[Odontogenic cutaneous fistula: a diagnostic challenge]. / Fístula cutánea odontogénica: un reto diagnóstico.

Odontogenic cutaneous fistula (OCF) is the result of an abnormal canalization originating from chronic periapical infection. It represents a diagnostic challenge, as it is frequently misdiagnosed as dermatological lesion. There is a broad differential diagnosis, including pyogenic granuloma, cutaneous tuberculosis or congenital malformations, among others. We report the case of a 46-year-old man diagnosed with OCF who presented a rapid improvement after extraction of the affected dental pieces and fistulectomy. We consider knowledge of this pathology to be important in order to avoid unnecessary delays in diagnosis and proper treatment. Key words. Cutaneous fistula. DIAGNOSIS: Orthopantomography.

Frontal fibrosing alopecia: a pathology on the rise / Alopecia frontal fibrosante: una enfermedad en auge.

Frontal fibrosing alopecia (FFA) is a scarring alopecia whose incidence is increasing significantly in our country. It is characterized by loss of frontotemporal hairline that mostly affects postmenopausal women, with a negative impact on quality of life. It is associated with early menopause in 14% of cases and hypothyroidism in 15%. With regard to treatment, 5α-reductase inhibitors are the drugs that have shown improvement of the disease in a larger number of cases. We report a new case of FFA in a woman of 77 years successfully treated with finasteride at doses of 2.5mg daily.