eng Oriental Scientific Publishing Company Biomedical and Pharmacology Journal 0974-6242 2023-12-31 16 4 2539 2542 10.13005/bpj/2828 53522 article I Wayan Niryana 1 Steven Awyono 1 Made Satriya Ranuwibawa 1 Christopher Lauren 1 Neurosurgery Division, Department of Surgery, Faculty of Medicine, Universitas Udayana, Prof. Dr. I.G.N.G. Ngoerah General Hospital, Denpasar, Bali, Indonesia Microvascular decompression (MVD) is one of the well-established treatment options for trigeminal neuralgia that may include posterior fossa surgery. However, Several complications were noted as being part of posterior fossa surgery and hydrocephalus is very rare to occur, especially the slow-chronic onset type. The pathophysiology is still unclear, but surgeons and patients must be warned about this possible surgical adverse event. Here we report a case of slow-chronic hydrocephalus in a  66-years old male who has a history of  MVD procedure due to left trigeminal neuralgia. A shunt procedure was performed, in which after the surgery the patient’s complaints were resolved, and discharged without any morbidity. https://biomedpharmajournal.org/vol16no4/slow-chronic-progressive-hydrocephalus-as-complication-of-microvascular-decompression-for-trigeminal-neuralgia-a-case-report/ Hydrocephalus Microvascular decompression Neurofunctional Neurosurgery Trigeminal neuralgia