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Ординатура / Хирургия / Библиотека им академика М.И. Перельмана / Книга_2758_Библиотеки_им_академика_М_И_Перельмана

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Histopathology ofCutaneous
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Adverse Drug Reactions
NicolasOrtonne
1 Introduction
This chapter focuses on the histopathological manifestations of cutaneous adverse drug reac­tions (CADRs) driven by immune-mediated lym­phocyte reactivity. These disorders are triggered by T lymphocytes reactive to the culprit drug and subsequently recruited into the skin: CADRs thus represent a model of delayed hypersensitivity (Zanni etal. 1998). Although the pathophysiol­ogy of CADR is complex, studies focusing on genetic predisposition to drug allergy, T-cell functioning and keratinocyte apoptosis have informed our understanding of the biology which underpins these reactions. In particular, the development of epidermal necrolysis is inu­enced by a genetic risk linked to the presence of a particular HLA variant (Hung et al. 2005; Chessman et al. 2008), while the disorder is mediated through the action of cytotoxic proteins produced by effector T-cells and factors which can activate apoptosis and necroptosis pathways in target keratinocytes (Nassif et al. 2004; de Araujo etal. 2011; Chung etal. 2008).
2 Inammatory Patterns
inCADR
As described by Ackerman, the two main histo­pathological presentations encountered in CADRs are the spongiotic and interface dermati­tis patterns (Ackerman 1997). The psoriasiform pattern is usually not seen in classical CADRs.
2.1 Spongiotic Reaction Pattern
From a histological point of view, the spongiotic reaction pattern in CADRs is similar to that seen in other eczematous dermatoses, such as atopic eczema, contact dermatitis and viral maculopap­ular rashes. In the acute phase there is conuent spongiosis which forms vesicles containing exo­cytosed lymphocytes and Langerhans cells (Fig. 1). The spongiotic pattern is frequent in maculopapular drug rashes and drug reaction with eosinophilia and systemic symptoms (DRESS). Chronic and sometimes widespread eczematous reactions have been described in older patients taking commonly prescribed medi­cines, such as anti-hypertensive drugs (especially calcium channel blockers, angiotensin- converting enzyme inhibitors) (Joly etal. 2007).
N. Ortonne (*) Department of Pathology, Henri Mondor Hospital and Paris Est Creteil University, Creteil, France e-mail: nicolas.ortonne@aphp.fr
© Springer Nature Switzerland AG 2022 H. Y. Lee, D. Creamer (eds.), Drug Eruptions, Updates in Clinical Dermatology,
https://doi.org/10.1007/978-3-031-09388-3_3
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Fig. 1 Eczematous reaction pattern. (a) Acute phase eczema showing foci of spongiosis, characterized by the enlargement of inter-keratinocyte spaces and vesicles con­taining mononuclear inammatory cells. There is a der­mal perivascular inltrate composed of lymphocytes.
2.2 Interface Dermatitis Pattern
The characteristic feature of the interface derma­titis pattern is epidermal attack by lymphocytes. Other cytotoxic cell populations, such as den­dritic plasmacytoid cells, can also be involved in this epidermal assault. The classical inamma­tory dermatosis associated with an interface der­matitis histological pattern is lichen planus (Wenzel etal. 2006).
The interface dermatitis pattern is variably associated with the following features:
• Inltration of the deep layers of the epidermis
by lymphocytes and other mononuclear cells
(macrophages/dendritic plasmacytoid cells).
• Keratinocyte death producing apoptotic bod-
ies (Civatte or colloid bodies) with the release
of melanin pigment from their cytoplasm into
the epidermis and dermis.
• Vacuolization of the dermoepidermal junction
due to cell death and mononuclear cell
exocytosis.
Two main types of interface dermatitis pattern can be identied morphologically: the vacuolar form and the classical form (Ackerman 1997). The vacuolar form is characterized by vacuoliza­tion of the basal layer of the epidermis with occa­sional apoptotic keratinocytes and a scanty lymphocytic inltrate (Fig. 2a). This pattern is
Haematoxylin and eosin ×200. (b) Vesicle at high magni­cation containing numerous Langerhans’ cells which are recognized by their clear and irregularly shaped nuclei and moderately abundant eosinophilic cytoplasm. Haematoxylin and eosin ×400
encountered in acute cutaneous lupus erythema­tosus and acute graft-versus-host disease. The classical form, which occurs most commonly in lichen planus, is typied by an abundant lympho­cytic inltrate with more marked keratinocyte apoptosis (Fig.2b).
