Bullous Systemic Lupus Erythematosus (BSLE) Workup
- Author: Ivan D Camacho, MD; Chief Editor: Dirk M Elston, MD more...
Approach Considerations
Bullous systemic lupus erythematosus occurs in the setting of systemic lupus erythematosus; thus, ANA test results generally are positive. Anti-dsDNA, anti-Sm, anti-Ro/SS-A, anti-La/SS-B, and anticardiolipin antibodies may also be detected.
Other laboratory abnormalities related to systemic lupus erythematosus can include low levels of complement (ie, C3, C4, CH50), anemia, leukopenia, thrombocytopenia, proteinuria or cellular casts upon urinalysis, and an elevated erythrocyte sedimentation rate. (See also Systemic Lupus Erythematosus and Lupus Nephritis.)
Laboratory findings in persons with toxic epidermal necrolysis–like lupus erythematosus vary depending on the underlying type of lupus erythematosus present.
Although the lupus erythematosus patients with erythema multiforme–like skin lesions who were originally described by Rowell and colleagues had immunologic features that included a speckled pattern of ANAs, anti-Ro/SS-A and/or La/SS-B antibodies, and a positive rheumatoid factor, these findings are not consistently observed in lupus erythematosus patients with this clinical presentation. Anticardiolipin antibodies and lupus anticoagulant have also been reported in individuals with Rowell syndrome.
Procedures
Diagnosis of bullous systemic lupus erythematosus requires skin biopsy specimens for routine light microscopy (preferably from the edge of a fresh blister, including adjacent, clinically unblistered skin) and DIF microscopy (from perilesional skin).
Histologic Findings
Light microscopy
Histologically, bullous systemic lupus erythematosus is characterized by dermoepidermal separation beneath an intact epidermis. A predominantly neutrophilic infiltrate is observed in an edematous upper dermis, either concentrated in the dermal papillae (similar to dermatitis herpetiformis) or distributed in a continuous band beneath the BMZ (similar to linear IgA bullous dermatosis).
Nuclear dust is often apparent, and a variable number of eosinophils and mononuclear cells are present within the dermal infiltrate. Basal keratinocyte vacuolization and other histologic features of cutaneous lupus erythematosus are typically absent.
Immunofluorescence microscopy
DIF microscopy of perilesional skin reveals deposition of IgG (with and without IgM and IgA) and complement in a linear or granular bandlike pattern at the BMZ.
In type 1 bullous systemic lupus erythematosus, DIF of salt-split perilesional skin and/or IIF microscopy following incubation of the patient's serum with salt-split normal human skin reveals immunoglobulin deposits localized to the dermal floor of the split.[23] Immunoblot and immunoprecipitation studies using the patient's serum can confirm that these antibodies recognize the 290- and 145-kd proteins of type VII collagen. An enzyme-linked immunosorbent assay (ELISA) test for rapid detection of anti–type VII collagen NC1 domain antibodies has also been developed.
In addition, direct immunoelectron microscopy can be used to demonstrate that the immunoglobulin deposits are codistributed with anchoring fibrils/type VII collagen within and just below the lamina densa.
Cases with negative IIF and an undetermined sublocalization of anti-BMZ antibodies (or antibodies recognizing a dermal antigen other than collagen VII) are referred to as type 2 bullous systemic lupus erythematosus. Of note, circulating antibodies to type VII collagen are less likely to be present in patients with a granular pattern of fluorescence on DIF. Bullous systemic lupus erythematosus characterized by immunoglobulin binding the epidermal roof (type 3 bullous systemic lupus erythematosus) or the roof and the dermal floor of salt-split skin has also been observed. Antigens in such patients have included bullous pemphigoid antigen 1, laminin-5, and laminin-6.
Histologic findings in toxic epidermal necrolysis–like and erythema multiforme–like lupus erythematosus lesions
The histologic features of toxic epidermal necrolysis–like lupus erythematosus consist of full-thickness epidermal necrosis and a sparse lymphocytic infiltrate in the upper dermis, as are seen in drug-induced toxic epidermal necrolysis.
Rowell syndrome is characterized by a vacuolar interface dermatitis with lymphocyte exocytosis; prominent necrotic keratinocytes in all layers of the epidermis; a mild, superficial, perivascular lymphocytic infiltrate; and dermal edema, features suggestive of erythema multiforme but also compatible with early, hyperacute cutaneous lupus erythematosus. DIF findings are usually negative.
Fujimoto W, Hamada T, Yamada J, Matsuura H, Iwatsuki K. Bullous Systemic Lupus Erythematosus as an Initial Manifestation of SLE. J Dermatol. Dec 2005;32(12):1021-7. [Medline].
Daneshpazhooh M, Shahdi M, Aghaeepoor M, Hasiri G, Chams C. A comparative study of antibody titers of blister fluid and serum in patients with subepidermal immunobullous diseases. Int J Dermatol. May 2004;43(5):348-51. [Medline].
Roustan G, Salas C, Barbadillo C, Sánchez Yus E, Mulero J, Simón A. Lupus erythematosus with an erythema multiforme-like eruption. Eur J Dermatol. Aug 2000;10(6):459-62. [Medline].
Horne NS, Narayan AR, Young RM, Frieri M. Toxic epidermal necrolysis in systemic lupus erythematosus. Autoimmun Rev. Feb 2006;5(2):160-4. [Medline].
