[Thymic carcinoid with lymph node metastases; report of a case]

Area of Science:

• Oncology
• Nuclear Medicine

Background:

• Anterior mediastinal tumors require accurate diagnostic methods for staging and treatment planning.
• Thymic carcinoid is a rare neuroendocrine tumor originating in the thymus.
• Metastasis to lymph nodes significantly impacts prognosis and therapeutic strategies.

Observation:

• A 71-year-old male presented with an anterior mediastinal tumor.
• Fluorodeoxyglucose-positron emission tomography (FDG-PET) revealed abnormal uptake in the primary tumor and regional lymph nodes (hilar and supraclavicular).
• Percutaneous needle biopsy confirmed thymic carcinoid.

Findings:

• Surgical resection and lymph node dissection were performed based on FDG-PET findings suggestive of metastasis.
• Postoperative pathology confirmed atypical carcinoid with metastases to mediastinal and supraclavicular lymph nodes.
• FDG-PET demonstrated high utility in identifying both the primary thymic carcinoid and lymph node involvement.

Implications:

• FDG-PET serves as a valuable tool for the diagnosis and staging of thymic carcinoid.
• Clinical studies involving multiple institutions are needed to validate FDG-PET's diagnostic role.
• Further research on the efficacy of postoperative chemo-radiation therapy for thymic carcinoid is warranted.