What is the diagnosis for a condition characterized by pruritic vesicular lesions that rupture to form scabs?

The diagnosis of chickenpox is characterized by the presence of pruritic vesicular lesions that begin as small red spots and progress to fluid-filled blisters, which then rupture and form scabs. This progression of lesions is a classic sign of varicella-zoster virus infection, primarily affecting children. The distinctive pattern of skin lesions, along with accompanying symptoms such as fever and malaise, helps in making the diagnosis obvious.

In contrast to the other options, shingles (which is caused by the reactivation of the varicella-zoster virus) typically presents with grouped vesicles confined to a unilateral dermatome and is more commonly associated with pain rather than widespread pruritic lesions. Pityriasis rosea usually starts with a herald patch and develops into a more distinct rash but does not involve vesicular lesions. Impetigo is primarily characterized by honey-colored crusted lesions often resulting from bacterial infection and does not feature the same blistering and scabbing pattern seen in chickenpox. Thus, the specific characteristics of the lesions described give clear support for the diagnosis of chickenpox.