Tehran University of Medical Sciences Archives of Anesthesiology and Critical Care 2423-5849 7 2 2021 05 31 106 110 Mohammad Zeraati Department of Critical Care, Ayatollah Mousavi Hospital, Zanjan University of Medical Sciences, Zanjan, Iran. Hojjat Torkmandi Department of Operating Room, Faculty of Nursing and Midwifery, Zanjan University of Medical Sciences, Zanjan, Iran. Zahra Ghahramani Department of Radiology, School of Medicine, Ayatollah Mousavi Hospital, Zanjan University of Medical Sciences, Zanjan, Iran. Mohammad Abdi Department of Emergency and Critical Care, Zanjan University of Medical Sciences, Zanjan, Iran. & Department of Medical Education, Tehran University of Medical Sciences, Tehran, Iran. 2021 01 12 2021 01 18 Cerebral venous sinus thrombosis is a rare and infrequent condition in pregnant women. Hemorrhagic infarction can occur in early stages of cerebral venous thrombosis. This article reports a rare case of cerebral transverse sinus thrombosis presenting in pregnant women with unidentified secondary hypoparathyroidism, highlighting the difficulties in identifying this rare case from common diagnosis like preeclampsia. According to the differential diagnoses for this case, it can be a good exercise to strengthen clinical reasoning in students and medical teachers to improve the quality of clinical education. https://aacc.tums.ac.ir/index.php/aacc/article/view/328