Related Experiment Video
Updated: May 29, 2026
08:01
Generation and Expansion of Primary, Malignant Pleural Mesothelioma Tumor Lines
Published on: April 21, 2022
Malignant melanoma presenting as an isolated pleural effusion
Summary
Malignant melanoma rarely presents as isolated pleural effusion. This case highlights a primary pleural melanoma diagnosed via pleural fluid analysis, with positive patient response to treatment.
Area of Science:
- Oncology
- Pulmonology
- Pathology
Background:
- Malignant melanoma typically arises from the skin, but can occur in extrermal sites.
- Pleural effusion is an uncommon manifestation of metastatic melanoma.
Observation:
- A 46-year-old male presented with shortness of breath and right-sided pleural effusion on computed tomography.
- No primary skin lesion or mediastinal lymphadenopathy was identified.
- Pleural fluid cytology revealed pigmented cells positive for melanoma markers (HMB-45, S-100).
Findings:
- Diagnosis of primary malignant melanoma of the pleura was established.
- The patient had no history of melanoma or visible skin lesions.
- Immunohistochemical staining confirmed melanoma in pleural fluid.
Implications:
- This case underscores the importance of considering rare diagnoses in unexplained pleural effusions.
- Early diagnosis and treatment of primary pleural melanoma can lead to favorable outcomes.
- Highlights the diagnostic utility of pleural fluid cytology and immunohistochemistry in oncology.
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