Lymphocytic interstitial pneumonia

What it means

Lymphocytic interstitial pneumonitis is a benign lymphoproliferative disorder of the lung that is characterized by the presence of a dense, predominantly lymphocytic interstitial infiltrate (lymphocytes, plasma cells, other elements of the lymphoreticular system) that expands the alveolar septa.

Lymphocytic interstitial pneumonitis is assumed to be a pathological immunologic response to different triggers and are particularly associated with autoimmune and infectious diseases as well as immunodeficiency. Associated clinical manifestations often include fever, cough, and shortness of breath.

Rare diseases that can present with this4

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Lymphocytic interstitial pneumonitis · Lymphoid interstitial pneumonia · Lymphoid interstitial pneumonitis