Inflammatory pseudotumor of the thymus.

Area of Science:

• Thoracic Surgery
• Pathology
• Oncology

Background:

• Inflammatory pseudotumor is a rare condition characterized by benign inflammatory lesions.
• The thymus, a primary lymphoid organ, is rarely affected by inflammatory pseudotumor.

Observation:

• A 44-year-old male presented with fever, myalgia, and dyspnea.
• Imaging revealed an anterior mediastinal mass and bilateral pleural effusions.
• The resected mass was a well-circumscribed lesion of chronic inflammatory and fibrous tissue, replacing the thymus.

Findings:

• Histopathological examination showed no evidence of neoplasia.
• The resected lesion was consistent with inflammatory pseudotumor of the thymus.
• Surgical excision of the thymic mass led to complete resolution of the patient's symptoms and radiographic abnormalities.

Implications:

• This case represents the first documented instance of inflammatory pseudotumor originating in the thymus.
• It highlights the importance of considering inflammatory pseudotumor in the differential diagnosis of anterior mediastinal masses.
• Complete surgical resection is an effective treatment for thymic inflammatory pseudotumor, leading to favorable outcomes.