This case highlights the importance of plain radiography in identifying non-osseous findings. 

Meticulous analysis of PFA indicated an abnormality which is quite vague at a first glance.  

The patient underwent lesion surgical resection (which has confirmed that it was arising from left ovary) and histopathological analysis confirmed serous ovarian cystadenoma. 

Ovarian cystadenoma is a benign epithelial tumor, however, may mimic more sinister entity such as cystadenocarcinoma.