enanthem
enanthema

It can be contrasted with an enanthem.

Nagayama's spots are enanthem of red papules on the soft palate.

Forchheimer spots are a fleeting enanthem seen as small, red spots (petechiae) on the soft palate in 20% of patients with rubella.

Koplik spots are a prodromic viral enanthem of measles manifesting two days before the measles rash itself.

Measles is an acute disease characterized by fever, cough, coryza, an erythematous maculopapular rash and a pathognomonic enanthem (Koplik spots).

Enanthem or enanthema are medical terms for a rash (small spots) on the mucous membranes.

Enanthema can present with viral exanthema.