Abstract：
A 14-y-old intact female llama (Lama glama) was presented for evaluation of a right maxillary swelling of 3-mo duration. Clinically, the animal had mild nasal discharge, abnormal retropulsion of the right eye, and moderate gingival disease. An incisional biopsy of the maxillary mass revealed pleomorphic and mitotically active neoplastic spindle-to-stellate cells organized in haphazard lacunae embedded in abundant chondroid matrix. Given the poor prognosis, euthanasia was elected. Postmortem examination and sectioning of the head exposed a large solid, white, firm mass that vastly expanded the right infraorbital region, extending to the maxilla, effacing the right nasal conchae and ipsilateral zygomatic bone. Collectively, postmortem dissection, cytology, and histopathology of the primary mass supported a diagnosis of sinonasal chondrosarcoma. To our knowledge, this entity had not been reported previously in this species and should be considered a differential for facial deformities in New World camelids.
摘要：
提出了一个14岁的完整雌性美洲驼（Lamaglama），用于评估3个月的右上颌肿胀。临床上,动物有轻微的鼻涕,右眼反常的逆行,和中度牙龈疾病。上颌肿块的切开活检显示，多形性和有丝分裂活性的肿瘤纺锤体至星状细胞组织在嵌入丰富的软骨样基质中的任意腔隙中。鉴于预后不良，安乐死当选。尸检和头部切片暴露了一个大固体，白色,坚定的质量极大地扩大了正确的轨道下区域，延伸到上颌骨，清除右侧鼻甲和同侧颧骨。总的来说，尸检,细胞学,和原发性肿块的组织病理学支持诊断为鼻窦软骨肉瘤。据我们所知,该实体以前从未在该物种中报道过，应被视为新世界骆驼科动物面部畸形的差异。
