Unmasking the presence of circulating pemphigus antibodies in a patient with coexistent pemphigus, SLE, multiple autoantibodies, and gastric carcinoma

Concurrence of Systemic Lupus Erythematosus and Pemphigus: Coincidence or Correlation?

BACKGROUND

Pemphigus and systemic lupus erythematosus (SLE) have previously been reported to coexist in the same patient. However, the relationship between the 2 diseases has not been elucidated.

OBJECTIVE

This review was conducted to examine the relationship between pemphigus and SLE when they occur together in the same patient.

METHODS

We conducted a retrospective review of the literature to identify previously reported cases of pemphigus and SLE coexisting in the same patient. The temporal relationship, clinical course, response to therapy and effects of 1 disease on the other were examined.

RESULTS

Eight patients with a dual diagnosis of pemphigus and SLE have been previously reported. Most were female and non-Caucasian, with a mean age of 41 years. In the 8 patients reviewed here clinical outcomes, organ system involvement and demographic profiles are more typical of SLE. Seven of these 8 patients had pemphigus vulgaris, and 1 had pemphigus erythematosus. The limited follow-up did not permit studying issues of disease interaction. An additional 17 patients with pemphigus have been reported who have features suggestive of SLE. Organ system involvement in these patients was less typical of SLE.

CONCLUSION

It appears that a true dual diagnosis of pemphigus and SLE is less common than suggested by the literature. Comparing patients with only pemphigus or only SLE to those with both may provide insights into genetic predisposition and pathogenesis, and provide an opportunity to study the effects of drugs that influence their course.

Dual diagnosis of pemphigus vulgaris and connective tissue disease

This is a retrospective analysis of patients with pemphigus vulgaris and connective tissue disease (CTD) present as systemic lupus erythematosus, mixed CTD, or both. Pemphigus vulgaris was severe, difficult to treat, but eventually responded to therapy, resulting in a remission. In 6 patients, the CTD was stable and controlled with symptomatic therapy, and in 7 patients required systemic therapy. Life-threatening systemic involvement in systemic lupus erythematosus or mixed CTD-such as renal, cardiac, and neurologic-were absent in these patients on 8 years (range 3-18 years) of follow-up. There are two limitations to this study. First, it is a retrospective study. Second, no other disease control groups were used for comparison purposes.

Pemphigus foliaceus and oral lichen planus in a patient with systemic lupus erythematosus and thymoma

A 49-year-old woman with systemic lupus erythematosus, and a history of thymoma and chronic white plaques of the oral mucosa, developed a blistering eruption which was diagnosed as pemphigus foliaceus based on clinical, histological and direct immunofluorescence findings. However, the white plaques had both the clinical and histological features of lichen planus, as well as intercellular antibodies suggestive of pemphigus. Such conditions in combination have been documented previously, but this is believed to be the first report of the coexistence of all four in one individual. The common mechanism underlying these four conditions may well be an immunological disturbance.

High-titer interferon-alpha antibodies in a patient with pemphigus foliaceus

Among 13 patients with pemphigus or bullous pemphigoid, high titers of anti-interferon-alpha (IFN-alpha) antibodies were present in all serum samples of one patient suffering from pemphigus foliaceus. This patient was characterized by a relatively benign course of the disease. The IFN antibodies were of oligoclonal or polyclonal origin, predominantly of the IgG subtype, and displayed a broad spectrum of specificity including various natural and recombinant IFN-alpha subtypes as well as recombinant IFN-omega 1. In vitro, these antibodies neutralized both the antiviral and antiproliferative activities of the respective IFN types. Recognition of the patient's endogenous IFN-alpha demonstrated their autoantibody nature. The IFN antibodies were present at diagnosis and resistant to continued immunosuppressive treatment. Despite clinical remission, the IFN antibodies persisted, suggesting that they were not pathogenically related to the skin manifestations of the pemphigus. There were no sings of immune complex-mediated organ damage. IFN antibodies constitute a new class of autoantibodies that may occur in conjunction with pemphigus and likely interfere with the endogenous IFN system.