Final answer:
The patient in this question likely has nephrotic syndrome, specifically membranous nephropathy, based on the symptoms and kidney biopsy findings.
Step-by-step explanation:
The patient in this question presents with nephrotic range proteinuria and hematuria, which are indicative of nephrotic syndrome. Nephrotic syndrome is a condition characterized by glomerular damage that allows a large amount of protein in the blood to enter the urine. Other common features include swelling, low serum albumin, and high cholesterol levels. The kidney biopsy in this case shows dense intramembranous deposits of C3, which suggests the presence of immune complex deposition in the membrane. This finding is commonly associated with a condition called membranous nephropathy.