Thyroid Peroxidase Antibodies in Patients with Telogen Effluvium

The document reported on two studies, with the first study revealing that thyroid peroxidase antibodies (TPO-Ab) were present in 24.1% of 97 patients with chronic telogen effluvium (TE) and TE + androgenetic alopecia (AGA), suggesting an autoimmune component in the pathogenesis of TE. This prevalence was notably higher in women at 29%. The control group, consisting of 36 individuals with alopecia areata (AA), showed a 38.9% prevalence of TPO-Ab. The second study was unrelated to hair loss and detailed a case of a 70-year-old man with a scalp lesion that was a collision tumor of pigmented basal cell carcinoma and melanoma, diagnosed through dermoscopic features.