Serpiginous

Serpiginous, first known to be used in the 15th century, is a term from Latin serpere (“to creep”), usually referring to a creeping, snakelike or slowly progressive skin disease.^[1][2]

Serpiginous rash in cutaneous larvae migrans

It is used to describe the rash in cutaneous larvae migrans,^[3] erythema annulare centrifugum,^[4] cutaneous pili migrans,^[5] purpura annularis telangiectoides, ringworm,^[6] balanitis circinata,^[7] and some cases of bullous pemphigoid.^[8]

It is also used to describe serpiginous choroiditis, a rare eye condition in which irregularly shaped (serpiginous) lesions are seen in two layers of the eye surface (the choriocapillaris and the retinal pigment epithelium).^[9]