title: Amalgam contact hypersensitivity lesion: an unusual presentation-report of a rare case.
abstract: Amalgam or its components may cause Type IV hypersensitivity reactions on the oral mucosa. These amalgam contact hypersensitivity lesions (ACHL) present as white striae and plaques, erythematous, erosive, atrophic, or ulcerative lesions. Postinflammatory pigmentation in such lesions and pigmentation due to amalgam incorporation in the soft tissue have been reported in the literature. However, ACHL presenting primarily as a black pigmented lesion is extremely rare if not reported. The clinician should be aware of one such presentation of ACHL; we report a unique case of ACHL in a 30-year-old female with such a pigmented lesion in close contact with amalgam restorations. The lesion regressed considerably in a year after replacement of the restoration with posterior composites.
authors.affiliation: Department of Oral Medicine, Diagnosis and Radiology, Dayananda Sagar College of Dental Sciences and Hospital, Bengaluru, Karnataka, India.
authors.forename: Bk
authors.initials: B
authors.lastname: Ramnarayan
authors.affiliation: Department of Oral Pathology, Bangalore Institute of Dental Sciences, V.S. Dental College and Hospital, VV Puram, Bengaluru, Karnataka, India.
authors.forename: Pm
authors.initials: P
authors.lastname: Maligi
authors.affiliation: Department of Oral Pathology, V.S. Dental College and Hospital, VV Puram, Bengaluru, Karnataka, India.
authors.forename: T
authors.initials: T
authors.lastname: Smitha
authors.affiliation: Department of Oral Medicine, Diagnosis and Radiology, Dayananda Sagar College of Dental Sciences and Hospital, Bengaluru, Karnataka, India.
authors.forename: Us
authors.initials: U
authors.lastname: Patil
keywords: Amalgam; Amalgam contact hypersensitivity lesion; Lichenoid reaction; Oral mucosa