A third variant of the interface dermatitis pat­tern can be considered, one which occurs in the most severe form of CADR: Stevens–Johnson syndrome/toxic epidermal necrolysis (SJS/ TEN) (Fig.2c). In this entity, keratinocyte apop­tosis is predominant, in the form of conuent clusters of dead cells. Keratinocyte apoptosis explains the skin detachment in SJS/TEN, referred to as epidermal necrolysis (EN), and is caused by loss of cellular junctions between neighbouring apoptotic cells. The lymphocyte inltrate can be quite moderate or even minimal in SJS/TEN reecting the concept that direct contact with cytotoxic effector lymphocytes is not necessary to kill keratinocytes. However, soluble pro-apoptotic mediators, such as Fas ligand, granulysin, interferon and TNF-alpha may be involved, along with phenotypic modi­cations of keratinocytes, leading to death ligand expression (Arnold et al. 1999). Certain pro­inammatory cytokines promote keratinocyte expression of pro-apoptotic ligands, such as Fas ligand (Abe etal. 2003), and induces the death of neighbouring cells. The role of the necropto­sis process, recently identied in SJS/TEN, may
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Fig. 2 Interface dermatitis reaction pattern. (a) Vacuolar interface dermatitis with lymphocyte exocytosis, vacuol­ization of the epidermal basal layer, occasional apoptotic bodies and scattered lymphocytes in the supercial der­mis. Haematoxylin and eosin ×200. (b) Classical lichen­oid interface dermatitis with a dense lymphocytic inltrate occupying the supercial dermis and extending to the der-
also partly explain pathomechanisms of the dis­order (Saito etal. 2014). Necroptosis is charac­terized by a breakdown of the integrity of cell membranes with release of alarmins, which in
mal–epidermal junction with numerous apoptotic bodies. Haematoxylin and eosin ×100. (c) Aggressive ID, illus­trating “acute syndrome of apoptotic pan-epidermolysis” (ASAP), with conuent apoptotic keratinocytes and scat­tered lymphocytes in the supercial dermis and basal lay­ers of the epidermis. Haematoxylin and eosin ×200
may characterize all the above entities, in which common cellular and/or molecular effectors occur downstream of drug, auto-immune, allo­immune and infectious triggers, respectively.
turn induce the death of other cells and recruit­ment of effector T-cells.
The term “acute syndrome of apoptotic pan-
epidermolysis” (ASAP) was rst introduced in
3 Non-specic Histological
Aspects ofCutaneous ADRs
2004 by Ting etal. to describe an aggressive form of lupus erythematosus showing an EN-like pattern on histology (Ting etal. 2004). We, and others, have shown that other skin diseases can present histologically with an EN pattern, includ­ing DRESS (Ortonne etal. 2015), erythema mul­tiforme (Amode etal. 2018), lupus erythematosus (Ting etal. 2004), acute graft-versus-host disease and contact reactions with Nigella sativa oil (Gaudin etal. 2018). A similar cytotoxic pathway
Pathologists with a reductionist vision of CADR histopathology are inclined to limit their diagno­ses by the presence of eosinophils and/or apop­totic keratinocytes. These two elements are neither constant nor specic for a drug-induced dermatosis. In many forms of CADR eosinophils are absent, as are apoptotic keratinocytes. Conversely, numerous non-drug rashes are dis­tinguished by one or other of these features.
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Thus, histology is not usually considered as a major diagnostic criterion for CADR. As an example, a “non-suggestive” histology as a nega­tive criterion for DRESS is the sole histological feature mentioned in the DRESS diagnostic sys­tem published by Kardaun etal. (2013). However, dermatopathology is an extremely important tool in discriminating severe CADRs from non-drug dermatoses. In a patient with extensive skin detachment, histology will distinguish TEN from staphylococcal scalded skin syndrome or from an autoimmune bullous disorder.
