Arch Dermatol. 1997 Sep;133(9):1089-93.
Loose anagen hair.
Tosti A, et al
OBJECTIVE: To review clinical and pathologic features and the long-term follow-up of patients with loose anagen hair (LAH). DESIGN: Clinical evaluation and long-term follow-up. … snip…. RESULTS: In 4 children and 1 adult the condition remained stable; in 2 children and 1 adult, a considerable improvement in hair density was noticed. The pathologic study of hair from 5 patients did not reveal morphological abnormalities of the hair follicles except for a high incidence of fragmentations of the inner root sheath. CONCLUSIONS: Analysis of our patients with LAH reveals that the condition does not develop exclusively during childhood but can occasionally manifest itself later in life. The development of LAH may be sporadic, occur in association with developmental or acquired conditions, or, less commonly, be a familial disorder. While adult-onset LAH may not be exceptional, it can be easily misdiagnosed as telogen hair loss. The pathologic findings of LAH do not demonstrate any specific features and are of little value in the diagnosis of this condition.