Nasal abnormalities are rare in bovines. In humans, nasal deformities are mainly classified as proboscis lateralis or supernumerary nostrils. This report discusses the etiology of triple nostrils in a calf, based on computed tomography, magnetic resonance imaging, and endoscopy. A female Holstein calf presented with triple nostrils. The following abnormalities were observed: (1) formation of a small and flat blind-ended middle nostril between the right and left nostrils; (2) presence of a hair-bearing surface on the muzzle; (3) abnormal curvature of the nasal septum, resulting in a narrower right nasal cavity due to transformation of the nasal bones; and (4) formation of a bone-like structure within the nasal septum. These findings were similar to those of supernumerary nostrils in humans. To the best of our knowledge, this represents the first description of a calf with triple nostrils. The use of imaging modalities is necessary for investigating the etiology of triple nostrils.

中文翻译：

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小腿的三个鼻孔。

牛的鼻部异常很少见。在人类中，鼻畸形主要分为长鼻外侧肌或多生鼻孔。本报告基于计算机断层扫描、磁共振成像和内窥镜检查，讨论了小牛三鼻孔的病因。一头雌性荷斯坦小牛长出三个鼻孔。观察到以下异常：（1）在左右鼻孔之间形成小而扁平的盲端中鼻孔；(2) 口吻上有毛面；(3)鼻中隔弯曲异常，因鼻骨变形导致右鼻腔变窄；(4)在鼻中隔内形成骨样结构。这些发现与人类多余鼻孔的发现相似。据我们所知，这是对具有三鼻孔的小牛的首次描述。使用成像方式对于研究三鼻孔的病因是必要的。