Differential Diagnosis for Bilateral Back Pain with Hematuria
Single Most Likely Diagnosis
- Nephrolithiasis (Kidney Stones): This condition is a common cause of bilateral back pain and hematuria. The presence of 3+ blood in the urine supports this diagnosis, as kidney stones can cause bleeding in the urinary tract.
Other Likely Diagnoses
- Pyelonephritis: Although the white count is normal with no shift, pyelonephritis (infection of the kidney) can still be considered, especially if the patient has other symptoms like fever or flank pain. However, the absence of leukocytosis makes this less likely.
- Urinary Tract Infection (UTI): A UTI could cause hematuria and back pain, but the normal white count and lack of other symptoms (like dysuria or frequency) make this less likely.
Do Not Miss Diagnoses
- Renal Cell Carcinoma: Although rare, renal cell carcinoma can cause hematuria and back pain. It's crucial to consider this diagnosis to avoid missing a potentially life-threatening condition.
- Trauma: Even if not immediately apparent, trauma to the back or abdomen could cause bilateral back pain and hematuria. It's essential to inquire about any recent accidents or injuries.
- Vasculitis (e.g., ANCA-associated vasculitis): Certain types of vasculitis can affect the kidneys and cause hematuria and back pain. These conditions can be severe and require prompt treatment.
Rare Diagnoses
- Sickle Cell Disease: In patients with sickle cell disease, sickling crises can cause back pain and hematuria due to sickling in the kidneys.
- Alport Syndrome: A genetic disorder that affects the type IV collagen in the kidneys, leading to hematuria and potentially back pain.
- Goodpasture Syndrome: An autoimmune disease that can cause glomerulonephritis, leading to hematuria and back pain, although it is very rare.