PediatricsInternal Medicine

Burkitt lymphoma

Q: What is the characteristic chromosomal translocation found in approximately 80% of Burkitt lymphoma cases?

The t(8;14)(q24;q32) translocation involving MYC and the immunoglobulin heavy chain is found in approximately 80% of Burkitt lymphoma cases. This translocation leads to constitutive MYC overexpression, driving the aggressive proliferation characteristic of this malignancy.

Q: Which virus is associated with nearly 95-100% of endemic Burkitt lymphoma cases?

Epstein-Barr virus (EBV) is associated with nearly 95-100% of endemic Burkitt lymphoma cases. EBV infects B cells and expresses EBNA proteins that promote proliferation, contributing to lymphomagenesis.

Q: What is the typical age distribution for endemic Burkitt lymphoma?

Endemic Burkitt lymphoma typically affects children aged 4-7 years. This age distribution is characteristic of the endemic variant found in malaria-endemic regions of Africa.

Q: What is the classic clinical presentation site for endemic Burkitt lymphoma?

The classic presentation of endemic Burkitt lymphoma is a jaw mass, with the maxilla being more commonly affected than the mandible. This was the original presentation observed by Denis Burkitt in Uganda.

Q: What histopathologic finding gives Burkitt lymphoma its characteristic 'starry sky' appearance?

The 'starry sky' appearance is produced by tangible body macrophages scattered among tumor cells, phagocytosing apoptotic debris. This occurs because despite massive proliferation, Burkitt lymphoma also has a high apoptosis rate.

Burkitt lymphoma is a high-grade mature B-cell non-Hodgkin lymphoma characterized by MYC translocation and an extremely high proliferation rate with Ki-67 approaching 100%, making it one of the fastest-growing human malignancies. Despite its aggressive nature, it is highly chemosensitive and considered one of the most curable cancers when treated with intensive short-duration regimens, with intrathecal methotrexate mandatory for CNS prophylaxis. Medical students should recognize its three clinical variants—endemic (presenting as jaw mass in African children), sporadic (typically ileocecal mass), and immunodeficiency-associated—and be alert to tumor lysis syndrome, which often occurs spontaneously even before chemotherapy initiation due to the rapid cell turnover.

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1. What is the characteristic chromosomal translocation found in approximately 80% of Burkitt lymphoma cases?

2. Which virus is associated with nearly 95-100% of endemic Burkitt lymphoma cases?

3. What is the typical age distribution for endemic Burkitt lymphoma?

4. What is the classic clinical presentation site for endemic Burkitt lymphoma?

5. What histopathologic finding gives Burkitt lymphoma its characteristic 'starry sky' appearance?

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Burkitt lymphoma

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