CA44

ICD-11 MMS 2026-01

Pyothorax

Description

Suppurative inflammation of the pleural space, typically due to acute bacterial infection. It can occur as a complication of pneumonia, thoracotomy, abscesses (lung, hepatic, or subdiaphragmatic), or penetrating trauma with a secondary infection.

Index terms

  • Pyothorax
  • acute pyothorax
  • empyema
Show allHide
  • Pyothorax with fistula
  • chest fistula NOS
  • empyema with fistula
  • empyema with thoracic fistula
  • pleural empyema with fistula
  • thoracic abscess with fistula
  • thoracic fistula
  • Abdominothoracic fistula
  • thoracoabdominal fistula
  • Bronchial fistula
  • bronchus fistula
  • Broncho-oesophageal fistula
  • bronchoesophageal fistula
  • oesophagobronchial fistula
  • Bronchopleural fistula
  • Bronchovisceral fistula
  • Fistula of costal region
  • Chest wall fistula
  • Hepatopulmonary fistula
  • Chest abscess with fistula
  • Hepatopleural fistula
  • Lung fistula
  • pulmonary fistula
  • Mediastinum fistula
  • mediastinal fistula
  • Mediastinobronchial fistula
  • Oesophagopleural-cutaneous fistula
  • Pleural abscess with fistula
  • Mediastinocutaneous fistula
  • Oesophagotracheal fistula
  • tracheoesophageal fistula
  • Pulmonoperitoneal fistula
  • Pyopneumothorax fistula
  • Thoracogastric fistula
  • Thoracointestinal fistula
  • Pyothorax without fistula
  • chest empyema
  • thoracic empyema
  • Abscess of pleural cavity
  • pleural abscess
  • thoracic abscess
  • Supradiaphragmatic empyema
  • Staphylococcal pleurisy
  • Acute staphylococcal pleurisy
  • Chronic staphylococcal pleurisy
  • Subacute staphylococcal pleurisy
  • Staphylococcal adhesive pleurisy
  • Staphylococcal double pleurisy
  • Staphylococcal fibrinous pleurisy
  • Empyema of lung
  • Empyema of pleura
  • loculated empyema
  • pleural empyema
  • Chest abscess
  • Pneumopyothorax
  • pyopneumothorax
  • Septic pleurisy
  • Seropurulent pleurisy
  • purulent pleurisy
  • suppurative pleurisy
  • Tension pyopneumothorax
  • tension pyothorax

Inclusions

  • empyema

Excludes

  • 1B10.Z – due to tuberculosis

Exclusions from above levels

  • 01 – Certain infectious or parasitic diseases
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
Show allHide
  • 19 – Certain conditions originating in the perinatal period
  • 20 – Congenital malformations, deformations and chromosomal abnormalities
  • 22 – Injury, poisoning or certain other consequences of external causes

Sibling codes

  • CA40 – Pneumonia
  • CA41 – Acute bronchiolitis
  • CA42 – Acute bronchitis
  • CA43 – Abscess of lung or mediastinum
  • CA45 – Respiratory infections, not elsewhere classified
  • CA4Y – Other specified lung infections
  • CA4Z – Lung infections, unspecified

Foundation entity

Pyothorax – http://id.who.int/icd/entity/1103848959

Allowed postcoordination axes

Part of: 12: Diseases of the respiratory system