A 25 years old female develops serous otitis media of left ear with cough and occasional hemoptysis and hematuria and epistaxis for one and half months her hemoglobin is 7 gm. B.P is > 170/100, proteinuria +++, RA – ve and ANCA – ve, the likely cause is?
First, the symptoms point towards a systemic illness. Serous otitis media isn't common without an underlying issue. Cough with hemoptysis and hematuria suggest a pulmonary and renal involvement. The anemia, hypertension, and proteinuria indicate kidney disease. The negative ANCA and RA are important because they rule out certain autoimmune conditions.
Now, considering the combination of pulmonary and renal symptoms with anemia and hypertension. Goodpasture's syndrome comes to mind because it's an autoimmune disease targeting type IV collagen in the basement membranes of the lungs and kidneys. This would explain the hemoptysis, hematuria, and renal failure. The negative ANCA is a key point here because Wegener's granulomatosis (now GPA) typically has positive ANCA, which is ruled out here. Also, the absence of RA suggests not a rheumatoid etiology.
Other options like systemic lupus erythematosus (SLE) can cause renal and pulmonary issues, but SLE usually has positive ANA and other autoantibodies, which aren't mentioned here. Vasculitis like Churg-Strauss might involve asthma and eosinophilia, which aren't present. Henoch-Schönlein purpura is more common in children and has a rash and abdominal pain, which aren't features here.
So the most likely diagnosis is Goodpasture's syndrome, given the classic triad of lung, kidney, and anemia, with negative ANCA and RA. The presence of anti-GBM antibodies would confirm it, but the question doesn't mention that test. But based on the given info, this is the best fit.
**Core Concept** The question tests recognition of Goodpasture’s syndrome, a rare autoimmune disorder characterized by pulmonary hemorrhage, glomerulonephritis, and anti-glomerular basement membrane (anti-GBM) antibodies. It typically presents with hemoptysis, hematuria, and renal failure, often with anemia and hypertension.
**Why the Correct Answer is Right** Goodpasture’s syndrome involves autoantibodies attacking type IV collagen in basement membranes of alveoli and glomeruli, causing pulmonary hemorrhage (hemoptysis) and rapidly progressive glomerulonephritis (hematuria, proteinuria, hypertension). The triad of pulmonary, renal, and anemia (from chronic blood loss) aligns with the patient’s presentation. Negative ANCA and RA rules out Wegener’s granulomatosis and rheumatoid vasculitis, which are ANCA-positive.
**Why Each Wrong Option is Incorrect**
**Option A:** Systemic lupus erythematosus (SLE) may cause renal involvement but typically presents with positive ANA, leukopenia, and a rash, not anti-GBM antibodies.
**Option B:** Wegener’s granulomatosis (now GPA) is ANCA-positive and involves granulomatous inflammation, not anti-GBM antibodies.
**Option C:** Henoch-Schönlein purpura includes palpable purpura