Although the book focuses on a number of rare gynaecological cancers, those listed in this chapter are super rare. The tumours discussed here are PECOMAS, FATWO, UTROSCT and well-differentiated neuroendocrine tumours (NETS) previously known as carcinoids. This also includes classical carcinoid tumours and struma ovarii. It is generally not possible to make the diagnosis preoperatively and so we are totally dependent upon the histological findings. As a result of this, many, if not most, will be unexpected findings when operated on by a general gynaecologist who may not carry out cancer-type operation. It is therefore mandatory that these cases are discussed at the multidisciplinary clinic or tumour board, and frequently these cases need to be referred to national centres of expertise for the interpretation of the pathology. Much of the information provided in this chapter comes from case reports or small series and until recently, the case reports numbered less than 500. Some of these included helpful reviews of the literature, but there are a handful of larger series that do give some more insightful information about the presentation, diagnosis, management and prognosis for these tumours. The author has attempted to summarise these reports and hopes that the reader will find this of value and be pointed in the right direction for further reading.