Answer
If presents w/ typical ft's, start w/ steroid therapy (also allows for specific dx based on response) and don't bx right away
unless has other atypical ft's: (indication for bx) - suggesting non-idiopathic MCNS
--age <1 y or >12y
--+ve fhx
--extrarenal ds (arthritis, rash, anemia)
--chr ds
--sx's d/t intravascular volume expansion (HTN, pulm edema)
--renal failure
--active urine sediment (red blood cell casts)