{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,5]],"date-time":"2026-05-05T01:03:00Z","timestamp":1777942980599,"version":"3.51.4"},"reference-count":0,"publisher":"S. Karger AG","license":[{"start":{"date-parts":[[2010,4,1]],"date-time":"2010-04-01T00:00:00Z","timestamp":1270080000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"},{"start":{"date-parts":[[2010,4,1]],"date-time":"2010-04-01T00:00:00Z","timestamp":1270080000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Ophthalmologica"],"abstract":"<jats:p>Lacrimal sac diverticulum is a rare condition characterized by a cystic structure communicating with the sac. This abnormality may be directly demonstrated by dacryocystography only in a few cases; in the remaining cases, preoperative diagnosis may be arduous. We report 3 cases of lacrimal sac diverticulum. In all patients, symptoms were represented by a palpable mass in the lacrimal sac region, associated with permanent (case 1) or episodic (cases 2 and 3) epiphora. In the first case, CT-dacryocystography revealed an apparently solid mass causing inferior lacrimal obstruction, and ultrasonography disclosed a cystic space, not communicating with the sac. At surgery, a sac diverticulum was identified and excised. In the second patient, CT showed a homogeneous rounded mass, whereas a cystic character was revealed by T&lt;sub&gt;1&lt;\/sub&gt;-weighted MRI. Dacryocystography showed a lateral impression on the lateral wall of the sac. Ultrasonography revealed a cystic space communicating with the lacrimal sac. In the third case, ultrasonography demonstrated a diverticulum. CT is often unable to discriminate tumors from lacrimal cysts, both showing a parenchymal density. MRI can differentiate lacrimal cystic spaces from solid tumors by T&lt;sub&gt;1&lt;\/sub&gt; intensity and by demonstration of their walls, but it is nonspecific for diverticula. Only dacryocystography and B-scan ultrasonography can reveal the narrow communication between the sac and the diverticulum. Observation is the recommended management for asymptomatic cases.<\/jats:p>","DOI":"10.1159\/000310621","type":"journal-article","created":{"date-parts":[[2010,4,6]],"date-time":"2010-04-06T22:56:00Z","timestamp":1270594560000},"page":"228-232","source":"Crossref","is-referenced-by-count":14,"title":["Imaging Techniques in the Diagnosis of Lacrimal Sac Diverticulum"],"prefix":"10.1159","author":[{"given":"Ennio","family":"Polito","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Antonio","family":"Leccisotti","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Felice","family":"Menicacci","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Edoardo","family":"Motolese","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Giuseppe","family":"Addabbo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nicola","family":"Paterra","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"127","published-online":{"date-parts":[[2010,4,1]]},"container-title":["Ophthalmologica"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/karger.com\/article-pdf\/doi\/10.1159\/000310621","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,5,2]],"date-time":"2026-05-02T07:12:28Z","timestamp":1777705948000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000310621"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2010,4,1]]},"references-count":0,"URL":"https:\/\/doi.org\/10.1159\/000310621","archive":["Portico"],"relation":{},"ISSN":["0030-3755","1423-0267"],"issn-type":[{"value":"0030-3755","type":"print"},{"value":"1423-0267","type":"electronic"}],"subject":[],"published":{"date-parts":[[2010,4,1]]}}}