Rare diseases · Sign or symptom
Pneumonia
HP:0002090
What it means
Inflammation of any part of the lung parenchyma.
In everyday care
Most people with this sign do not have a rare disease — it appears in common conditions far more often. These general reference pages cover the same topic:
Rare diseases that can present with this76
Very common80–99%
7Common30–79%
26- Acute lung injury
- Alpha-mannosidosis, infantile form
- Autoimmune lymphoproliferative syndrome due to CTLA4 haploinsuffiency
- Autosomal dominant severe congenital neutropenia
- Bickerstaff brainstem encephalitis
- Bronchial neuroendocrine tumor
- Bronchiolitis obliterans
- Coccidioidomycosis
- Combined immunodeficiency due to ZAP70 deficiency
- Fusariosis
- Hereditary bullous dystrophy, macular type
- Leukocyte adhesion deficiency
- Melioidosis
- Neonatal alloimmune neutropenia
- Nocardiosis
- Non-syndromic agammaglobulinemia
- Omenn syndrome
- RIDDLE syndrome
- Rigid spine syndrome
- Scedosporiosis
- Severe disseminated cytomegalovirus infection in immunocompetent patients
- T-cell immunodeficiency with thymic aplasia
- Tracheobronchopathia osteochondroplastica
- Tularemia
- WHIM syndrome
- X-linked centronuclear myopathy
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
Tracking symptoms like this for someone? Eleplan keeps symptoms, diagnoses, medications and every specialist in one plan.
Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.