Lymphoma

The AIDS-defining cancers are Kaposi sarcoma, certain lymphomas and cervical cancer.

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Study material on Lymphoma

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Causes of exudates
Causes of exudates
Visual clues in pleural fluid
Visual clues in pleural fluid

Practice questions on Lymphoma

The anti-apoptotic effect of BCL-2 overexpression in follicular lymphoma occurs due to:

Answer: B. BCL-2 is an anti-apoptotic protein. Overexpression of BCL-2, as seen in follicular lymphoma (often due to the t(14;18) translocation), prevents the activation of pro-apoptotic proteins (like BAX and BAK) and thus inhibits the intrinsic pathway of apoptosis, leading to increased cell survival.

The anti-apoptotic effect of BCL-2 overexpression in follicular lymphoma occurs due to:

Answer: A. BCL-2 is an anti-apoptotic protein. Overexpression of BCL-2, often due to the t(14;18) translocation in follicular lymphoma, inhibits the function of pro-apoptotic proteins (like Bax and Bak), thereby preventing the intrinsic pathway of apoptosis and allowing malignant B cells to survive.

The anti-apoptotic effect of BCL-2 overexpression in follicular lymphoma occurs due to:

Answer: A. BCL-2 is a proto-oncogene that acts as an inhibitor of apoptosis. Overexpression of BCL-2, as seen in follicular lymphoma (often due to t(14;18) translocation), blocks the intrinsic pathway of apoptosis by preventing the release of cytochrome c from mitochondria, thereby promoting cell survival.

The anti-apoptotic effect of BCL-2 overexpression in follicular lymphoma occurs due to:

Answer: A. BCL-2 is an anti-apoptotic protein. Overexpression of BCL-2 prevents the release of pro-apoptotic factors, such as cytochrome c, from the mitochondria by inhibiting the permeabilization of the outer mitochondrial membrane. This blocks the activation of caspases, thereby inhibiting apoptosis and promoting tumor cell survival. Cyt c is released from the mitochondria, not the nucleus.

The anti-apoptotic effect of BCL-2 overexpression in follicular lymphoma occurs due to:

Answer: A. BCL-2 is an anti-apoptotic protein. Overexpression of BCL-2, often due to a translocation in follicular lymphoma (t(14;18)), prevents the release of cytochrome c from the mitochondria, thereby inhibiting the intrinsic apoptotic pathway and promoting cell survival.

The anti-apoptotic effect of BCL-2 overexpression in follicular lymphoma occurs due to:

Answer: B. BCL-2 is an anti-apoptotic protein. Overexpression of BCL-2 inhibits apoptosis by preventing the release of pro-apoptotic factors, such as cytochrome c, from the mitochondria into the cytoplasm. This process is crucial for the initiation of caspase cascades, which execute the apoptotic program. Therefore, BCL-2 overexpression blocks mitochondrial outer membrane permeabilization.

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