The following sections outline the major his­topathological features found in classical CADR entities. It remains uncertain whether individual manifestations represent distinct clinical­pathological entities or different aspects of a dis­ease spectrum. In a retrospective study of 216 cases of CADRs overlap cases were rare, sug­gesting the validity of separate, discrete drug­induced disorders (Bouvresse etal. 2012).
4 Drug-Induced Exanthem
The drug-induced exanthem, also known as a maculo-papular rash, is the commonest form of CADR and tends to show non-specic histologi­cal features (Hunziker etal. 1997). The dermato­pathology may reveal only a perivascular lymphocytic inltrate in the upper part of the der­mis (Fig.3a), and for this reason a skin biopsy is often not performed. Nonetheless, histopatho­logical assessment may help to differentiate a drug-induced exanthem from other conditions presenting with an exanthem and a modest der­mal lymphocytic inltrate, such as cutaneous angioimmunoblastic T-cell lymphoma (AITL), secondary syphilis, or autoimmune disorders (lupus erythematosus, dermatomyositis). Of note is the similarity, at the histological level, between a viral exanthem and a drug-induced exanthem. A drug aetiology is more likely with a spongiotic reaction pattern and/or a multi-focal interface
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Fig. 3 Histological aspects of the drug-induced exan­them. (a) Drug-induced exanthem characterised by a slight perivascular inltrate in the supercial dermis. Haematoxylin and eosin ×25. (b) Drug-induced exanthem with spongiotic reaction pattern: conuent spongiosis and lymphocyte exocytosis. Haematoxylin and eosin ×200. (c)
Drug-induced exanthem with an interface dermatitis, lym­phocytes inltrating the basal layers of the vacuolized epi­dermis and a few apoptotic keratinocytes. There is an abundant perivascular lymphocytic inltrate in the super­cial dermis. Haematoxylin and eosin ×200
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dermatitis pattern (Fig.3b, c) (Deschamps et al.
2020; Gerson et al. 2008). From a histological
point of view, this supports the existence of a spectrum linking drug-induced exanthem with DRESS, the latter being regarded by some authors as a more severe expression of the former (Pinto Gouveia etal. 2016; Ortonne 2016).
5 Drug Reaction
withEosinophilia andSystemic Symptoms (DRESS)
The histological picture of DRESS is highly variable and reects the wide range of skin manifestations macroscopically. However, a
lymphocytic inltrate is constant and, as with drug-induced exanthems, may be the sole fea­ture (Fig.4a). A spongiotic (Fig.4b) or inter­face dermatitis reaction pattern (Fig. 4c) can occur, while pustular forms and keratinocyte apoptosis may also be present (Fig.4d). Dermal oedema and red blood cell extravasation are often observed, reecting an increased micro­vascular permeability. Vasculitis is not a fea­ture. The presence of several different inammatory reaction patterns in a single biopsy may be a clue to the diagnosis of DRESS (Ortonne etal. 2015).
The inammatory cell inltrate in DRESS varies. Lymphocytes are usually the predominant cell type, but eosinophils may be prominent, although this is not a predictive feature (Fig.5a).
