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Carcinoid tumor with skin metastasis
1Group of Pathology, National Institute of Health, Bogotá, Colombia.
The American Journal of Dermatopathology
|June 1, 1992
Summary
This study reports a rare case of carcinoid tumor metastasis to the skin, causing painful nodules. The pain was linked to tumor cells invading nerves, a novel finding in cutaneous carcinoid tumors.
Area of Science:
- Oncology
- Dermatology
- Pathology
Background:
- Carcinoid tumors are rare neuroendocrine neoplasms that can metastasize to various organs.
- Cutaneous metastases from carcinoid tumors are exceptionally uncommon, presenting diagnostic challenges.
Observation:
- An 80-year-old male presented with multiple painful cutaneous nodules on his trunk and limbs.
- Histopathology, immunohistochemistry (chromogranin), and electron microscopy confirmed metastatic carcinoid tumor.
- Numerous Langerhans cells were observed within the tumor nodules.
Findings:
- The study establishes a correlation between spontaneous and pressure-induced pain in the nodules and perineural invasion by tumor cells.
- This is the first reported instance linking pain in cutaneous carcinoid metastases to direct neural involvement and sectioning by tumor cells.
- The probable origin of the carcinoid tumor was identified as the gastric antrum.
Implications:
- This case highlights the importance of considering cutaneous carcinoid metastasis in patients with unexplained painful skin nodules.
- Understanding the mechanism of pain, involving perineural invasion, can guide symptom management in similar rare cases.
- The presence of Langerhans cells may warrant further investigation into their role in the tumor microenvironment.