"Linear" deposits of IgG and C3 - this is characteristic of Goodpasture because the antibodies are to the glomerular basement membrane so they deposit all along the glomerulus basement membrane leading to linear immunofluorescence.
Remember that the other main lung/kidney combination, granulomatosis with polyangiitis, is Pauci immune with no immunofluorescence and they will usually mention ANCA
sexymexican888Microscopic polyangitis also presents with lung/kidney problems except theres no nasopharyngeal involvement and also churg strauss but that presents w asthma and both are P-ANCA positive vs C-ANCA for granulomatosis for polyangitis (weCner's granulomatosis) +1
submitted by โcassdawg(1778)
This is goodpasture syndrome which has antibodies directed against alveolar and glomerular basement membranes (FA2020 p596)
The key hints are: