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- Presentation
Pediatric Alopecia Case: Distinguishing Scarring Alopecia, Alopecia Areata, and the Role of Biopsy and JAK Inhibitors
Description
A pediatric alopecia case highlighted a 10-year-old girl with eyebrow, eyelash, and patchy scalp hair loss that initially suggested alopecia areata, but the presence of smooth areas, papules, and poor response to standard treatments raised concern for scarring alopecia. Biopsy and repeat biopsy, guided by trichoscopy, were crucial because different scalp sites showed different pathology: one area suggested early scarring/lichen planopilaris-like disease, while another showed classic alopecia areata features. The clinician emphasized that biopsy processing with both horizontal and vertical sectioning (Hovert technique) can reveal missed findings, and that multiple specimens may be needed when the exam shows mixed patterns. Treatment included hydroxychloroquine, steroids, antibiotics, topical ruxolitinib, vitamin D replacement, and later systemic JAK inhibition with tofacitinib, oral minoxidil, and then ritlecitinib when disease worsened after a lapse in follow-up. The patient improved substantially, including regrowth in previously scarred areas, reinforcing that JAK inhibitors may have a role in both alopecia areata and some scarring alopecias. Key takeaways were to biopsy unclear or scarring cases, use trichoscopy to choose biopsy sites, request proper sectioning, repeat biopsy if the picture evolves, and consider JAK inhibitors for severe disease.
View moreConclusions
- The case shows that pediatric alopecia can involve more than one process at the same time, including alopecia areata overlapping with scarring alopecia.
- When the diagnosis is unclear or the clinical pattern is mixed, scalp biopsy is essential rather than assuming a single cause.
- Trichoscopy is valuable for identifying the most informative biopsy site and for recognizing signs of both scarring and non-scarring alopecia.
- Biopsy processing method matters greatly, and combined horizontal and vertical sectioning can reveal pathology that a single sectioning approach might miss.
- Repeat biopsy is warranted if the first workup is inconclusive or if the hair-loss pattern evolves or fails to respond as expected.
- JAK inhibitors may have a role not only in alopecia areata but also in some scarring alopecias, making them a promising treatment option.
- Treatment response may require combination therapy, including systemic agents, topical therapy, and supportive measures such as minoxidil.
- Hair loss that does not respond to standard therapy should prompt reconsideration of the diagnosis and renewed evaluation for overlap disease or scarring.
- The presentation suggests that early recognition and aggressive treatment can lead to meaningful regrowth even in severe, refractory pediatric alopecia.
- Inflammatory scalp disorders in children may benefit from attention to triggers such as hair care products, and gentle or hypoallergenic hair care may be part of management.
- Journal of the American Academy of Dermatology slide describing the Tyler technique and HoVert technique for scalp biopsy processing.