| http://www.w3.org/ns/prov#value | - Patients with chronic empyemas, most notably tuberculous empyemas, can develop pyothorax-associated lymphoma (PAL), which is a body cavity primary lymphoma.71,72 Most of these tumors are non-Hodgkin lymphomas, which have been reported in 2.2% of patients with chronic empyemas in Japan.73
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