Alpha 1-antitrypsin deficiency differential diagnosis

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Mazia Fatima, MBBS [2]

Overview

Alpha 1-antitrypsin deficiency has to be differentiated from other conditions with similar presentation like autoimmune hepatitis, bronchiectasis, bronchitis, chronic obstructive pulmonary disease (COPD),cystic fibrosis,emphysema,primary ciliary dyskinesia (Kartagener Syndrome),viral hepatitis.

Differentiating Alpha 1-antitrypsin deficiency from Other Diseases

Alpha 1-antitrypsin deficiency presents with symptoms of

Differential diagnosis of jaundice and Right upper quadrant abdominal pain includes

Jaundice and RUQ pain differential diagnosis are:

Classification of jaundice based on etiology Disease History and clinical manifestations Diagnosis
Lab Findings Other blood tests Other diagnostic
Family history Fever RUQ Pain Pruritis Hepatomegaly AST ALT ALK BLR Indirect BLR Direct Viral serology
Jaundice Hepatocellular Jaundice Hemochromatosis + - -/+ - + ↑/N ↑/N N - Ferritin ↑ Liver biopsy
Wilson's disease + - -/+ - + N ↑/N N - Serum cerulloplasmin ↑ Liver biopsy
Alcoholic hepatitis - -/+ -/+ - + ↑↑ N ↑/N N - - -
Cirrhosis -/+ -/+ -/+ - -/+ ↑/N ↑/N ↑/N -/+ Low platate Small liver on ultrasond
Alpha 1-antitrypsin deficiency + -/+ -/+ - + ↑/N ↑/N ↑/N - Serum alpha1-antitrypsin levels decreased Hepatomegaly on CT
Cholestatic Jaundice Common bile duct stone -/+ - + + -/+ N N N - Dilated ducts on sono CT/ERCP
Hepatitis A cholestatic type - -/+ + + -/+ N N N + HAV- AB Abdominal ultrasound
EBV / CMV hepatitis - -/+ + + -/+ N N N + Positive serology
Primary biliary cirrhosis -/+ - -/+ + -/+ N/↑ N/↑ N - AMA positive Liver biopsy
Primary sclerosing cholangitis -/+ - -/+ + -/+ N/↑ N/↑ N - Beading on MRCP Liver biopsy
Pancreatic carcinoma + - -/+ - -/+ N/↑ N/↑ N - Mass on ultrasond CT scan for diagnosis

The differential diagnosis of jaundice, fever, and RUQ pain are:

Classification of jaundice based on etiology Disease History and clinical manifestations Diagnosis
Lab Findings Other blood tests Other diagnostic
Family history Fever RUQ Pain Pruritis Hepatomegaly AST ALT ALK BLR Indirect BLR Direct Viral serology
Jaundice Hepatocellular Jaundice Alcoholic hepatitis - -/+ -/+ - + ↑↑ N ↑/N N - - -
Cirrhosis -/+ -/+ -/+ - -/+ ↑/N ↑/N ↑/N -/+ Low platate Small liver on ultrasond
Alpha 1-antitrypsin deficiency + -/+ -/+ - + ↑/N ↑/N ↑/N - Serum alpha1-antitrypsin levels decreased Hepatomegaly on CT
Cholestatic Jaundice Hepatitis A cholestatic type - -/+ + + -/+ N N N + HAV- AB Abdominal ultrasound
EBV / CMV hepatitis - -/+ + + -/+ N N N + Positive serology PCR or ELISA
Diseases Symptoms Signs Diagosis
Fever Cough Chest pain Wheezes Crackles Tachypnea Lab tests Imaging
Asthma - Dry/Productive - + - +
Bronchiolitis +/- Dry - + + +/-
COPD + Productive - + + +
Bacterial pneumonia + Productive + + + +/-
Cystic Fibrosis +/- Productive +/- - - + Cystic fibrosis transmembrane conductance regulator (CFTR) dysfunction evidenced by :
  • Elevated sweat chloride ≥60 mmol/L (on two occasions)
  • Presence of two disease-causing mutations in CFTR, one from each parental allele
  • Abnormal nasal potential difference
Xray :

Hyperinflation presents as:

  • flattening of the diaphragm
  • anterior bowing of the infant sternum
  • increased retrosternal air space
  • generalized pulmonary overinflation.
  • Multiple nodular densities represent mucus plugging and may present in finger-in-glove shape or as a combination of V- or Y-shaped branching and bandlike shadows.

