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==Developmental disorders==
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*'''Palatoschisis''' ([[Oral Cavity - Cavity & Gingiva#Cleft Palate|cleft palate]]) - [[Lungs - inflammatory#Aspiration pneumonia|aspiration pneumonia]] is a common sequel
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*Nasal deviation
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*'''Choanal atresia''' - imperforate buccopharyngeal membrane
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*'''Maxillary cysts''' in foals - can cause obstruction of ipsilateral nasal passage, destruction of turbinates and deviation of nasal septum
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*'''Cystic nasal chonchae'''
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*'''Nasal cysts'''
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*'''Deviation of nasal septum'''
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*'''Cleft upper [[Lips - Anatomy & Physiology|lip]]'''
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*'''Hypoplastic turbinates'''
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===Ciliary dyskinesia===
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*Immotile cilia syndrome
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*Defect of microtubules of all ciliates cells, including spermatozoa
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*Important factor in recurrent canine [[Nasal cavity - inflammatory|rhino]][[Paranasal Sinuses Inflammatory - Pathology|sinusitis]], [[Bronchi and Bronchioles Inflammatory - Pathology|bronchitis]] and [[Lungs - inflammatory|pneumonia]]
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===Brachycephalic airway syndrome===
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*Stenotic nares, excessive lenght of [[Soft Palate - Anatomy & Physiology|soft palate]]
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*All brachycephalic dog and cat breeds, e.g. English bulldog, Pekinese, Boxer etc.
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==In Horses==
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===Atheroma===
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*= '''Epidermal inclusion cyst'''
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*Cyst in nasal diverticulum
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*Uncommin congenital disorder
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*Sometimes identified as 'sebaceous cyst' as contents resemble sebum
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*Contents composed or squamous cells, odourless, oily
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*Soft, mobile, not painful
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===Alar fold stenosis===
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*Mucocutaneous structure from alar cartilage to rostral aspect of ventral nasal concha
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*Uncommon
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*Noise on inspiration or expiration
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*Rarely impairs respiratory capacity
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===Wry nose===
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*''Campylorrhinus lateralis''
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*Congenital deviation and shortening of premaxillae, nasal bones and nasal septum