Effectiveness of Microneedling Using Long Needles for the Treatment of Non-inflammatoryAlopecia in Dogs

Non-inflammatory alopecia includes endocrine diseases and alopecia X. Microneedling (MN) promotes hair regrowth in cases with alopecia X.However, its effects on other non-inflammatory alopecia types remain unclear.This case report evaluated the effectiveness of MN in the treatment of alopecia in dogs with endocrine disorders.The study included one dog each with hypothyroidism (Case-1), hyperadrenocorticism (Case-2), and alopecia X (Case-3).Despite controlled hormone levels, dogs of Cases 1 and 2 showed no hair regrowth.Microneedling was performed on alopecic lesions, and hair regrowth was monitored at 1, 3, 6, and 12 months.In Case-1, almost complete hair regrowth was observed at 12 months.In Case-2, most lesions exhibited regrowth at 6 months, with no hair loss up to 12 months.Case-3 exhibited 51-75% regrowth at 12 months.These findings suggest that MN may serve as an adjunct treatment for dogs with controlled hormone levels but persistent alopecia.