I take "δίκην στόχου" to mean "resembling a target". Depending on the exact context, you may find "target" or "target-like" in English.

The term "target lesions" is used with reference to erythema multiforme:

Target lesions typically occur in erythema multiforme. They can arise on any body site, including face, upper chest, back, arms, legs, hands, feet and mucous membranes (such as the lips). A target lesion is also called a bulls-eye lesion or a cockade (a rosette pattern of concentric rings).
Target and targetoid Lesions | DermNet NZ



Erythema multiforme is characterised by the sudden development of few to hundreds
of red spots. The spots usually begin on feet and hands, and spread upwards
towards the trunk. The face is often involved. Over time these spots change to
plaques (raised patches) and then typical target-shaped lesions, which have a dusky
red centre, a paler area around this, and then a dark red ring round the edge.
Sometimes the centre of the target can be crusted or blistered. The targets can be
different shapes and sizes, hence the Latin name: erythema (redness) multi (many),
forme (shapes).
https://www.bad.org.uk/shared/get-file.ashx?id=83&itemtype=d...


--------------------------------------------------
Note added at 1 day 1 hr (2021-08-24 16:17:14 GMT)
--------------------------------------------------

Link for the first reference:
https://dermnetnz.org/topics/target-and-targetoid-lesions/

--------------------------------------------------
Note added at 1 day 2 hrs (2021-08-24 16:26:13 GMT)
--------------------------------------------------

On the other hand, you will find the term "targetoid plaques":

https://www.google.com/search?client=firefox-b-d&q="targetoi...