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Pathology · Haematology: mantle cell lymphoma
Sample itemA 65-year-old man has generalised lymphadenopathy and splenomegaly. A node biopsy shows small to medium cleaved lymphocytes in a mantle zone pattern, positive for CD5 and CD19 and negative for CD23, with nuclear SOX11 expression. Which translocation is expected?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. t(11;14) with cyclin D1 overexpression
Mantle cell lymphoma carries t(11;14), which places CCND1 under the immunoglobulin heavy chain promoter and drives cyclin D1 overexpression. It is CD5 positive like chronic lymphocytic leukaemia but CD23 negative, and it often involves the gut as lymphomatous polyposis. The course is aggressive and incurable with conventional therapy.
Option by option
A. t(11;14) with cyclin D1 overexpression (correct)
t(11;14) with cyclin D1 is the defining lesion of mantle cell lymphoma.
B. t(8;14) with MYC overexpression
t(8;14) with MYC characterises Burkitt lymphoma, a high-grade tumour with a starry-sky pattern.
C. t(14;18) with BCL2 overexpression
t(14;18) with BCL2 is the hallmark of follicular lymphoma, which is CD10 positive and CD5 negative.
D. t(11;18) producing API2-MALT1
t(11;18) is found in gastric extranodal marginal zone (MALT) lymphoma.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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