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The diagnosis of perimesencephalic subarachnoid haemorrhage was established on neuroimaging. The amount of haemorrhage is related to symptoms. A dense clot in the quadrigeminal cistern might have been the cause of trochlear nerve palsy.<\/jats:p>","DOI":"10.1136\/bcr.2012.006175","type":"journal-article","created":{"date-parts":[[2012,7,9]],"date-time":"2012-07-09T11:39:40Z","timestamp":1341833980000},"page":"bcr2012006175","source":"Crossref","is-referenced-by-count":5,"title":["Isolated trochlear nerve palsy with perimesencephalic subarachnoid haemorrhage: Figure 1"],"prefix":"10.1136","volume":"2012","author":[{"given":"Koji","family":"Adachi","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kouhei","family":"Hironaka","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hisaharu","family":"Suzuki","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hideaki","family":"Oharazawa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[2012,7,9]]},"reference":[{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jaapos.2004.01.003"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.2","doi-asserted-by":"publisher","DOI":"10.1016\/S0002-9394(01)00932-1"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.3","first-page":"571","article-title":"[A case of solitary and unilateral trochlear nerve palsy due to a blunt head impact].","volume":"43","author":"Ishizaki","year":"2003","journal-title":"Rinsho Shinkeigaku"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.4","doi-asserted-by":"publisher","DOI":"10.1016\/j.injury.2010.03.007"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.5","doi-asserted-by":"crossref","first-page":"1126","DOI":"10.1212\/WNL.53.5.1126","article-title":"Isolated superior oblique palsies with brainstem lesions.","volume":"53","author":"Th\u00f6mke","year":"1999","journal-title":"Neurology"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.6","doi-asserted-by":"publisher","DOI":"10.1002\/(SICI)1097-4598(200002)23:2<267::AID-MUS19>3.0.CO;2-B"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.7","doi-asserted-by":"publisher","DOI":"10.1001\/archneurol.2010.131"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.8","first-page":"138","article-title":"Midbrain hemorrhage presenting with trochlear nerve palsy.","volume":"63","author":"Chen","year":"2000","journal-title":"Zhonghua Yi Xue Za Zhi (Taipei)"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.9","doi-asserted-by":"crossref","first-page":"204","DOI":"10.1097\/00041327-199809000-00012","article-title":"Isolated fourth nerve palsy from midbrain hemorrhage: case report.","volume":"18","author":"Galetta","year":"1998","journal-title":"J Neuroophthalmol"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.10","first-page":"965","article-title":"[A case of brainstem vascular malformation with isolated trochlear nerve palsy as the initial symptom].","volume":"43","author":"Hatori","year":"1991","journal-title":"No To Shinkei"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.11","doi-asserted-by":"publisher","DOI":"10.1016\/j.clineuro.2009.08.025"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.12","first-page":"71","article-title":"[Midbrain hemorrhage presenting with trochlear nerve palsy\u2013a case report].","volume":"36","author":"Mon","year":"1996","journal-title":"Rinsho Shinkeigaku"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.13","doi-asserted-by":"publisher","DOI":"10.4103\/0301-4738.58476"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.14","doi-asserted-by":"publisher","DOI":"10.1016\/0039-6257(86)90061-5"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.15","doi-asserted-by":"publisher","DOI":"10.1001\/archopht.1986.01050240045037"},{"key":"2025082800090879000_2012.jul06_1.bcr2012006175.16","first-page":"11","article-title":"Analysis of trochlear nerve palsies. 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