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Updated: Feb 17, 2026

A 3D Organotypic Melanoma Spheroid Skin Model
Published on: May 18, 2018
Recurrence of malignant melanoma presenting as black-colored pyopneumothorax: a rare entity
Ganesh Patel1, Anil Saxena, Suman Khangarot
1Dr. Ganesh Patel, Department of Respiratory Medicine,, Samleshwari gali 3, rajiv nagar kotra road,, raigarh chattisgarh 496001, India, T: 0744247142, sanju150987@gmail.com, ORCID: http://orcid.org/0000-0003-11289682.
Abstract:
We report a 63-year-old patient with black-colored pus (pyopneumothorax) resulting from an infected pleural effusion associated with metastatic malignant melanoma of the skin. The patient was also positive for Pseudomonas, so the color was unexpected. Although rare, malignant melanoma can present as a black pleural effusion due to the presence of melanocytes in the pleural fluid. Black pleural fluid should raise the suspicion of malignant melanoma.
Similar Cases Published:
Nine cases of black pleural effusion due to different causes have been reported.1,2 Three cases of black pleural effusion due to metastatic malignant melanoma are published.2,6,7.
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