**Core Concept**
Satellite lesions refer to small, secondary lesions that occur in the surrounding area of a primary skin lesion, often as a result of the spread of infectious agents or metastasis of cancer cells. This phenomenon is commonly observed in conditions like molluscum contagiosum, warts, or metastatic melanoma.

**Why the Correct Answer is Right**
In the case of molluscum contagiosum, satellite lesions are thought to occur due to the spread of the molluscum contagiosum virus (MCV) from the primary lesion to adjacent skin areas through autoinoculation or direct contact. The virus infects keratinocytes, leading to the formation of characteristic lesions. The exact mechanism of satellite lesion formation is not fully understood, but it is believed to involve the spread of the virus through skin-to-skin contact or contaminated objects.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because satellite lesions are not typically seen in conditions like acne, which primarily involves the pilosebaceous unit and is not characterized by the spread of infectious agents.
**Option B:** This option is incorrect because satellite lesions are not a hallmark of autoimmune skin conditions like psoriasis, which involves an immune-mediated inflammatory response rather than the spread of infectious agents.
**Option C:** This option is incorrect because satellite lesions are not typically seen in conditions like eczema, which involves a complex interplay of genetic and environmental factors leading to skin barrier dysfunction and inflammation.

**Clinical Pearl / High-Yield Fact**
When evaluating satellite lesions, it's essential to consider the primary lesion's characteristics, such as its size, shape, color, and location, as well as the patient's medical history and risk factors for various conditions.

**Correct Answer: C. Metastatic melanoma.**