Final answer:
The diagnosis for nonerythematous, flesh-colored, dome-shaped papules with a central indentation is molloscum contagiosum, which is caused by a poxvirus and features umbilicated papules.
Step-by-step explanation:
The diagnosis for nonerythematous flesh-colored, dome-shaped papules with a central indentation is molloscum contagiosum. This skin condition is caused by a poxvirus and is characterized by lesions that may appear anywhere on the body, except the palms and soles. Molluscum contagiosum is common in children but can also affect adults, particularly those with weakened immune systems. The central indentation, or umbilication, is a distinguishing feature of these papules.
Importantly, this condition must be differentiated from other skin issues such as the nodules associated with an inflamed conjunctiva or the lesions typical of impetigo and melanoma. Unlike the large, irregular patches of melanoma or the vesicles, pustules, and sometimes bullae of impetigo, molloscum contagiosum presents with distinct dome-shaped papules that are flesh-colored and have a central dip.