{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,27]],"date-time":"2026-06-27T23:46:33Z","timestamp":1782603993697,"version":"3.54.5"},"reference-count":9,"publisher":"BMJ","issue":"3","content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["Pract Neurol"],"accepted":{"date-parts":[[2017,1,23]]},"published-print":{"date-parts":[[2017,6]]},"abstract":"<jats:p>We present a rare case of intracranial papillary endothelial hyperplasia, or \u2018Masson\u2019s tumour,\u2019 following gamma knife radiosurgery for epilepsy. A 59-year-old woman presented with a 4-month history of escalating headaches and progressive neurological deficit. MR scan of brain showed enlargement of an enhancing right temporal lobe lesion, midline shift and obstructive hydrocephalus. She had previously undergone non-curative gamma knife radiosurgery at the age of 44 years for medically refractory complex partial seizures. Postprocedure imaging had shown signal change and enhancement within the right temporal lobe consistent with radiation necrosis, which remained stable over the next decade. Now, 15 years following radiosurgery, we suspected an intrinsic high-grade neoplasm, but surgical excision instead found a benign pseudoneoplasm. Papillary endothelial hyperplasia should be considered in the differential diagnosis for mass lesions following gamma knife radiosurgery, particularly as resection can be curative. Remarkably, she has become seizure free.<\/jats:p>","DOI":"10.1136\/practneurol-2016-001573","type":"journal-article","created":{"date-parts":[[2017,2,23]],"date-time":"2017-02-23T21:07:06Z","timestamp":1487884026000},"page":"214-217","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":9,"title":["Intracranial papillary endothelial hyperplasia (Masson\u2019s tumour) following gamma knife radiosurgery for temporal lobe epilepsy"],"prefix":"10.1136","volume":"17","author":[{"given":"Andrew W","family":"Barritt","sequence":"first","affiliation":[{"name":"Department of Neurology, Hurstwood Park Neurosciences Centre, Haywards Heath, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ashirwad","family":"Merve","sequence":"additional","affiliation":[{"name":"Neuropathology, National Hospital for Neurology and Neurosurgery, London, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Prasanna","family":"Epaliyanage","sequence":"additional","affiliation":[{"name":"Department of Neurology, Hurstwood Park Neurosciences Centre, Haywards Heath, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Julia","family":"Aram","sequence":"additional","affiliation":[{"name":"Department of Neurology, Hurstwood Park Neurosciences Centre, Haywards Heath, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2017,2,23]]},"reference":[{"key":"2025090411570580000_17.3.214.1","doi-asserted-by":"publisher","DOI":"10.1016\/S1474-4422(08)70108-X"},{"key":"2025090411570580000_17.3.214.2","doi-asserted-by":"publisher","DOI":"10.1111\/j.0013-9580.2004.07903.x"},{"key":"2025090411570580000_17.3.214.3","doi-asserted-by":"crossref","first-page":"442","DOI":"10.1111\/ane.12562","article-title":"Stereotactic radiosurgery for the treatment of mesial temporal lobe epilepsy","volume":"134","author":"Feng","year":"2016","journal-title":"Acta Neurol Scand"},{"key":"2025090411570580000_17.3.214.4","doi-asserted-by":"crossref","first-page":"811","DOI":"10.1016\/j.clineuro.2007.07.005","article-title":"Masson's tumour in the right parietal lobe after stereotactic radiosurgery for cerebellar AVM: case report and review","volume":"109","author":"Crocker","year":"2007","journal-title":"Clin Neurol Neurosurg"},{"key":"2025090411570580000_17.3.214.5","doi-asserted-by":"crossref","first-page":"2264","DOI":"10.1016\/j.clineuro.2013.07.021","article-title":"Intravascular papillary endothelial hyperplasia of the skull base and intracranial compartment","volume":"115","author":"Miller","year":"2013","journal-title":"Clin Neurol Neurosurg"},{"key":"2025090411570580000_17.3.214.6","doi-asserted-by":"crossref","first-page":"E1043","DOI":"10.1227\/NEU.0b013e31822e81f9","article-title":"Extravascular papillary endothelial hyperplasia mimicking neoplasm after radiosurgery: case report","volume":"70","author":"Karamchandani","year":"2012","journal-title":"Neurosurgery"},{"key":"2025090411570580000_17.3.214.7","doi-asserted-by":"publisher","DOI":"10.1097\/PAS.0000000000000539"},{"key":"2025090411570580000_17.3.214.8","doi-asserted-by":"publisher","DOI":"10.2176\/nmc.44.302"},{"key":"2025090411570580000_17.3.214.9","doi-asserted-by":"crossref","first-page":"266","DOI":"10.1016\/j.surneu.2004.11.035","article-title":"Intravascular papillary endothelial hyperplasia at the superior orbital fissure: report of a case successfully treated with gamma knife radiosurgery","volume":"64","author":"Ohshima","year":"2005","journal-title":"Surg Neurol"}],"container-title":["Practical Neurology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.1136\/practneurol-2016-001573","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,9,4]],"date-time":"2025-09-04T18:57:11Z","timestamp":1757012231000},"score":1,"resource":{"primary":{"URL":"https:\/\/pn.bmj.com\/lookup\/doi\/10.1136\/practneurol-2016-001573"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,2,23]]},"references-count":9,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2017,5,26]]},"published-print":{"date-parts":[[2017,6]]}},"alternative-id":["10.1136\/practneurol-2016-001573"],"URL":"https:\/\/doi.org\/10.1136\/practneurol-2016-001573","relation":{},"ISSN":["1474-7758","1474-7766"],"issn-type":[{"value":"1474-7758","type":"print"},{"value":"1474-7766","type":"electronic"}],"subject":[],"published":{"date-parts":[[2017,2,23]]}}}