Pleural Non-Hodgkin Lymphoma

**Semantic type:** Neoplastic Process

**Definition:** A rare extranodal non-Hodgkin lymphoma that arises from the pleura with no evidence of involvement of other sites at the time of diagnosis. This category includes primary effusion lymphoma, pyothorax-associated lymphoma, and exceedingly rare cases of mucosa-associated lymphoid tissue lymphoma.

**Synonyms:** - Pleural Lymphoma - Primary Pleural Lymphoma - Primary Pleural Non-Hodgkin Lymphoma