Interruption of the right middle and lower lobe pulmonary arteries combined with arterial aneurysm formation at the origin of the right subclavian artery branch: a case report - Report - MDSpire

Interruption of the right middle and lower lobe pulmonary arteries combined with arterial aneurysm formation at the origin of the right subclavian artery branch: a case report

  • By

  • Chengshi Hou

  • Guocheng Zhao

  • May 18, 2026

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Clinical Report: Interrupted Pulmonary Arteries with Subclavian Aneurysm

Overview

This report details a rare case of a 64-year-old female with interrupted pulmonary arteries in the right middle and lower lobes, complicated by an aneurysm at the right subclavian artery origin. The findings highlight the importance of imaging for diagnosis and the need for individualized treatment strategies.

Background

Interrupted pulmonary artery (IPA) is a rare congenital anomaly, primarily seen in children, but can present in adults with significant clinical implications. This condition can mimic chronic pulmonary embolism and is often associated with pulmonary hypertension and collateral circulation. Understanding its presentation and management is crucial for improving patient outcomes.

Data Highlights

Case study of a 64-year-old female with interrupted pulmonary arteries and subclavian aneurysm.

Key Findings

  • Patient presented with chest tightness and shortness of breath after physical activity.
  • Elevated D-dimer levels indicated potential thromboembolic events.
  • CT pulmonary angiography confirmed interruption of the right middle and lower lobe pulmonary arteries.
  • Extensive collateral circulation was observed, along with pulmonary hypertension.
  • An aneurysm was detected at the origin of the right subclavian artery.

Clinical Implications

Clinicians should maintain a high index of suspicion for vascular anomalies in patients presenting with unexplained respiratory symptoms. Imaging plays a critical role in diagnosis, and treatment should be tailored based on symptomatology and the presence of complications such as hemoptysis or pulmonary hypertension.

Conclusion

This case underscores the rarity of interrupted pulmonary arteries in adults and the importance of early recognition and appropriate management to enhance patient prognosis.

Related Resources & Content

  1. Frontiers in Cardiovascular Medicine, 2026 -- A case report of right coronary artery ligation in the treatment of adult - type anomalous origin of the right coronary artery from the pulmonary artery complicated with coronary heart disease
  2. Journal of Gastrointestinal Surgery, 2009 -- Uncommon Etiology of Dysphagia in Adults: The Role of Aberrant Right Subclavian Artery Compression
  3. Pediatric Cardiology, 2008 -- Coronary Artery Anomaly Originating from the Incorrect Sinus in a 15-Year-Old Male Patient
  4. Proximal Interruption of the Pulmonary Artery | Radiology, 2022 -- Proximal Interruption of the Pulmonary Artery
  5. BMC Pulmonary Medicine, 2024 -- Management of Pulmonary Artery Interruption
  6. Pediatric Cardiology — Utilization of 64-Slice CT Imaging to Prevent Misdiagnosis of Anomalous Left Main Coronary Artery Origin
  7. Proximal Interruption of the Pulmonary Artery Overview
  8. BMC Pulmonary Medicine
  9. Rupture of a mediastinal collateral aneurysm associated with unilateral absence of pulmonary artery - PMC

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