Question:

Which of the following statements is true.
1. Primary renal lymphoma is common
2. Peri-renal primary renal lymphoma is the most common subtype
3. Primary renal lymphoma does not exist
4. Primary renal lymphoma has a long prognosis
5. Primary renal lymphoma is usually seen in middle-aged to adults to the elderly





Answer:

The correct answer for the question "Which of the following statements is true." is:

5. Primary renal lymphoma is usually seen in middle-aged to adults to the elderly



Explanation
1. Primary renal lymphoma accounts for < 5% of all renal lymphoma and is otherwise very rare [9].

2. Peri-renal involvement occurs less than 10% of the time.  [1, 5]

3. Although controversial in the past, it does indeed exist. [6]

4. The overall prognosis of PRL is poor with studies reporting a range of median survival times ranging of 8 months to three years [7]. 

5. Primary renal lymphoma is usually seen in middle-aged to adults to the elderly. [9]



From the manuscript:
Primary Renal Lymphoma Mimicking a Subcapsular Hematoma: A Case Report
Radiology Case. 2013 Aug; 7(8):18-26


This article belongs to the GU section.




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From the manuscript

Primary Renal Lymphoma Mimicking a Subcapsular Hematoma: A Case Report

Free full text article: Primary Renal Lymphoma Mimicking a Subcapsular Hematoma: A Case Report

Abstract
Primary renal lymphoma (PRL) is a rare entity with a history of controversy regarding its existence. Lymphomatous involvement of the kidney is more commonly seen secondarily to spread from an adjacent lymphomatous mass, rather than arising primarily from the kidney. PRL can mimic other renal lesions such as renal cell carcinoma, renal abscess, and metastasis; therefore, an early diagnosis is crucial to guide treatment and properly assess prognosis. We present a rare case of a 77 year-old male who presented with hematuria and PRL mimicking a subcapsular hematoma.






References



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2. Cyriac S. Primary renal lymphoma mimicking renal cell carcinoma. Indian J Urol 2010 Jul;26(3):441-3
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3. Paganelli E. Primary non-Hodgkin lymphoma of the kidney. Haematol 1989; 74:301-4
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4. Gellrich J. Primary renal non-Hodgkin`s lymphoma - a difficult differential diagnosis. Onkologie 2002 Jun;25(3):273-7
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5. Omer H. Primary Renal Lymphoma. Nephrology 2007; 12, 314-315
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6. Stallone G, Infante B, Manno C, Campobasso N, Pannarale G, Schena FP. Primary renal lymphoma does exist. J Nephrol 2000;13:367-72
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7. Ladha A, Haider G: Primary renal lymphoma. J Coll Physicians Surg Pak 2008, 18:584-585.
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8. Gupta A, Bhatt A, Khaira A, Gupta A, Ran DS. Primary renal lymphoma: A differential diagnosis of renal mass in a young male. Saudi J Kidney Dis Transpl 2010;21:544-5
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9. Hyder AO, Mahmoud RH. Primary Renal Lymphoma. Nephrology 2007;12:314-5
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