A Rare Case of Rectosigmoid Small Cell Carcinoma

Area of Science:

• Oncology
• Gastroenterology
• Pathology

Background:

• Colorectal small cell carcinoma (CSCC) is an exceptionally rare neuroendocrine malignancy.
• CSCC is characterized by aggressive behavior, high recurrence rates, and a poor prognosis.
• Limited literature exists, leading to a lack of consensus on optimal management strategies.

Observation:

• This case report focuses on a 74-year-old male patient with no prior significant health issues.
• The patient presented with a large (112 mm) rectosigmoid small cell carcinoma.
• Radiological imaging confirmed metastatic disease at presentation.

Findings:

• The case highlights the clinical presentation and radiological features of a rare, aggressive CSCC.
• The tumor's significant size and metastatic nature at diagnosis are key findings.
• The report underscores the challenges in diagnosing and managing this rare entity.

Implications:

• This case contributes to the limited understanding of colorectal small cell carcinoma.
• It emphasizes the need for early diagnosis and tailored therapeutic approaches.
• The report aims to inform current diagnostic and treatment recommendations for CSCC.