Paragangliomas are extra-adrenal tumours of the autonomic nervous system. which rarely present as primary retroperitoneal mass mimicking pancreatic malignancy (incidence 2-8 per million populations). Urinary Bladder Paraganglioma are also extremely rare (0. 06% of all Bladder Tumour and 6% of Paragangliomas) with most being malignant and high grade tumours. https://www.trangtinamthuc.com/product-category/hoodies-fleece/