Diffuse Idiopathic Pulmonary Neuroendocrine Cell Hyperplasia (DIPNECH): An Underrecognized Lung Disease

Respiratory medicine investigators have shed new light on a previously underdiagnosed lung disease known as Diffuse Idiopathic Pulmonary Neuroendocrine Cell Hyperplasia (DIPNECH). This condition often masquerades as asthma or chronic obstructive pulmonary disease (COPD), causing delays in diagnosis even in patients with classic risk factors such as middle-aged, non-smoking females. DIPNECH's early symptoms, including chronic cough, wheezing, and dyspnea, are deceptively nonspecific, making it challenging to identify the condition. A recent study, published in Respiratory Medicine Case Reports, highlights the importance of recognizing DIPNECH early to prevent irreversible airflow obstruction.

Key Takeaways:

• DIPNECH is an underrecognized lung disease that can be misdiagnosed as asthma or COPD.
• The condition often presents with nonspecific symptoms such as chronic cough, wheezing, and dyspnea in middle-aged, non-smoking females.
• DIPNECH's hallmark feature is airway-centered neuroendocrine cell proliferation, which can exist with or without tumorlets or progression to carcinoid tumors.
• Untreated DIPNECH can result in irreversible airflow obstruction, emphasizing the need for early recognition and intervention.
• The condition may respond to bronchodilators or corticosteroids, but timely diagnosis is crucial to prevent long-term consequences.
• DIPNECH deserves consideration in the differential diagnosis when common respiratory conditions do not fully explain the clinical picture.

Statistics:

• The study notes that DIPNECH can occur in individuals with classic risk factors, such as middle-aged, non-smoking females.
• The condition often presents with nonspecific symptoms, which can lead to delays in diagnosis, even in experienced clinicians.
• A hallmark feature of DIPNECH is airway-centered neuroendocrine cell proliferation, which can exist with or without tumorlets or progression to carcinoid tumors.
• The study highlights the need for early recognition and intervention to prevent irreversible airflow obstruction in individuals with DIPNECH.

Sources:

• DIPNECH: The neuroendocrine enigma behind persistent respiratory symptoms in the post-COVID era. Respiratory Medicine Case Reports, 2025,58():102290.
• Northwest Medical Center, Department of Internal Medicine
• Vijay Sam Nethala (Department of Internal Medicine, Northwest Medical Center, Tucson, AZ, United States)
• Abhinav Mittal, Rammohan Marla, Felix Reyes