CASE 154

PA (Fig. 154.1) and lateral (Fig. 154.2) chest radiographs demonstrate a large, well-defined anterior mediastinal mass that extends predominantly to the left. Note the significant mass effect on the anterior trachea (Fig. 154.2). Contrast-enhanced chest CT (mediastinal window) (Figs. 154.3, 154.4) demonstrates a large, lobular, slightly heterogeneous anterior mediastinal mass with marked mass effect on the great vessels and the airways.

Diagnosis

Thymic Carcinoid

Differential Diagnosis

• Thymoma

• Thymic Carcinoma

• Lymphoma

• Seminoma

Fig. 154.3

Fig. 154.4

Discussion

Background

Thymic carcinoid is a rare primary malignant neuroendocrine thymic neoplasm.

Etiology

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