Female pattern hair loss.

Area of Science:

• Dermatology
• Endocrinology
• Trichology

Background:

• Female pattern hair loss (FPHL), or female androgenetic alopecia, is a prevalent condition causing cosmetic distress in millions of women.
• Early diagnosis and intervention are crucial for achieving the best outcomes in managing FPHL.
• This review details the clinical presentation, differential diagnosis, and treatment options for FPHL.

Purpose of the Study:

• To provide a comprehensive overview of female pattern hair loss (FPHL).
• To discuss diagnostic criteria and differentiate FPHL from other hair loss conditions.
• To review current and potential treatment modalities for FPHL.

Main Methods:

• Review of clinical presentations including Ludwig's and Hamilton types.
• Discussion of potential endocrinological abnormalities like polycystic ovarian syndrome (PCOS).
• Comparison with differential diagnoses such as Chronic Telogen Effluvium (CTE), Permanent Alopecia after Chemotherapy (PAC), Alopecia Areata Incognito (AAI), and Frontal Fibrosing Alopecia (FFA).

Main Results:

• FPHL typically presents as diffuse thinning or specific patterns like the "Christmas tree pattern."
• While generally not associated with elevated androgens, FPHL can coexist with signs of hyperandrogenism, most commonly PCOS.
• Key conditions to differentiate FPHL from include CTE, PAC, AAI, and FFA, each with distinct diagnostic criteria.

Conclusions:

• The only FDA-approved treatment for FPHL is 2% topical Minoxidil, applied twice daily for at least 12 months.
• Off-label treatments under investigation include 5-alfa reductase inhibitors, antiandrogens, estrogens, prostaglandin analogs, lasers, light therapies, and hair transplantation.
• Effective management of FPHL requires accurate diagnosis and consideration of both approved and emerging therapeutic options.