Primary cutaneous anaplastic large cell lymphoma (PC-ALCL) is a rare non-Hodgkin’s lymphoma that arises as a single, or multiple dome-shaped tumours on the skin. The histology is characterised by the presence of atypical lymphocytes with large irregularly shaped nuclei that express the surface marker CD30. There can be significant heterogeneity in clinical manifestation and histological pattern and in rare cases accurate diagnosis can be a challenge. Here, we present an unusual case presentation of cutaneous CD30+ anaplastic large cell lymphoma with significant granulomatous histology pattern that mimicked sarcoid. After a lack of durable response to treatments that included glucocorticoid and methotrexate, targeted treatment with anti-CD30 monoclonal antibody drug conjugate (brentuximab vedotin) yielded long-term clinical remission.
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