Pleural Effusion as the Initial Presentation of Gastric Adenocarcinoma: A Case Report.

BACKGROUND Gastric adenocarcinoma is a common malignancy, representing the third most common cause of cancer-related death globally. Most patients are initially asymptomatic, but as the cancer progresses, patients typically present with vague gastrointestinal complaints, including early satiety, heart burn, vomiting, or abdominal pain. Metastatic gastric cancer is relatively uncommon, with ~26% of patients having metastasis to a single site and 13% having metastases to multiple sites.

as a cause of cavitary lung disease in systemic lupus erythematous.

Legionnaire's disease (LD) is most commonly caused by Legionella pneumophila (L. pneumophila). In immunocompromised patients LD can cause necrosis of the lung parenchyma with abscess formation and cavitation.