Case in point. Dental sinus tract.
Department of Internal Medicine, University of Texas Health Science Center at Houston, USA.
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D000328:Adult; D017577:Cutaneous Fistula / Q000209:etiology*; D003751:Dental Fistula / Q000209:etiology; D005260:Female; D006801:Humans; D010482:Periapical Abscess / Q000150:complications / Q000175:diagnosis*