Dermoid Sinus- Nasal
A dermoid sinus is an embryological defect with resultant failure of separation of the skin during normal developmental closure of neural tube. This can result in a connection from the central nervous system to the skin. Nassal dermoid sinuses have the potential to extend into the cranial vault contributing to abscess formation or recurrent meningitis.
A dermoid sinus may appear as small indentations or openings in the skin, often associated with an abnormal hair pattern. In some instances, fluid will exude from the abnormal skin area and may be associated with local dermatitis. The associated adhesion between the spinal cord elements and the overlying skin may result in a tethering of these tissues together.
A dermoid sinus may appear as small indentations or openings in the skin, often associated with an abnormal hair pattern. In some instances, fluid will exude from the abnormal skin area and may be associated with local dermatitis. The associated adhesion between the spinal cord elements and the overlying skin may result in a tethering of these tissues together.
Age of Onset: Clinical signs can present at any age, however, the defect will be present since birth.
Sex Predisposition: Any sex of animal can be affected
Clinical Course:
Variable - the presence and severity of signs is related to the degree of inflammation and infection associated with the defect.
Variable - the presence and severity of signs is related to the degree of inflammation and infection associated with the defect.
Clinical Signs:
Behavioral/Mental Awareness
Seizures
Posture and Appearance
Indentations within the skin over the defect ("nasal pit")
Soft fluctuant swelling on the dorsal aspect of the nose
Painful Reactions
Pain on palpation of the affected area
Other
Nasal swelling and discharge
Behavioral/Mental Awareness
Seizures
Posture and Appearance
Indentations within the skin over the defect ("nasal pit")
Soft fluctuant swelling on the dorsal aspect of the nose
Painful Reactions
Pain on palpation of the affected area
Other
Nasal swelling and discharge
Nasal- occur along midline (may extend into and involve structures of the cranial vault)
Unknown
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