Intrathoracic paravertebral malignant paraganglioma

Area of Science:

• Pathology
• Oncology
• Endocrinology

Background:

• Intrathoracic paravertebral paragangliomas are rare tumors.
• Review of clinical and pathologic features is essential for diagnosis and management.

Observation:

• Thirty-one cases, including the current one, are reported in English literature.
• Average patient age is 29 years (20 males, 11 females).
• 48% of patients had symptoms of catecholamine excess; 22% had multiple paragangliomas.

Findings:

• Complete surgical resection offers a favorable prognosis for some patients.
• Local invasion and spinal cord compression occurred in some cases.
• Malignant behavior with distant metastases was observed in two patients.
• Grimelius stain aids in diagnosis by showing cytoplasmic argyrophilia.
• Electron microscopy reveals neurosecretory granules.

Implications:

• Paravertebral paragangliomas require differentiation from aorticopulmonary paragangliomas due to distinct clinical and pathologic features.
• Accurate diagnosis impacts patient management and prognosis.
• Understanding catecholamine secretion is crucial for symptomatic patients.