Related Experiment Video
Updated: Dec 7, 2025

Pathological Analysis of Lung Metastasis Following Lateral Tail-Vein Injection of Tumor Cells
Published on: May 20, 2020
Pulmonary Tumor Thrombotic Microangiopathy: Case Report and Literature Review
1Linkou Chang Gung Memorial Hospital Department of Emergency Medicine Taoyuan Taiwan.
Abstract:
Pulmonary tumor thrombotic microangiopathy (PTTM) is a rapidly progressive pulmonary disease complicated by malignancy. It manifests clinically as respiratory distress with pulmonary hypertension, progressive right sided heart failure, and sudden death. We describe a case of PTTM associated with metastatic gastric carcinoma. This case demonstrates the diagnostic diffi culties in such a rare and rapidly fatal oncological complication. More awareness among clinicians may help make a right diagnosis in the short time available. We also review the literatures to demonstrate the clinical characteristics that might provide clues towards an antemortem diagnosis, and may provide the key in treating PTTM.
Insights
Pulmonary tumor thrombotic microangiopathy (PTTM) is a rare cancer complication causing respiratory distress and heart failure. Early recognition of clinical clues is vital for timely diagnosis and treatment of this fatal condition.
Area of Science:
- Oncology
- Pulmonology
- Pathology
Background:
- Pulmonary tumor thrombotic microangiopathy (PTTM) is a rare and aggressive complication of malignancy.
- It presents with severe respiratory distress, pulmonary hypertension, and right-sided heart failure, often leading to sudden death.
Observation:
- This report details a unique case of PTTM associated with metastatic gastric carcinoma.
- The case highlights the significant diagnostic challenges posed by this rare oncological emergency.
Findings:
- PTTM diagnosis is often delayed due to its rarity and rapid progression.
- Identifying specific clinical characteristics may aid in achieving an antemortem diagnosis.
Implications:
- Increased clinician awareness of PTTM is crucial for prompt diagnosis.
- Understanding PTTM's clinical features can guide treatment strategies and improve patient outcomes.

