C Myc on chromosome 8 is seen in:
**Core Concept**
The **c-Myc** gene is a proto-oncogene located on chromosome 8q24, playing a crucial role in cell proliferation, differentiation, and apoptosis. Alterations in this gene can lead to uncontrolled cell growth and cancer. The c-Myc protein is a transcription factor that regulates the expression of many target genes.
**Why the Correct Answer is Right**
The correct answer is related to the association of c-Myc with specific types of cancer, particularly those involving translocations or amplifications of the c-Myc gene. In Burkitt lymphoma, a translocation involving chromosome 8 and one of the immunoglobulin gene chromosomes (usually 14, 2, or 22) leads to overexpression of c-Myc. This results in uncontrolled B-cell proliferation.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not specifically associated with c-Myc translocations.
**Option B:** Incorrect as it is not the primary condition linked with c-Myc on chromosome 8.
**Option C:** Incorrect because, although c-Myc is involved in many cancers, this option does not specify the correct condition associated with the c-Myc gene on chromosome 8.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that the **c-Myc** gene's translocation and overexpression are hallmark features of **Burkitt lymphoma**, making it a significant diagnostic and therapeutic target.
**Correct Answer:** D. Burkitt lymphoma.