Adenocarcinoma of the lung laboratory findings

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Shanshan Cen, M.D. [2] Sudarshana Datta, MD [3]

Laboratory findings consistent with the diagnosis of adenocarcinoma of the lung include low pH, increased arterial pCO2, decreased arterial pO2, increased serum calcium, tumor cells in sputum and pleural effusion.

• The laboratory findings in a patient with adenocarcinoma of the lung include:
  • CBC:^[1]
    • Neutropenia in patients with a recent history of chemotherapy
  • Serum electrolytes:^[1]
    • Increased serum calcium
  • Arterial blood gas (ABG):
    • Low pH
    • Increased arterial pCO2
    • Decreased arterial O2

• Sputum cytology:
  • Sputum cytology demonstrates tumor cells
• Needle thoracentesis:
  • Pleural effusion cytology demonstrates tumor cells

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