Pulmonary Tumor Thrombotic Microangiopathy: Clinical, Radiologic, and Histologic Correlation

Area of Science:

• Oncology
• Pathology
• Cardiology

Background:

• Pulmonary tumor thrombotic microangiopathy (PTTM) is a vascular disorder characterized by tumor emboli in pulmonary arteries.
• It triggers coagulation, fibrocellular intimal thickening, and pulmonary hypertension, often leading to cor pulmonale.
• PTTM is frequently associated with adenocarcinomas, but its presentation as an initial manifestation of gastric cancer is uncommon.

Purpose of the Study:

• To report a rare case of PTTM as the initial clinical manifestation of metastatic gastric carcinoma.
• To illustrate the clinical, radiological, and histological features of this unusual presentation.
• To enhance understanding of PTTM in the context of gastric cancer metastasis.

Main Methods:

• Case report presentation.
• Review of clinical history, imaging findings (radiological), and histopathological examination.
• Analysis of the diagnostic and therapeutic challenges.

Main Results:

• A young male patient presented with PTTM as the first sign of metastatic gastric carcinoma.
• Clinical, radiological, and histological findings were consistent with PTTM secondary to gastric cancer.
• The case underscores the importance of considering PTTM in unexplained pulmonary hypertension, especially with a history or suspicion of malignancy.

Conclusions:

• PTTM can be the initial presentation of metastatic gastric carcinoma, even in young patients.
• Early recognition of PTTM is crucial for timely diagnosis and management of the underlying malignancy.
• This case emphasizes the diverse clinical spectrum of gastric cancer metastasis.