Radiologic Evaluation of Thoracic Neuroendocrine Neoplasms

Area of Science:

• Oncology
• Radiology
• Pathology

Background:

• Thoracic neuroendocrine neoplasms (NENs) present a wide range of malignancy, from indolent carcinoids to aggressive carcinomas.
• Accurate diagnosis of thoracic NENs is difficult due to variable imaging features and tumor rarity.
• Incidental discovery often leads to delayed diagnosis of these pulmonary and mediastinal tumors.

Purpose of the Study:

• To provide a comprehensive overview of thoracic NENs, encompassing their diverse subtypes and associated conditions.
• To highlight the critical role of imaging modalities like CT and PET in the noninvasive assessment of thoracic NENs.
• To integrate imaging, clinical, and pathological findings with case examples for improved diagnostic accuracy.

Main Methods:

• Review of literature on pulmonary and mediastinal neuroendocrine neoplasms.
• Analysis of imaging characteristics (CT, PET) for various thoracic NEN subtypes.
• Correlation of imaging findings with clinical presentation and histopathology.

Main Results:

• Thoracic NENs include carcinoids, neuroendocrine carcinomas, thymic NENs, paragangliomas, and metastatic NENs.
• Imaging features can be nonspecific, posing diagnostic challenges.
• Association with genetic syndromes like multiple endocrine neoplasia and SDH deficiency is noted.

Conclusions:

• Accurate diagnosis and staging of thoracic NENs rely heavily on integrated imaging, clinical, and pathological data.
• Understanding the spectrum of thoracic NENs and their imaging manifestations is key for timely and confident diagnosis.
• This review aims to enhance diagnostic capabilities for these rare and complex neoplasms.