CTICasesCollision Tumor: Pulmonary Hamartoma and Adenocarcinoma
Imaging findings
An initial chest radiograph depicted a subtle nodule. Nine months later, a follow-up CT revealed two adjacent lesions: a solid nodule consistent with a hamartoma (which showed no FDG uptake on PET) and an inferior, previously vague, lesion that had solidified, proven to be an invasive adenocarcinoma (highly FDG-avid on PET).
Key takeaways
This case illustrates a rare "collision tumor" where a benign pulmonary hamartoma coexists adjacent to an adenocarcinoma. While they appeared as separate entities here, there is a recognized association where carcinomas can arise within or adjacent to hamartomas. The subtle initial radiographic findings highlight the need for careful follow-up.
AI-assisted summary — may contain errors. Verify against the source video. Learn more
More from this webinar
- Mitral Valve Stenosis with Thrombus, Unroofed Coronary Sinus, Azygos Continuation, and Tracheal/Bronchial CalcificationCongenital
- Hypoglossal Nerve Stimulator for Obstructive Sleep ApneaIatrogenic
- Disseminated Mycobacterium avium Complex (MAC) Infection (Pulmonary and Sinus)Infection
- Broncholithiasis (Three Cases)Infection
- Macroscopic Air Emboli to Pulmonary ArteriesVascular
- Mediastinal/Epicardial Nodular Fat Necrosis (or Necrosed Lipoma)Inflammatory
- Boerhaave Syndrome (Esophageal Rupture)Trauma
- Pulmonary Mercury Embolization (from IV Injection)Exposure
See all cases from June 17, 2016 →
Related Neoplastic cases
- Right Atrial Myxoma with Atypical MRI Characteristics
- Benign Metastasizing Leiomyoma to the Lung
- Mediastinal Metastasis from Breast Cancer simulating Thymic Rebound
- Post-Transplant Lymphoproliferative Disorder (PTLD) isolated to Native Lung
- Pleural Lymphoma with Post-Treatment Calcification
- Breast Cancer Recurrence (Internal Mammary Lymph Node Metastasis)