Fig. 4 Various histopathological features of drug reaction with eosinophils and systemic symptoms (DRESS). (a) DRESS syndrome with a dense inltrate composed mainly of lymphocytes in the supercial and mid dermis. Epidermal changes are minimal. Haematoxylin and eosin ×100. (b) DRESS syndrome with a spongiotic reaction pattern, showing intra-epidermal vesicles containing lym­phocytes and Langerhans’ cells (arrow). Haematoxylin and eosin ×200. (c) DRESS with interface dermatitis
showing a sub- epidermal band-like inltrate mainly com­posed of lymphocytes covering the dermal–epidermal junction. Scattered apoptotic keratinocytes are present in the epidermis. Haematoxylin and eosin ×200. (d) DRESS syndrome overlapping with toxic epidermal necrolysis. A cluster of apoptotic keratinocytes has resulted in complete detachment of the epidermis. A dense inltrate is present in the supercial dermis containing a few neutrophils and nuclear debris. Haematoxylin and eosin ×100
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Fig. 5 Eosinophils and visceral injury in DRESS. (a) Dense dermal inammatory inltrate, mostly made of lymphocytes with numerous widespread eosinophils, with hyperplastic overlying epidermis. Eosinophils are associ­ated with foci of collagen necrosis to yield “ame gures” (inset). Haematoxylin and eosin ×100. (b) Severe hepati­tis in a patient with DRESS showing dense inammatory inltrate of the portal spaces, expanding into the liver lob­ules with areas of necrosis. The inltrate is made of lym-
Neutrophils can be seen, and, rarely, plasma cells. The lymphocytic inltrate in DRESS may be intense and show epidermotropism. Highly activated T lymphocytes with an atypical appear­ance can also be seen making a differential diag-
phocytes, some of which are slightly enlarged or show elongated nuclei, admixed with scattered eosinophils. Haematoxylin and eosin ×200. (c) Necrotizing colitis in a patient with DRESS.Areas of necrosis and ulceration of the mucosa. Haematoxylin and eosin ×200. (d) Necrotizing colitis in a patient with DRESS.A dense lym­phocytic inltrate in the sub-mucosa with numerous eosinophils and ame gures (arrows). Haematoxylin and eosin ×200
the herpes viruses, including EBV (Seishima et al. 2006). T-cells which are specic to EBV peptides have been identied in many target tis­sues of DRESS, raising questions about disease triggers (Picard etal. 2010).
nosis from T-cell lymphoma difcult. Discriminating DRESS from cutaneous lympho­mas (Sézary syndrome, angioimmunoblastic T-cell lymphoma, aggressive CD8+ epidermo­tropic T-cell lymphoma) relies on phenotyping
6 Acute Generalized
Exanthematous Pustulosis (AGEP)
and molecular studies.
The hallmark of DRESS is the systemic involvement which includes acute hepatitis (Fig. 5b), myocarditis, nephritis, pneumonitis and colitis (Fig.5c, d). Another signicant char­acteristic is its association with reactivation of
In contrast to DRESS, acute generalized exan­thematous pustulosis (AGEP) usually produces a simple and characteristic histopathology (Halevy et al. 2010). Sub-corneal, multilocular pustules are typical, which are difcult to distinguish from
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Fig. 6 Acute generalized exanthematous pustulosis (AGEP). (a) Early phase showing sub-corneal multilocu­lar neutrophil pustule. Haematoxylin and eosin ×100. (b) Late phase showing loss of pustule and elimination of the
pustular psoriasis (Fig. 6a, c). Subtle ndings which point away from pustular psoriasis and towards AGEP include the presence of eosino-
nuclear debris within a parakeratotic scale. Haematoxylin and eosin ×100. (c) Active AGEP with sub-corneal pus­tule and a dense dermal inltrate. Haematoxylin and eosin ×200
7 Stevens–Johnson Syndrome/
Toxic Epidermal Necrolysis (SJS/TEN)
phils, necrotic keratinocytes, a mixed mid-dermal interstitial and perivascular inltrate, and the absence of tortuous or dilated blood vessels (Kardaun etal. 2010). Histopathological diagno­sis is aided by the biopsy of a fresh lesion; old pustules are rapidly eliminated from the stratum corneum (Fig.6b). The small size of AGEP pus­tules may enforce the need for multiple levels to be cut to reveal the characteristic pathology.
SJS/TEN has a characteristic histological appear­ance. The disease is characterized by a massive and conuent apoptosis of epidermal keratino­cytes, sometimes including those of the hair or sweat appendages. Keratinocyte death is so exten­sive that the epidermis detaches from the dermis (epidermal necrolysis) (Fig.7). A dermal lympho­cytic inltrate is always present but of varying
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Fig. 7 Stevens–Johnson syndrome/toxic epidermal necrolysis (SJS/TEN). (a) Early lesion showing scattered apoptotic keratinocytes and a minimal dermal lympho­cytic inltrate. Haematoxylin and eosin ×200. (b) Established SJS/TEN showing conuent epidermal apop­tosis and epidermal detachment. Haematoxylin and eosin
density: often, it is scanty and with a paucity which contrasts with the severity of epidermal pathology. The density of the inltrate has no prognostic sig­nicance (Valeyrie-Allanore etal. 2013).
