Cassotis Nicholas J, Schiffman Peter
Michigan State University, Department of Small Animal Clinical Sciences, D-208 Veterinary Medical Center, East Lansing, MI 48824-1314, USA.
Vet Ophthalmol. 2006 May-Jun;9(3):187-90. doi: 10.1111/j.1463-5224.2006.00454.x.
A 12-year-old Paso Fino mare was evaluated for a chronic nasal and ocular discharge. A calcification was identified eroding through the nasal mucosa of the middle meatus. Differential considerations for this mass included dacryolith, nasal calculus, or calcified tooth root abscess. Anatomical location and case history and progression supported a dacryolith. Following removal, the calculus was submitted for mineralogic analysis. The calculus was primarily carbonate hydroxylapatite (Ca10(PO4)3(CO3)3(OH)2) with a minor NaCl halite constituent. Dacryoliths, or nasolacrimal calculi, are an uncommon occurrence in animals, and sparsely reported in humans. The etiopathogenesis of dacryolith formation is unknown. The objective of this article was to report the first case report of an equine nasolacrimal system dacryolith and its mineralogic composition.
一匹12岁的 Paso Fino 母马因慢性鼻泪分泌物而接受评估。在中鼻道的鼻黏膜处发现了一处侵蚀性钙化。该肿物的鉴别诊断包括泪石、鼻结石或钙化牙根脓肿。肿物的解剖位置、病史及病情发展支持泪石的诊断。肿物切除后，结石被送去做矿物学分析。结石主要成分是碳酸羟磷灰石（Ca10(PO4)3(CO3)3(OH)2），还有少量的氯化钠石盐成分。泪石，即鼻泪管结石，在动物中并不常见，在人类中的报道也很少。泪石形成的病因尚不清楚。本文的目的是报告首例马鼻泪系统泪石病例及其矿物学组成。
