Update in pulmonary carcinoid tumors: a review article

Area of Science:

• Oncology
• Pulmonology
• Pathology

Background:

• Pulmonary carcinoid tumors are neuroendocrine neoplasms representing 1-2% of all lung tumors.
• These tumors are classified histopathologically into typical carcinoids (TC) and atypical carcinoids (AC), forming a spectrum of neuroendocrine tumor malignancy.
• Familial cases are uncommon, and common symptoms include hemoptysis, cough, and dyspnea.

Purpose of the Study:

• To provide a comprehensive overview of pulmonary carcinoid tumors, including their classification, clinical presentation, diagnostic methods, and treatment strategies.
• To discuss the prognostic differences between typical and atypical carcinoids.
• To highlight the role of various diagnostic and therapeutic modalities.

Main Methods:

• Review of histopathologic criteria for classification.
• Description of common clinical symptoms and rare paraneoplastic syndromes.
• Discussion of diagnostic tools such as flexible bronchoscopy, biopsy, and immunoscintigraphy.
• Analysis of treatment options including surgical resection, radiotherapy, and chemotherapy.

Main Results:

• Pulmonary carcinoids are categorized into typical (TC) and atypical (AC) subtypes based on histopathology.
• Symptoms commonly include cough, hemoptysis, and shortness of breath; paraneoplastic syndromes are rare.
• Surgical resection is the preferred treatment, with TC generally having a better prognosis than AC.

Conclusions:

• Pulmonary carcinoid tumors require accurate diagnosis and tailored treatment based on subtype.
• Surgical intervention offers a favorable prognosis for typical carcinoids, while atypical carcinoids present a greater challenge.
• The optimal role of adjuvant therapies like radiotherapy and chemotherapy remains an area for further investigation.