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J Dermatol Case Rep. 2014 Mar 31;8(1):9-12. doi: 10.3315/jdcr.2014.1162. eCollection 2014 Mar 31.

Mucous membranepemphigoid in two half-sisters. The potential roles of autoantibodies to β4 integrin subunits and HLA-DQβ1*0301.

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1
The Center for Blistering Diseases, Boston, MA, USA;
2
Naval Medical Center, Portsmouth, Virginia, USA.

Abstract

BACKGROUND:

Mucous membrane pemphigoid (MMP) is a subepithelial autoimmune mucocutaneous disease. It most frequently affects the oral mucosa, followed by ocular and nasal mucosa, nasopharyngeal, anogenital, skin, laryngeal and esophageal mucosa.

MAIN OBSERVATION:

Two half-sisters developed mucous membrane pemphigoid at approximately the same age. The older sister presented with primarily mucosal disease, while the younger had a more cutaneous disease. The histopathology demonstrated a subepithelial blister and direct immunofluorescence showed deposition of IgG and C3 at the basement membrane zone of perilesional tissues in both sisters. Antibodies to human β4 integrin were present in the sera of both patients and correlated with disease activity. Both sisters carried the same HLADQβ1* 0301 allele.

CONCLUSIONS:

This is the first case of mucous membrane pemphigoid occurring in two half-sisters. Perhaps, it is the low incidence of mucous membrane pemphigoid that may account for the lack of reports on familial cases of the disease.

KEYWORDS:

IVIG; basement membrane zone; dapsone; dysphagia; family; pemphigoid; tacrolimus

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