[[Image:Atheroma.jpg|right|thumb|125px|<small><center>'''Atheroma'''. Courtesy of A. Jefferies</center></small>]]
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*= '''Epidermal inclusion cyst'''
*= '''Epidermal inclusion cyst'''
*Cyst in nasal diverticulum
*Cyst in nasal diverticulum
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*Sometimes identified as 'sebaceous cyst' as contents resemble sebum
*Sometimes identified as 'sebaceous cyst' as contents resemble sebum
*Contents composed of squamous cells, odourless, oily
*Contents composed of squamous cells, odourless, oily
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*Soft, mobile, not painful[[Category:Horse]][[Category:Nasal_Cavity_-_Developmental_Pathology]][[Category:Respiratory_System_-_Developmental_Pathology]]