Detailed Instructions: Given an abstract, generate a keyword (a noun phrase) that best describes the focus or contribution of the paper. Such keywords can be directly from the given abstract or outside it.
Q: Abstract: A 57-year-old woman with bilateral pneumothoraces secondary to pulmonary metastases from leiomyosarcoma of the uterus was treated successfully by intrapleural instillation of tetracycline.
A:
Case Report