Abdominal findings include dilated multiple loops of the small bowel are seen in neonatal meconium ileus and in meconium ileus.

Emphysema +/- Productive - + +/- +
  • Arterial blood gas analysis: mild-to-moderate hypoxemia without hypercapnia that progresses to worsening hypoxemia and hypercapnia develops.
  • Chronic hypoxemia may lead to polycythemia.
  • Sputum is mucoid and the predominant cells are macrophages.
Chest X-ray reveals signs of emphysema include:
  • flattening of diaphragms
  • increased retrosternal air space (see on lateral chest films)
  • a long narrow heart shadow.
  • tapering vascular shadows
  • hyperlucency of the lungs
Primary Ciliary Dyskinesia (Kartagener Syndrome) +/- Productive - + + + Low or absent amount of nasal nitric oxide (nNO). mucociliary clearance may be useful for screening,

confirmation with tests of ciliary function and ultrastructure

Chest X-ray reveals :

Bronchial wall thickening

Bronchiectasis and hyperinflation

Cystic bronchiectasis with air-fluid levels may be visible

Usually involves the lower and middle lobes.

Alpha 1-antitrypsin deficiency +/- Productive - + + + Reduced concentration of serum alpha1-antitrypsin levels is diagnostic of AATD.

Moderate-to-severe airflow obstruction with an FEV1

Reduced vital capacity

Increased lung volumes secondary to air trapping (residual volume >120% of predicted value) are usually present

Chest Xray Alpha1-antitrypsin deficiency (AATD) emphysema presents as:
  • a hyperlucent appearance because healthy tissue has been destroyed.
  • Affected regions also are described as oligemic because they lack the normal rich pattern of branching blood vessels.
  • An unusual characteristic in alpha1-antitrypsin deficiency is found in about two thirds of PiZZ patients; the emphysema has a striking basilar distribution.
  • In contrast, cigarette smoking is associated with more severe apical disease.

AATD can present as neonatal jaundice. The diffrential diagnosis for neonatal jaundice is: [3]

Etiology Of Neonatal Jaundice History and clinical manifestations Diagnosis
Lab Findings Other blood tests Other diagnostic
Family history Fever RUQ Pain Pruritis AST ALT ALK BLR Indirect BLR Direct Viral serology
Alpha-1 antitrypsin deficiency + -/+ -/+ - N - Genetic testing Liver biopsy
Breast feeding failure jaundice - - - - - - - - - - -
Breast Milk Jaundice - - - - - - - - - - -
Crigler-Najjar type 2 + - - - N N N - Genetic testing
Gilbert Syndrome + - - - N N N - Genetic testing
Rotor syndrome + - - - N N N N - Genetic testing Liver biopsy
Dubin-Johnson syndrome + - - - N N N N - Genetic testing Liver biopsy
Hereditory spherocytosis + - -/+ - N N N N - Genetic testing Osmotic fragility
G6PD deficiency + - - - N N N N - Genetic testing
Thalassemia + - - - N N N N - Genetic testing
Sickle cell disease + - - - N N N N - Genetic testing
Immune hemolysis - -/+ - - N N N N - Autoantibodies

References

  1. Ghanei M, Tazelaar HD, Chilosi M, Harandi AA, Peyman M, Akbari HM; et al. (2008). "An international collaborative pathologic study of surgical lung biopsies from mustard gas-exposed patients". Respir Med. 102 (6): 825–30. doi:10.1016/j.rmed.2008.01.016. PMID 18339530.
  2. Lazović B, Svenda MZ, Mazić S, Stajić Z, Delić M (2013). "Analysis of electrocardiogram in chronic obstructive pulmonary disease patients". Med Pregl. 66 (3–4): 126–9. PMID 23653989.
  3. Fargo MV, Grogan SP, Saguil A (2017). "Evaluation of Jaundice in Adults". Am Fam Physician. 95 (3): 164–168. PMID 28145671.


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