Sarcoidosis: An atypical mimicker of acne keloidalis nuchae

Sarcoidosis Coexisting With Distinct Forms of Alopecia on the Scalp: A Case Series

“…12 Typically, in these instances, the correct diagnosis is discovered on H&E, where an abundance of noncaseating granulomas with sparse surrounding infiltrate can be visualized filling the dermis and sometimes obliterating follicular structures. 4–10 The 2 cases discussed in our series are the first in the literature to show sarcoidosis present concurrently with a distinct, primary histological pattern as alopecia. In both cases, the clinical presentation resembled the underlying nonsarcoidal pathology DLE and alopecia areata.…”

“…1,4 Furthermore, just as sarcoidosis is known as a mimicker of various cutaneous disorders, it has also been documented as a mimicker of several alopecias including acne keloidalis nuchae, discoid lupus erythematosus (DLE), frontal fibrosing alopecia, lichen planopilaris, and alopecia areata totalis. 4–10 In this case series, we present 2 novel cases of sarcoidosis not just clinically mimicking other forms of alopecia but occurring in conjunction with a separate and histologically distinct primary alopecia.…”