This is a case of an adult patient with hypertensive intraventricular haemorrhages complicated by hydrocephalus that failed to respond to endoscopic third ventriculostomy (ETV). High-resolution 3D Fast Imaging Employing Steady State Acquisition (FIESTA) magnetic resonance imaging (MRI) revealed underlying multiloculated hydrocephalus. This case report highlights the appropriate sequence and its attributes that offer adequate preoperative information detailing the ventricular system.

KMT2B-linked dystonia (DYT-KMT2B) is a childhood-onset dystonia syndrome typically beginning in the lower limbs and progressing caudocranially to affect the upper limbs with eventual prominent craniocervical involvement. Despite its recent recognition, it now appears to be one of the more common monogenic causes of dystonia syndromes. Here, we present an atypical case of DYT-KMT2B with oromandibular dystonia as the presenting feature, which remained restricted to this region three decades after symptom onset. This appears to be the first reported case of DYT-KMT2B from Southeast Asia and provides further supporting evidence for the pathogenic impact of the KMT2B c.6210_6213delTGAG variant.