High-grade poorly differentiated sarcomas of unknown primary origin constitute a rare entity and are characterised by wide histopathological diversity and atypical presentations. We present such an unusual case attending with severe procidentia in a 68-year-old postmenopausal female. On review of the literature, there are no similar cases reported. Herein, we present this case as in view of its rare clinical appearance combined with the advanced and histologically uncertain nature of the tumour, which raised significant challenges regarding diagnosis and surgical management in considerations of oncological hygiene and risk of tumour spillage. This was further potentiated by delay in diagnosis and treatment due to the COVID-19 pandemic.