×200. (c) Late lesion of SJS/TEN with regenerated epider­mis underlying the detached, necrotic epidermis. In the detached epidermis, there is evidence of secondary isch­emic necrosis with keratinocyte pallor and vacuolization. Haematoxylin and eosin ×200
that GBFDE can present with massive keratino­cytes apoptosis, as is commonly seen in SJS/ TEN, or with spongiotic and/or interface derma­titis inammatory patterns. Cho et al. showed that GBFDE and TEN are slightly different, with more eosinophils and melanophages in GBFDE
8 Fixed Drug Eruption (FDE)
than TEN, and more granulysin + effector cells in
the epidermis in TEN than GBFDE (Cho etal. A histopathological study of FDE demonstrated necrotic keratinocytes, spongiosis, vacuolar degeneration, eosinophils in 73% of cases, and dermal melanophages in 55% (Weinborn et al.
2016). In a further study of generalized bullous
FDE (GBFDE) an interface dermatitis was always present, eosinophils were seen in 87.5% and dermal melanophages in all cases (Cho etal.
2014) (Fig. 8). Our studies have demonstrated
2014). Misukawa etal. and Shiohara etal. dem-
onstrated that memory CD8+ T cells were rapidly
activated after drug intake and were thereafter
maintained in the basal layer of lesional epider-
mis (Mizukawa and Shiohara 2010; Shiohara and
Mizukawa 2007; Mizukawa et al. 2002, 2008).
CD8+ T cells within the basal layer can be dem-
onstrated in late and “quiescent” skin lesions of
FDE (Fig.8c, d).
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Fig. 8 Fixed drug eruption (FDE). (a) Bullous FDE with detached epidermis showing apoptotic keratinocytes, ischaemic necrosis and regenerated epidermis. Haematoxylin and eosin ×100. (b) FDE showing an inter­face dermatitis with numerous lymphocytes inltrating the vacuolized basal layers of the epidermis and scattered apoptotic keratinocytes. Haematoxylin and eosin ×200.
9 Symmetrical Drug-Related
Intertriginous andFlexural Exanthem (SDRIFE)
The histopathological features of SDRIFE have not been studies in detail. In our experience, SDRIFE shows a wide range of pathological pat­terns, including eczematous changes, sub-corneal pustules, supercial dermal oedema and an inam­matory inltrate which may contain lymphocytes, neutrophils and eosinophils. The diagnosis of SDRIFE is not made from the dermatopathology; however, assessment of a skin biopsy can support the diagnosis in the correct clinical setting.
(c) Quiescent FDE with numerous melanophages in the
supercial dermis with apparently normal overlying epi-
dermis. Haematoxylin and eosin ×200. (d) The same
sample as (c) showing a mild T-cell inltrate of CD8+
effector cells aligned along the basement membrane zone.
Anti-CD8 immunohistochemistry (DAB) ×200
10 Problems ofDierential
Diagnosis inDrug Eruption Dermatopathology
Histopathological discrimination of SJS/TEN
from other conditions presenting with extensive
epidermal necrolysis is challenging. Severe cases
of erythema multiforme, lupus erythematosus,
dermatomyositis and GVHD can all share physi-
cal and dermatopathological manifestations with
SJS/TEN.In this acute scenario conrmation of
drug-induced SJS/TEN can only be achieved fol-
lowing a careful and informed synthesis of clini-
cal and dermatopathological features.
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Similarly, dermatopathological differentiation between a drug-induced exanthem, DRESS syn­drome and a viral exanthem is difcult. This diagnostic obstacle may reect the proposed role of herpesvirus reactivation in DRESS, an hypoth­esis supported by the identication of EBV­specic clonal T-cells in DRESS-affected organs (Picard etal. 2010). Some authors even suggest that DRESS is a viral disease triggered by medi­cation, a herpesvirus-drug synergy which is well­documented by the eruption occurring in infectious mononucleosis treated with penicillin.
Of greater concern is the differentiation of DRESS from cutaneous T-cell lymphoma (CTCL). Features shared by DRESS and T-cell lymphomas include rash (especially erythro­derma), lymphadenopathy, eosinophilia, and the presence of circulating atypical lymphocytes. Histologically, the inltrate in DRESS may be composed of atypical lymphocytes, strongly resembling those seen in Sezary syndrome (Ortonne etal. 2015). The key features which dis­criminate DRESS from lymphoma include the presence of inammatory alterations of the epi­dermis, the absence of pan-T-cell antigens loss, the negative search for neoplastic T-cell markers, such as CD158k/KIR3DL2in Sezary syndrome (SS) (Ortonne etal. 2006, 2008) and TFH differ­entiation markers in angioimmunoblastic T-cell lymphoma (AITL) (Leclaire Alirkilicarslan etal.
