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Skin: seborrhea
Introduction
- Seborrhea is a term that indicates scaling and crusting – this can be dry (seborrhea sicca) or oily (seborrhea oleosa).
- Seborrhea can be primary (rare condition) or secondary (most commonly).
- Cause: due to primary disease of keratinization or secondary to a disturbance in the process of epidermal proliferation, differentiation and desquamation.
- Signs: scaling and crusting, alopecia.
- Diagnosis: history and clinical signs, cytology, scrapings, brushings, acetate tape impressions, hair examinations, fungal culture, biopsy.
- Treatment: topical therapy; treat secondary infections or nutritional disturbances.
- Prognosis: depends on underlying disease.
Presenting signs
- Scaling and crusting.
- Alopecia and pruritus may develop as secondary change.
Pathogenesis
Etiology
- It can be due to a primary disease of keratinization or secondary to a disturbance in the process of epidermal proliferation, differentiation and desquamation.
- Primary diseases are evident at very young age while secondary conditions develop later in life
.
Predisposing factors
General
- Any inflammatory process can lead to seborrhea as a secondary change.
Specific
- Bacterial
. - Fungal
. - Parasites
. - Nutritional imbalances.
- Malabsorption/maldigestion.
- Chemical contactants.
- Immunological.
- Neoplastic.
Pathophysiology
- It depends on the underlying disease.
Timecourse
- Primary diseases are evident at very young age while secondary conditions develop later in life.
Diagnosis
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Treatment
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Outcomes
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Further Reading
Publications
Refereed papers
- Recent references from PubMed and VetMedResource.
- Osborne C (2006) Sebaceous adenitis in a 7-year-old Arabian gelding. Can Vet J 47 (6), 583-586 PubMed.
- Fadok V A (1995) An overview of equine dermatoses characterized by scaling and crusting. Vet Clin North Am Equine Pract 11 (1), 43-51 PubMed.
- Geor R J, Clark E G, Haines D M et al (1990) Systemic lupus erythematosus in a filly. JAVMA 197 (11), 1489-1492 PubMed.
Other sources of information
- Scott D W & Miller W H (2011) Equine Dermatology. 2nd edn. Saunders, USA.
- Knottenbelt D C (2009) Pascoe’s Principles and Practice of Equine Dermatology. 2nd edn. Saunders, USA.