This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nephrotic and Nephritic syndrome, Subject name: Medicine
A patient has absent knee caps and nail abnormalities as shown. Which kidney lesion is common with these patients? 
Select and explain. 
A. FSGS, B. Alpo syndrome, C. MPGN, D. MGN
A: FSGS
Answer: A: FSGS 
Explanation: The above shown image is of ''Nail patella syndrome'' Patients having nail-patella syndrome develop : Iliac horns on the pelvis Dysplasia of dorsal limbs (involves patella, elbows, and nails) It is associated with glaucoma, and abnormalities of the GBM & podocytes, which leads to hematuria, proteinuria, and FSGS.