2017). DRESS patients will not possess a domi-
nant T-cell clone in the skin and blood. The lym­phocyte inltrates in DRESS are usually enriched in cytotoxic CD8+ effectors T-cells, some of which correspond to the morphologically atypi­cal cells. By contrast, the neoplastic T-cells in SS and AITL are constantly CD4+. The mutational landscape of AITL is well described and recur­rent mutations affecting epigenetic regulators (IDH2 p.R172K/S) or the small RhoA GTPase (RHOA p.G17V) are recognized (Sakata­Yanagimoto etal. 2014; Lemonnier etal. 2016).
Despite the problems in differential diagnosis, dermatopathology plays a key role in the assess­ment of drug-induced skin disease. An under­standing of common histopathological features and disease patterns helps the physician both to
implicate medication as a trigger and to assign a specic drug eruption diagnosis. A skin biopsy and application of the dermatopathological prin­ciples outlined above have primacy in the man­agement of all patients with a suspected cutaneous adverse drug reaction.
References
Abe R, Shimizu T, Shibaki A, Nakamura H, Watanabe H,
Shimizu H.Toxic epidermal necrolysis and Stevens– Johnson syndrome are induced by soluble Fas ligand. Am J Pathol. 2003;162(5):1515–20.
Ackerman AB. Histologic diagnosis of inammatory
skin diseases: an algorithmic method based on pat­tern analysis. 2nd ed. Baltimore: Williams & Wilkins;
1997. p.943.
Amode R, Ingen-Housz-Oro S, Ortonne N, Bounfour T,
Pereyre S, Schlemmer F, etal. Clinical and histologic features of mycoplasma pneumoniae-related erythema multiforme: a single-center series of 33 cases com­pared with 100 cases induced by other causes. J Am Acad Dermatol. 2018;79(1):110–7.
Arnold R, Seifert M, Asadullah K, Volk HD.Crosstalk
between keratinocytes and T lymphocytes via Fas/ Fas ligand interaction: modulation by cytokines. J Immunol. 1999;162(12):7140–7.
Bouvresse S, Valeyrie-Allanore L, Ortonne N,
Konstantinou MP, Kardaun SH, Bagot M, etal. Toxic epidermal necrolysis, DRESS, AGEP: do overlap cases exist? Orphanet J Rare Dis. 2012;25(7):72.
Chessman D, Kostenko L, Lethborg T, Purcell AW,
Williamson NA, Chen Z, et al. Human leukocyte antigen class I-restricted activation of CD8+ T cells provides the immunogenetic basis of a systemic drug hypersensitivity. Immunity. 2008;28(6):822–32.
Cho Y-T, Lin J-W, Chen Y-C, Chang C-Y, Hsiao C-H,
Chung W-H, et al. Generalized bullous xed drug eruption is distinct from Stevens–Johnson syndrome/ toxic epidermal necrolysis by immunohistopathologi­cal features. J Am Acad Dermatol. 2014;70(3):539–48.
Chung W-H, Hung S-I, Yang J-Y, Su S-C, Huang S-P,
Wei C-Y, etal. Granulysin is a key mediator for dis­seminated keratinocyte death in Stevens–Johnson syndrome and toxic epidermal necrolysis. Nat Med. 2008;14(12):1343–50.
de Araujo E, Dessirier V, Laprée G, Valeyrie-Allanore
L, Ortonne N, Stathopoulos EN, etal. Death ligand TRAIL, secreted by CD1a+ and CD14+ cells in blister uids, is involved in killing keratinocytes in toxic epidermal necrolysis. Exp Dermatol. 2011;20(2):107–12.
Deschamps O, Ortonne N, Hüe S, Rodriguez C, Deschodt
C, Hirsch G, et al. Acute exanthemas: a prospective study of 98 adult patients with an emphasis on cyto-