Abnormal Alveolar Type Ii Pneumocyte Morphology C5539454
A condition where certain lung cells that produce surfactant have an abnormal structure. These cells are important for breathing. It may affect respiratory function and requires medical evaluation.
Key facts at a glance
- ICD-10
- J98.9
- ICD-11
- CA00.0
- Body system
- respiratory
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Low blood oxygen level
Reduced oxygen saturation in the blood (hypoxemia) detected through pulse oximetry or blood tests.
Seek immediate medical attention if experiencing severe difficulty breathing, confusion, or bluish discoloration of lips or fingertips.
Cyanosis
Bluish discoloration of the skin, lips, or nail beds due to inadequate oxygen in the bloodstream.
This is a medical emergency. Call emergency services immediately if cyanosis develops.
Shortness of breath
(respiratory)Difficulty breathing or feeling breathless, especially during physical activity or when lying flat.
Frequency: 70-80% of patients
Persistent dry cough
(respiratory)A chronic cough that does not produce significant mucus and persists over time.
Frequency: 65-75% of patients
Rapid breathing
(respiratory)Increased breathing rate (tachypnea) as the body attempts to compensate for reduced lung function.
Frequency: 40-50% of patients
Fatigue and weakness
(constitutional)Generalized tiredness, lack of energy, and feeling of weakness throughout the body.
Frequency: 35-45% of patients
Chest discomfort
(respiratory)Dull ache, pressure, or tightness in the chest area that may worsen with deep breathing.
Frequency: 20-30% of patients
Wheezing
(respiratory)High-pitched whistling sound during breathing, particularly when exhaling.
Frequency: 30-40% of patients
Fever
(constitutional)Elevated body temperature often accompanied by chills, suggesting inflammation or infection.
Frequency: 15-25% of patients
Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Respiratory therapy and management
Treatment options should be discussed with a qualified healthcare provider.
Surfactant replacement therapy
Exogenous surfactant administration to compensate for deficient or dysfunctional type II pneumocyte production. Particularly relevant in neonatal conditions or adult respiratory distress syndrome.
Retinoid therapy
Vitamin A derivatives that support type II pneumocyte differentiation and surfactant protein expression. May help restore normal epithelial cell function in certain interstitial lung diseases.
Additional treatment options
High-resolution CT imaging surveillance
Periodic HRCT scanning to monitor alveolar changes and assess progression of pneumocyte abnormalities. Helps guide treatment decisions and predict outcomes.
monitoringEnvironmental toxin avoidance
Elimination of exposure to airborne pollutants, occupational dusts, and chemical irritants that can worsen pneumocyte morphology. Includes wearing protective equipment in occupational settings.
lifestyleAntioxidant-rich nutritional support
Dietary supplementation with antioxidants including vitamin E, vitamin C, and selenium to reduce oxidative stress on alveolar epithelial cells and support type II pneumocyte function.
dietaryWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Abnormal Alveolar Type Ii Pneumocyte Morphology C5539454?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Raghu G, Remy-Jardin M, Myers JL, et al. Diagnosis of Idiopathic Pulmonary Fibrosis: An Official ATS/ERS/JRS/ALAT Clinical Practice Guideline. American Journal of Respiratory and Critical Care Medicine. 2018;198(5):e44-e68.
Mason RJ. Biology of alveolar type II cells. Respirology. 2006;11(Suppl):S12-S15.
Whitsett JA, Wert SE, Weaver TE. Alveolar surfactant homeostasis and the role of lipid synthesis. American Journal of Respiratory Cell and Molecular Biology. 2010;43(6):727-738.
Trapnell BC, Nakata K, Bonella F, et al. Pulmonary alveolar proteinosis. Nature Reviews Disease Primers. 2019;5(1):16.
Kuranishi LT, Leslie KO. Pathology and classification of interstitial lung disease. In: Schwarz MI, King TE Jr, eds. Interstitial Lung Disease. 5th ed. People's Medical Publishing House; 2011:39-77.
Nogee LM, deMello DE, Dehner LP, Colten HR. Deficiency of pulmonary surfactant protein B in congenital alveolar proteinosis. New England Journal of Medicine. 1993;328(6):406-410.
Wang J, Edeen K, Manzer R, et al. Differentiated human alveolar epithelial cells and their susceptibility to respiratory viruses. American Journal of Respiratory Cell and Molecular Biology. 2007;37(6):643-653.
Kurdowska AK. The 2015 Chinese guidelines for the management of interstitial lung disease: what you need to know. Chinese Medical Journal. 2015;128(21):2907-2914.
Hunninghake GM, Hatabu H, Okajima Y, et al. MUC5B promoter polymorphism and interstitial lung abnormalities. New England Journal of Medicine. 2013;368(23):2192-2200.
Katzenstein AL, Mukhopadhyay S, Myers JL. Diagnostic surgical pathology of the lung. In: Liebow AA, ed. Spencer's Pathology of the Lung. 6th ed. Cambridge University Press; 2013:129-234.
Medication Comparisons
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View Medication ComparisonsThis information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy