Canis ISSN: 2398-2942

Skin: idiopathic cyclic flank alopecia

Synonym(s): Seasonal flank alopecia, Canine recurrent flank alopecia, Seasonal growth hormone deficiency

Contributor(s): Rosanna Marsella, Susan E Shaw

Introduction

  • Cause: may be due to seasonal changes in hormone levels.
  • Signs: diffuse symmetrical alopecia.
  • Develops in spring or autumn and resolves during the course of the year.
  • Diagnosis: seasonal history, clinical signs, histopathology.
  • Treatment: chemotherapy - methyltestosterone.
  • Prognosis: if regrowth occurs hair may be of different color and texture.
  • Areas of alopecia may become larger with time.

Pathogenesis

Pathophysiology

  • Poorly understood.
  • Proposed that: photoperiod influences pineal gland secretion → melatonin secretion → inverse correlation with serum prolactin concentrations → alopecia.
  • Timings of hair loss and regrowth are not precise.

Timecourse

  • Hair loss over period of weeks to months.

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.
  • Cerundolo R (1999) Symmetrical alopecia in the dog. In Practice 21 (7), 350-359 VetMedResource.
  • Curtis C F, Evans H & Lloyd D H (1996) Investigation of the reproductive and growth hormone status of dogs affected by idiopathic recurrent flank alopecia. JSAP 37 (9), 417-422 PubMed.
  • Kuhl K A (1996) Newly reported skin diseases. Vet Med 91 (11), 1007-1020 VetMedResource.
  • Waldman L (1995) Seasonal flank alopecia in Affenpinschers. JSAP 36 (6), 271-273 PubMed.
  • Curtis C (1993) Flank alopecia in dogs. Vet Rec 133 (17), 432 PubMed.
  • Miller M A & Dunstan R W (1993) Seasonal flank alopecia in Boxers and Airedale terriers - 24 cases (1985-1992). JAVMA 203 (11), 1567-1572 PubMed.
  • Scott D W (1990) Seasonal flank alopecia in ovariohysterectomised dogs. Cornell Veterinarian 80 (2), 187-95 PubMed.

Other sources of information

  • Muller G Het al(1995)Muller and Kirk's Small Animal Dermatology.5th edn. Philadelphia: W B Saunders. pp 727-729.


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