This is a similar condition histologically, but it typically occurs on sun-exposed skin and results in central atrophy, which is not a feature of classic GA.
The plaques of sarcoidosis are typically more reddish-brown or violaceous and have a characteristic "apple-jelly" appearance on diascopy.
This is a hard, rock-like deposit of calcium, not a dermal infiltrate forming an annular plaque.
These are multiple, yellowish papules related to hyperlipidemia, not an annular, skin-colored plaque.
Tuberculoid leprosy can present as an annular, anesthetic plaque with palpable nerves, and is confirmed by biopsy and staining for acid-fast bacilli.
Annular mycosis fungoides is a form of CTCL, distinguished by its thin, slightly atrophic appearance and potential for progression.
This is a variant of GA, presenting as multiple small papules rather than a classic annular ring.
These are deep, firm, subcutaneous nodules, typically over joints or pressure points, not a superficial, annular dermal plaque.
This presents as deep, firm nodules, similar to rheumatoid nodules, not as the annular dermal plaques of classic GA.
