separate metanephric blastemas into which partially or completely reduplicated ureteral stalks enter to form separate capsulated kidneys; in some cases the separation of the reduplicated organ is incomplete (fused supernumerary kidney). Less than a hundred cases are known of one or two supernumerary kidneys. See also
Supernumerary body part

References
Luciano A. Favorito; Ana Raquel M. Morais (May–June 2012). "Evaluation of supernumerary kidney with fusion using magnetic resonance image". IBJU. 38 (3): 428–429. doi:10.1590/s1677-55382012000300018. PMID 22765860.