Spontaneous resolution of lung opacities reported as metastases in a patient with a history of leiomyosarcoma

This is a case of a 69-year-old woman who was diagnosed as having metastatic leiomyosarcoma. She presented with multiple lung opacities on plain films and CT scans following resection of a high-grade leiomyosarcoma of the uterus 16 months earlier. The radiological, oncology, gynaecology and respiratory teams diagnosed metastatic cancer on the basis of the clinical presentation and radiological appearance. Surprisingly, despite no treatment, there was gradual resolution of the lung lesions on plain films. A CT scan 18 months later showed full resolution of the lesions. The consultants from the various specialities involved in this case were unable to give a satisfactory explanation as to why these lesions resolved.