Mandelcorn R, Shear NH. Lupus-associated toxic epidermal necrolysis: a novel manifestation of lupus?. J Am Acad Dermatol. Apr 2003;48(4):525-9. [Medline].
Paradela S, Martinez-Gomez W, Fernandez-Jorge B, et al. Toxic epidermal necrolysis-like acute cutaneous lupus erythematosus. Lupus. 2007;16(9):741-5. [Medline].
[Guideline] Finnish Medical Society Duodecim. Systemic lupus erythematosus (SLE). EBM Guidelines. Evidence-Based Medicine. Feb 2007;[Full Text].
Yang S, Gao Y, Song Y, Liu J, Yang C, Liu J, et al. The study of the participation of basement membrane zone antibodies in the formation of the lupus band in systemic lupus erythematosus. Int J Dermatol. Jun 2004;43(6):420-7. [Medline].
Ishii N, Yoshida M, Hisamatsu Y, et al. Epidermolysis bullosa acquisita sera react with distinct epitopes on the NC1 and NC2 domains of type VII collagen: study using immunoblotting of domain-specific recombinant proteins and postembedding immunoelectron microscopy. Br J Dermatol. May 2004;150(5):843-51. [Medline].
Chen M, Doostan A, Bandyopadhyay P, et al. The cartilage matrix protein subdomain of type VII collagen is pathogenic for epidermolysis bullosa acquisita. Am J Pathol. Jun 2007;170(6):2009-18. [Medline]. [Full Text].
Woodley DT, Ram R, Doostan A, et al. Induction of epidermolysis bullosa acquisita in mice by passive transfer of autoantibodies from patients. J Invest Dermatol. Jun 2006;126(6):1323-30. [Medline].
Chen L, Peterson JD, Zheng WY, Lin SX, Chan LS. Autoimmunity to type VII collagen in SKH1 mice is independent of regulatory T cells. Clin Exp Immunol. Aug 2006;145(2):322-31. [Medline]. [Full Text].
Chan LS, Lapiere JC, Chen M, et al. Bullous systemic lupus erythematosus with autoantibodies recognizing multiple skin basement membrane components, bullous pemphigoid antigen 1, laminin-5, laminin-6, and type VII collagen. Arch Dermatol. May 1999;135(5):569-73. [Medline].
Chen M, Chan LS, Cai X, et al. Development of an ELISA for rapid detection of anti-type VII collagen autoantibodies in epidermolysis bullosa acquisita. J Invest Dermatol. Jan 1997;108(1):68-72. [Medline].
Fujii K, Fujimoto W, Ueda M, Makino E, Arata J. Detection of anti-type VII collagen antibody in Sjögren's syndrome/lupus erythematosus overlap syndrome with transient bullous systemic lupus erythematosus. Br J Dermatol. Aug 1998;139(2):302-6. [Medline].
Hertl M, Eming R, Veldman C. T cell control in autoimmune bullous skin disorders. J Clin Invest. May 2006;116(5):1159-66. [Medline]. [Full Text].
Ting W, Stone MS, Racila D, Scofield RH, Sontheimer RD. Toxic epidermal necrolysis-like acute cutaneous lupus erythematosus and the spectrum of the acute syndrome of apoptotic pan-epidermolysis (ASAP): a case report, concept review and proposal for new classification of lupus erythematosus vesiculobullous skin lesions. Lupus. 2004;13(12):941-50. [Medline].
Khandpur S, Das S, Singh MK. Rowell's syndrome revisited: report of two cases from India. Int J Dermatol. Jul 2005;44(7):545-9. [Medline].
Pandhi D, Singal A, Agarwal P. Rowell's syndrome and associated antiphospholipid syndrome. Clin Exp Dermatol. Jan 2004;29(1):22-4. [Medline].
Shteyngarts AR, Warner MR, Camisa C. Lupus erythematosus associated with erythema multiforme: does Rowell's syndrome exist?. J Am Acad Dermatol. May 1999;40(5 Pt 1):773-7. [Medline].
Zeitouni NC, Funaro D, Cloutier RA, Gagné E, Claveau J. Redefining Rowell's syndrome. Br J Dermatol. Feb 2000;142(2):343-6. [Medline].
Paradela S, Martínez-Gómez W, Fernández-Jorge B, et al. Toxic epidermal necrolysis-like acute cutaneous lupus erythematosus. Lupus. 2007;16(9):741-5. [Medline].
Gammon WR, Fine JD, Forbes M, Briggaman RA. Immunofluorescence on split skin for the detection and differentiation of basement membrane zone autoantibodies. J Am Acad Dermatol. Jul 1992;27(1):79-87. [Medline].
Malcangi G, Brandozzi G, Giangiacomi M, Zampetti M, Danieli MG. Bullous SLE: response to methotrexate and relationship with disease activity. Lupus. 2003;12(1):63-6. [Medline].
Alsanafi S, Kovarik C, Mermelstein AL, Werth VP. Rituximab in the treatment of bullous systemic lupus erythematosus. J Clin Rheumatol. Apr 2011;17(3):142-4. [Medline].
Hamminga EA, Vermeer MH. Bullous systemic lupus erythematosus responding to mycophenolate mofetil. Eur J Dermatol. Nov-Dec 2010;20(6):844-5. [Medline].

