What type of proteinuria is typically seen in membranoproliferative glomerulonephritis type 2?

In membranoproliferative glomerulonephritis type 2, also known as dense deposit disease, the proteinuria frequently observed is characteristic of nephrotic range proteinuria. This condition is associated with significant damage to the glomerular filtration barrier, leading to an excessive excretion of protein in the urine, typically more than 3.5 grams per day.

The pathophysiology involves complement dysregulation and the presence of dense intramembranous deposits, which result in alterations in the glomerular ultrafiltration barrier, stemming from both structural and functional aberrations. The extensive proteinuria can lead to a variety of complications, including edema and hypoalbuminemia, highlighting its nephrotic nature.

In summary, the significant protein loss seen in this type of glomerulonephritis aligns well with the characteristics of nephrotic range proteinuria, making it the correct answer in this context.