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The median tumor size was 4.4\u00a0cm (range, 3.1\u20136.5\u00a0cm). The mass was, respectively, round in four cases (57.1%), lobulated in two cases (28.6%) and oval in one case (14.3%). All tumors were well-circumscribed. Septa in the mass could be observed in three cases (42.9%), and nodular calcification was observed in two cases (28.6%), which peritumoral edema (n\u2009=\u20093, 42.9%) and hydrocephalus (n\u2009=\u20093, 42.9%) could be observed. Most of these lesions (n\u2009=\u20096) presented iso-hypointensity on T1-weighted images and iso-hyperintensity on T2-weighted images, except one lesion showing low intensity on T2WI. In addition, a fluid\u2013fluid level was observed in one case. After contrast agents\u2019 injection, all masses illustrated heterogeneously moderate to marked enhancement.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>A well-defined solid and cystic mass with calcification and moderate to marked delayed enhancement may be an objective account of intra-parenchymal or intra-ventricular schwannoma.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12880-022-00917-z","type":"journal-article","created":{"date-parts":[[2022,11,17]],"date-time":"2022-11-17T11:03:10Z","timestamp":1668682990000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["CT and MRI findings of intra-parenchymal and intra-ventricular schwannoma: a series of seven cases"],"prefix":"10.1186","volume":"22","author":[{"given":"Zhen-yi","family":"Zhang","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhi-qing","family":"Mo","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"You-ming","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hong","family":"Yang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bin","family":"Yao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hao","family":"Ding","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,11,17]]},"reference":[{"key":"917_CR1","doi-asserted-by":"publisher","first-page":"194","DOI":"10.1097\/00006123-199701000-00043","volume":"40","author":"PP Huang","year":"1997","unstructured":"Huang PP, Zagzag D, Benjamin V. 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This retrospective study was approved by the Medical Research Ethics Committee of Xiangya Hospital, Central South University, according to the declarations of Helsinki (NO:2019030398).","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not Applicable.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"All authors in this study declared that we have no financial and personal relationships with other people or organizations that could inappropriately influence our work.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"197"}}