[ 18 F]FDG PET/CT in Primary Angiosarcoma of the Thyroid

Area of Science:

• Oncology
• Pathology
• Radiology

Background:

• Thyroid angiosarcoma is a rare malignancy, accounting for less than 1% of all thyroid cancers.
• It is known for its aggressive nature and rapid progression.

Purpose of the Study:

• To present a case of thyroid angiosarcoma in a 58-year-old male patient.
• To discuss the diagnostic challenges and management implications of this rare tumor.

Main Methods:

• [18F]FDG PET/CT imaging to assess metabolic activity and metastatic spread.
• Ultrasound-guided fine-needle aspiration for cytologic evaluation.
• Histopathologic analysis with immunohistochemistry (ERG, CD34) for definitive diagnosis.

Main Results:

• The patient presented with cervical lymphadenopathy, hemoptysis, and dysphagia.
• [18F]FDG PET/CT showed a hypermetabolic, necrotic thyroid mass with extensive metastases.
• Histopathology confirmed poorly differentiated angiosarcoma with vascular markers.

Conclusions:

• Thyroid angiosarcoma is a rare and aggressive cancer requiring prompt diagnosis.
• Multimodality imaging and histopathology are crucial for accurate diagnosis.
• Early diagnosis and aggressive treatment are vital for managing this challenging malignancy.