Soft tissue sarcomas are a rare group of malignancies which arise from smooth muscle cells. Leiomyosarcomas arising from anterior mediastinum is rarely reported in the literature. The current COVID-19 pandemic has caused unprecedented havoc worldwide. It is also causing delay in diagnosis of other diseases. Herein we report a case of an elderly male who was managed as a case of COVID pneumonia and on follow-up review in post COVID clinic was diagnosed to have anterior mediastinal leiomyosarcoma and was managed with chemotherapy.