Erythema annulare centrifugum
https://en.wikipedia.org/wiki/Erythema_annulare_centrifugum
☆ AI Dermatology — Free ServiceIn anno 2022 Stiftung Warentest ex Germania provenit, satisfactio consumptoria cum ModelDerm paulo minus fuit quam cum consultationibus telemedicinis solutis. 

Contra hanc picturam, plerumque lesio scalas non habet.

Hoc in casu, tinea corporis etiam diagnosis differentialis considerari debet, praesertim si aegroti in ambitu calido et humido vivunt vel sudorem excessivum experiuntur.
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References
 Erythema Annulare Centrifugum 29494101 NIH
Erythema annulare centrifugum (EAC) Est species rubrae, quae anulum formans et figuram exteriorem diffundit, centro claro relicto. Cum EAC ex cancro apparet, vocatur PEACE (paraneoplastic erythema annulare centrifugum eruption). PEACE magis communis est in feminis, saepe ante cancrum dignoscitur et post curationem reverti potest. EAC una e praecipuis speciebus erythemata figurata anuli, cum singularibus notis comparatis ad ceteras erythemas figuratas maiores (erythema marginatum, erythema migrans, erythema gyratum repens).
Erythema annulare centrifugum (EAC) is an annular, erythematous lesion that appears as urticarial-like papules and enlarges centrifugally, then clears centrally. A fine scale is sometimes present inside the advancing edge, known as a trailing scale. Erythema annulare centrifugum is classified as a reactive erythema and has been associated with various underlying conditions, including malignancies. When erythema annulare centrifugum occurs as a paraneoplastic phenomenon, it has been designated PEACE (paraneoplastic erythema annulare centrifugum eruption). PEACE is more commonly seen in females, typically precedes the clinical diagnosis of malignancy, and may recur with subsequent relapses. EAC is one of the three major figurate erythemas, with EAC being the most common. These dermatoses share the common presentation of advancing erythematous, annular lesions, but are each separated by unique clinical and histopathologic characteristics. Once the other major figurate erythemas (erythema marginatum, erythema migrans, and erythema gyratum repens) are excluded, EAC often becomes a diagnosis of exclusion.
 Erythema annulare centrifugum - Case reports 23286811Erythema annulare centrifugum (EAC) terminus descriptivus est quod figuras circulares format et saepe cutem squamosam habet. Variæ causæ putantur provocare, sed quomodo fit incertum. Media, eruptio circiter XI menses durat. Discutimus de patiente qui EAC per 50 annos sine causa clara recidit. Dum in certis temporibus anni recurrit, hic casus longissimam nūntiātam duratiōnem EAC repraesentat.
Erythema annulare centrifugum (EAC) is a type of red rash that forms circular shapes and often has flaky skin. It's thought to be triggered by various factors, but we're not sure exactly how it happens. On average, the rash lasts for about 11 months. We discuss a patient who has had EAC coming back for 50 years without a clear reason. While it does seem to come back at certain times of the year, this case represents the longest reported duration of EAC.
 
In quavis aetate hae laesiones apparent sicut annuli rosei rubri vel notae bullae oculi elevatae. Pervagantur in magnitudine ab 0.5–8 cm (0.20–3.15 in). Laesiones interdum augent et per tempus dilatantur, nec possunt esse annuli integri, sed figurae irregulares.
Biopsia cutis perfici potest ad confirmandum morbum. Laesiones alicunde durare possunt cum media duratione 11 mensium. Solet curatio non eget, sed steroides topicae utiles possunt ad ruborem, tumorem, et pruritum reducere.