• Tylotrich hairs are large hair follicles scattered throughout the body
• Hairs are larger than normal hairs and contain one large hair surrounded by a complex of neurovascular tissue at the level of the sebaceous gland
• rapid adapting mechanoreceptors

• hairs and hair follicles
• sebaceous glands
• sweat glands
• specialized glands (i.e. anal sacs, tail gland, glands of the external ear canal, and circumanal glands)
• claws and nails
• horny layer of the skin

feline eosinophilic granuloma

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• Other presentations include firm swellings on the chin (fat chin syndrome), swollen lower lips (pouting cat syndrome), oral lesions in the mouth, firm nodules in the skin, and nodules on the ear pinnae

• Treatment is not always needed as lesions in cats less than 1 year of age usually spontaneously resolve.
  
  
• Methylprednisone acetate (20 mg/cat SC), every 2 weeks until the lesions resolve (4–6 weeks), is effective.
  
  
• Recurrent lesions suggest an underlying trigger such as FAD, food allergy, and/or atopy.
• tissue damage may be caused by eosinophil collagenase that degrades type I and II collagen and gelatinases that degrade type XVII collagen.

A.k.a. Mucopolysaccharides are long non-branched polysaccharides composed of repeating sugar pairs.

When a glycosaminoglycan is attached to a protein core via serene or asparagine residues it is called a proteoglycan.