Pericardial involvement as an initial presentation of anaplastic large cell lymphoma.

Anaplastic large cell lymphoma (ALCL) is a CD30-positive neoplasm of either T-cell or null-cell lineage accounting for 2% to 8% of all lymphomas.[1][1] Most frequently, patients with ALCL present with advanced disease with extranodal involvement.[2][2] The central nervous system (CNS) (30%),