Hereditary benign intraepithelial dyskeratosis (HBID) is a rare inherited disease characterized by elevated plaques on the ocular and oral mucous membranes. Hereditary benign intraepithelial dyskeratosis is a rare autosomal dominant disease of the conjunctiva and the oral mucosa caused by a duplication of. Context.—Hereditary benign intraepithelial dyskeratosis (HBID) is a rare autosomal dominant disorder characterized by elevated epibulbar and oral plaques.

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However, the absence of any genes present intraepitelial the overlapping duplicated regions of 4q35 in both the proband we report and in the Native American families effectively excludes altered gene dosage as a shared cause of HBID, assuming that gene annotation is complete in this region. The bulbar conjunctiva is involved, especially in the nasal and temporal perilimbal region.

Hereditary benign intraepithelial dyskeratosis is a benign disease process with no reported cases of malignant transformation in the literature. Clinical Synopsis Toggle Dropdown.

The oral involvement was also more severe and extended to the larynx. Create a free personal account to access your subscriptions, sign up for alerts, and more. Hyperplastic squamous epithelium with multilayered parakeratotic mantle of pyknotic nuclei within eosinophilic ghosts of epithelial cells. Expert curators review the literature and organize it to facilitate your work. Previously reported duplications in the region of 4q35 were identified using the Database of Genomic Variants dgvbeta.

However, the etiology of these cellular changes has not been explicated. The patient’s brother had eye changes consistent intraepithelkal HBID, but had no oral lesions.

Isolation and chromosomal localization of a cornea-specific human keratin 12 gene and detection of four mutations in Meesmann corneal epithelial dystrophy. The oral lesions, which are typically asymptomatic and may go unrecognized, usually appear as thick, soft, white papules and plaques of various sizes, involving any part of the oral cavity.


Whole exome sequencing No open reading frames or identified genes were found in the Kb duplicated region of 4q. There is no sex predominance and as far as is known the disease is inherited as a simple Mendelian dominant. However, the signs and symptoms of these two cases were more severe than the classic disease findings previously described [9].

Eye Conjunctiva Hereditary intraepthelial intraepithelial dyskeratosis Author: Segregation of HBID duplication. Few reports have suggested that plaques spontaneously shed, however there has never been photographic documentation of this phenomenon.

He also had asymptomatic reddened gelatinous plaques and heredtary vessels on the conjunctiva of both eyes. Epibulbar leukoplakic conjunctival lesion.

Hereditary benign intraepithelial dyskeratosis (Concept Id: C)

As corneal opacificaiton recurred only several months after surgery, no further corneal procedures were performed for management of the corneal opacification in each eye Figure 1.

The nutritional status of this patient population was closely analyzed in order to rule out vitamin A deficiency as a cause for mucus membrane lesions. Hereditary Benign Intraepithelial Dyskeratosis: Purchase access Subscribe to JN Learning for one year. Acanthotic and dyskeratotic epithelium of conjunctiva and oral mucosa Overlying multilayered parakeratotic mantle with pyknotic nuclei and epithelial ghosts, middle and superficial layers dyskeratossis large intraepitheliak cells and dyskeratotic cells but no atypia Subepithelial lymphoid intraeputhelial Arch Pathol Lab Med ; The disease described here is considered to be a previously unreported entity affecting mucous membranes of the eye and mouth.


Inyraepithelial location of previously reported duplications and incidence of each in control populations Database of Genomic Variants are depicted underneath the schematic. Genetic testing is useful for confirmation of HBID but not necessary for diagnosis.

Cytologic observations were correlated with molecular genetic analyses.


Ocular and oral plaques are distinctively characterized by acanthosis, dyskeratosis, and parakeratosis within the stratified squamous epithelium. Create a free personal account to download hreditary article PDFs, sign up for alerts, customize your interests, and more.

Although originally thought to be congenital, HBID is not present at birth. The condition is predominantly seen in Native Americans belonging to the Haliwa-Saponi tribe located in northeastern North Carolina. A few patients had a corneal membrane or vascularized corneal opacity. Hereditary Benign Intraepithelial Dyskeratosis.

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A duplication in chromosome 4q35 is associated with hereditary benign intraepithelial dyskeratosis. Tina BuiB. Patients commonly complain of symptoms of irritation, such as erythema, itching, excessive lacrimation, and photophobia. Some of these patients have ancestory tracing to the Haliwa-Saponi tribe, while others do not [5] [6] [7]. J Oral Pathol Med. Hereditary benign intraepithelial dyskeratosis HBID.

Copy number variation analysis in the proband revealed seven regions of CNV across the genome, none of which involved chromosome 17 but 3 of which involved chromosome 4: