Diffuse idiopathic pulmonary neuroendocrine cell hyperplasia: Unusual presentation

Area of Science:

• Pulmonary Medicine
• Oncology
• Immunology

Background:

• Diffuse idiopathic pulmonary neuroendocrine cell hyperplasia (DIPNECH) is characterized by abnormal proliferation of pulmonary neuroendocrine cells without a clear cause.
• While DIPNECH is known to have premalignant potential and is associated with lung cancers, its link to autoimmune conditions is not previously reported.

Observation:

• A unique case of a 55-year-old female presenting with DIPNECH, thymoma, and a history of Crohn's disease is detailed.
• The co-occurrence of these conditions suggests a possible underlying autoimmune phenomenon.
• This is the first reported instance of DIPNECH associated with both thymoma and Crohn's disease.

Findings:

• The study presents a novel association between DIPNECH, thymoma, and Crohn's disease.
• This case suggests that autoimmune processes may play a role in the development or manifestation of DIPNECH.
• The presence of multiple lung nodules and small airway disease should prompt consideration of DIPNECH in differential diagnoses.

Implications:

• This finding broadens the understanding of DIPNECH's potential etiologies and associations.
• Physicians should consider autoimmune links in patients with DIPNECH, especially those with concurrent thymoma or inflammatory bowel disease.
• Early diagnosis of DIPNECH is crucial due to its premalignant potential and variable prognosis, which depends on associated malignancies and airflow obstruction severity.