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Case Report
2007:73:4;260-261
doi: 10.4103/0378-6323.33639
PMID: 17675737

Familial Behcet's disease

Neeraj Srivastava1 , Satish Chand1 , Manish Bansal2 , Kanchan Srivastava1 , Sanjay Singh1
1 Department of Dermatology and Venereology, Institute of Medical Sciences, Banaras Hindu University, Varanasi, India
2 Department of Dermatology and Venereology, All India Institute of Medical Sciences, New Delhi, India

Correspondence Address:
Sanjay Singh
C-9, New Medical Enclave, Banaras Hindu University, Varanasi - 221 005
India
How to cite this article:
Srivastava N, Chand S, Bansal M, Srivastava K, Singh S. Familial Behcet's disease. Indian J Dermatol Venereol Leprol 2007;73:260-261
Copyright: (C)2007 Indian Journal of Dermatology, Venereology, and Leprology

Abstract

There are very few reports of Behηet's disease from India. Familial aggregation of Behηet's disease has been reported with restricted geographical distribution. We report here familial Behcet's disease from India in two brothers aged 30 and 32 years. Both patients had recurrent oral and genital ulcers for approximately five years. They also had arthralgias on and off along with fever. Pathergy test was positive in both cases. Their younger brother and a sister had recurrent oral aphthous ulcers.
Keywords: Aphthous ulcers, Behηet′s disease, Pathergy test, Vasculitis

Introduction

Behηet′s disease is an inflammatory disease of unknown origin presenting with recurrent oral and genital ulcers and ocular involvement. Its prevalence is highest in countries of the eastern Mediterranean, middle East and the eastern Asian rim. Familial aggregation of the disease has been reported mainly from Turkey [1] and Japan. [2] We describe two brothers aged 30 and 32 years with recurrent oral and genital aphthous-like ulcers due to Behηet′s disease.

Case Report

Two brothers aged 30 and 32 years, from Sasaram district, Bihar,th presented with recurrent oral and genital aphthous-like ulcers since the last five years. They also had arthralgias on and off for one year and 4½ years respectively, along with mild grade fever. Their younger brother and a sister also had recurrent oral aphthous ulcers. There was no history of extramarital sexual contact in either case.

Blood investigations revealed mild leucocytosis and raised erythrocyte sedimentation rate (32 and 40 mm in the first hour, respectivelyth ) . Tzanck smear did not show features of herpes infection. Pathergy test was done by oblique insertion of a 20-guage needle intradermally under sterile conditions. Papules formed at the injection sites in both cases at 48 hours. The papules were punch biopsied and histopathological examination showed leukocytoclastic vasculitis. Ophthalmological examination was normal.

Diagnosis of Behηet′s disease was made according to the diagnostic criteria developed by the International Study Group for Behηet′s Disease. [3] Patients were prescribed topical triamcinolone in orabase for oral lesions, clobetasone butyrate cream for genital lesions and dapsone 100 mg thrice daily orally. The ulcers healed in about four weeks but new ulcers appeared after a month despite continued treatment. After the relapse, dapsone was stopped and oral prednisolone (40 mg/day) was added. In about two weeks, the ulcers healed completely and prednisolone was tapered to 40 mg on alternate days. No new ulcers have developed in two months′ follow-up.

Discussion

Behηet′s disease is a systemic autoimmune vasculopathy manifesting usually by recurrent oro-genital aphthous-like ulcerations and eye findings. [1] There are no specific manifestations or special diagnostic tests for the disease. Aphthous oral ulcers are usually the first and most characteristic clinical feature. Genital ulcers resemble oral ulcers and may be single or multiple. Pathergy, an excessive skin response to trauma, is a unique manifestation of Behηet′s disease reflecting neutrophil hyper-reactivity. Besides skin, vasculitic lesions can be seen in eyes, central nervous system, gastrointestinal system, bones, kidneys and large blood vessels.

The diagnosis of Behηet′s disease depends on the recognition of a number of typical clinical findings as well as exclusion of common mucosal ulcerative disorders. The International Study Group for Behηet′s disease has developed diagnostic criteria which require the presence of oral ulceration plus any two of the following: genital ulceration, typical defined eye lesion, typical defined skin lesion or a positive pathergy test. [3] These criteria are most commonly used to diagnose the disease. It has been reported that the pathergy test is rarely positive in Indian patients with Behηet′s disease. [4] However, both of the present cases tested positive for pathergy.

Behηet′s disease occurs primarily in young adults with the mean age of onset being 25-30 years. The highest prevalence of Behηet′s disease is seen in Japan, Korea, China, Iran and Turkey. [5] The prevalence for a population of 100,000 is 13.4 in Japan, 14 in China, 16.7 in Iran, 20 in Saudi Arabia, 80 to 370 in Turkey and much less in other countries. There are only a few reports of Behηet′s disease from India. [4] This may be explained by two possibilities, either the disease is really uncommon in India or it is simply under-diagnosed and under-reported. Most cases of Behηet′s disease are sporadic and the parents of patients are usually unaffected [1] although a familial aggregation of Behηet′s disease has been reported.

A peculiar geographical distribution and a familial aggregation have been regarded as evidence supporting a genetic influence on the pathogenesis of Behηet′s disease. [1] However, the rarity of Behηet′s disease in Japanese immigrated to Hawaii shows the greater importance of environmental factors [5] rather than genetic factors. A higher incidence of familial aggregation was noted in juvenile patients with Behηet′s disease. [6] Majority of reports of familial cases are from Turkey [1] and Japan. [2] In a paper on Behηet′s disease from India, [4] a few instances of familial occurrence were mentioned. However, detailed clinical features of these cases, except in two cases-a mother and her daughter, were not described. From this paper, it appeared that oral ulcers in family members were also considered to be cases of familial occurrence.

In studies from abroad [7] but not from India, [4] Behηet′s disease has been known to be strongly associated with human leukocyte antigen (HLA) B51, one of the split antigens of HLA-B5. Recent studies have suggested that there is no association between factor V Leiden mutation and deep vein thrombosis in Behηet′s disease, [8] while ICAM-1 genes [9] and familial Mediterranean fever gene (MEFV) [10] mutation may contribute to the vascular inflammatory changes associated with Behηet′s disease. Behcet′s disease is considered to be rare in India. [4] The two brothers reported here presented with recurrent oral and genital aphthous-like ulcers. They also had periodic arthralgias. Pathergy test was positive in both cases. Also, their one younger brother and a sister have recurrent oral aphthous ulcers. This paper suggests that Behηet′s disease in India including its familial occurrence may not be as rare as is generally believed. Heightened awareness of this condition among the clinicians is likely to generate more data on Behηet′s disease in India.

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