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What is 30-yr-male have hemoptysis, facial puffiness, microscopic hematuria & increased serum creatinine. What should be included in the investigation: and explain in detail?
This patient have -facial puffiness and hemoptysis microscopic hematuria & increased serum creatinine
The possible aetiology includes:

Good pasture syndrome
Vasculis Q (Wegener’s granulomatosis, CSS, Microscopic ployangis)
SLE'
Cryoglobulinemia

Investigation; To be recommended

Chest X-ray or CT scan Chest should be done for any cavitary lesions or infiltrates.
ANCA should be advised for Wegener's granulomatosis, MPA, CSS (Charge Strauss syndrome).
24-hour urinary protein should he done to document Glomerular proteinuria
ANA for SLE