Secondary causes of hypocholesterolemia were ruled out by clinical study, complementary tests and follow-up.

Lymphocyte transformation or activation tests and enzyme-linked immunosorbent spot assays can be used as complementary tests.

All the parameters, mainly the EDV, have proven useful as complementary tests for monitoring after endourologic resolution of obstructive uropathy.

The patch test remains the "gold standard" diagnostic tool, but many other very useful complementary tests have been developed in recent years.