Cryptogenic Stroke in an Adult Sudanese Female with Interatrial Septal Aneurysm: A Case ReportMahmoud Hussien Salih Daoud1, Ejlal Ahmed.E. Abushama2, Abdallah H. Mahmmoud3, Mohammed Mahmmoud Fadelallah Eljack4, Khabab Abbasher Hussien Mohamed Ahmed5, Mazin S. Hassan Haroun6, Elfatih A. Hasabo7, Duaa Baderaldeen Ibraheem Elsheikh8, Sulieman Abdelkareim G. Mohammed9, Ahmed Eltayeb O. Eltayeb10, Yusif Abduelmagid M. Naimallah11, Alameen Ahmed Alameen Ahmed12, Mohamed Yusif Mohamed Yusif13, Asmaa Esam Abbas Mokhtar14, Sara Nasreldeen Ibrahim Awadalbari15, Rowida Babikir Osman Eltayeb16