This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney & Ureturs, Subject name: Surgery
Most common carcinoma after renal transplantation: (AIIMS 97) 
Select and explain. 
A. skin, B. Renal cell ca, C. Lung, D. Adrenal ca
A: skin
Answer: A: skin 
Explanation: Ans: a (Skin cancer) Ref; Campbells Urology, 8th ed, p. 373Immunosuppressed patients are more likely to develop cancer than age matched subjects in general population.Among the tumours, in renal transplant recipients, the common cancers in order:Skin cancerLymphomaKaposi sarcomaCa cervixRenal tumours andCa of vulva and perineumInfections after kidney transplantation:SiteEarly <1 monthMiddle (1 -4 months)Late > 6 monthsUrinary tractBacteriaKlebsiellaPseudomonasCandidaCMVBacteriaLungBacteria-legionellaCMVPneumocystisAspergillusLegionellaListeriaNocardiaAspergillusMucorCNS CMV encephalitisToxoplasmosisCMVListeriaAspergillusCryptococcal meningitisNocardia