Which of the following skin lesions are in the early stages of development?

A cyst is a closed sac-like structure that can be filled with fluid, semi-solid material, or air. In the early stages of development, cysts may initially appear as small lumps under the skin and can remain asymptomatic for some time. They arise from a variety of causes, including obstruction of a gland or the accumulation of keratin. Recognizing a cyst in the early stages is important for monitoring and determining if intervention is needed, as some can become inflamed or infected over time.

In contrast, other skin lesions mentioned typically represent more advanced or chronic conditions. For instance, a polyp often develops as an overgrowth of tissue, and while it might be in its infancy when first identified, it typically represents an ongoing growth process. Scars are the result of healed wounds and represent a final stage of skin damage repair, while keratosis, which includes conditions like actinic keratosis, suggests a form of abnormal skin growth that has progressed due to damage or chronic irritation, indicating that it is not in the early developmental stages.

Thus, among the options, a cyst is most accurately described as being in its early stages of development.