Subcorneal pustular dermatosis, initially known as Sneddon-Wilkinson disease, is considered to be a rare cutaneous disorder that belongs to a group of neutrophilic dermatoses [1] [2] [3]. Although the exact etiology remains to be elucidated, skin lesions arise due to an abundant presence of neutrophils below the stratum corneum, presumably as a result of the activity of pro-inflammatory cytokines such as interleukin-8 that act as chemoattractants for neutrophils [2] [4]. For some reason, subcorneal pustular dermatosis is most commonly diagnosed in middle-aged and older women aged 40 or more years [1] [3]. The clinical presentation is characterized by the appearance of sterile pustular lesions on the trunk, the intertriginous areas (the axillae, the submammary areas, and the groins), and the flexor areas of the upper or lower limbs [2] [3] [5] [6] [7] [8]. These pustules are symmetrically distributed and often form blistering lesions [3] [5] [6]. Despite the benign and self-limiting nature of the condition, a chronic course with frequent recurrences are hallmarks of subcorneal pustular dermatosis, which may be debilitating for the patient [1] [3]. Because of the undisclosed cause, the precipitating factors for recurrence are yet to be revealed.

• Fishing

  […] myocardiopathy (紅) 【紅色肥厚症】*erythroplasia 【紅斑】*erythema 【紅斑角皮症】*erythrokeratodermia 【紅斑性湿疹】*eczema erythematosum[L] 【紅斑性天疱瘡】*pemphigus erythematosus[L] 【紅斑性狼瘡】*lupus erythematosus[L] 【紅板症】*erythroplakia 【紅皮症】*erythroderma 【紅変歯】 *erythrodontia 赤色歯 (鈎) 【鈎状胃】*fish-hook [medo.jp]

• Rectal Discharge

  A man aged 56 years with a history of ulcerative colitis (UC) status postsubtotal colectomy was hospitalised with fevers, dry cough, eye redness and a new bloody, mucoid rectal discharge. 2 months prior to admission, the dermatologist had started him [ncbi.nlm.nih.gov]

  discharge. 2 months prior to admission, the dermatologist had started him on dapsone for subcorneal pustular dermatosis but did not recognise that he had recently self-discontinued mesalamine enemas, inducing a flare of his UC. [casereports.bmj.com]

• Blister

  The H&E staining demonstrated typical features of SPD, including some damage within dermal pilosebaceous units subjacent to the subcorneal blistering process. [ncbi.nlm.nih.gov]

  OLS Experimental Factor Ontology EFO EFO:1000771 Skin diseases characterized by local or general distributions of blisters. They are classified according to the site and mode of blister formation. [ebi.ac.uk]

• Eczema

  Cheiropompholyx, Dyshidrotic Eczema, Pompholyx, Podopompholyx,) Stasis Dermatitis (42 %) ( Congestion Eczema, Gravitational Dermatitis, Gravitational Eczema, Stasis Eczema, Varicose Eczema,) Toxic Shock Syndrome (39 %) ( Streptococcal Toxic Shock Syndrome [gulfdoctor.net]

  Relapsing polychondritis 673 211 Rhinophyma 677 212 Rocky Mountain spotted fever and other rickettsial infections 679 213 Rosacea 684 214 Sarcoidosis 692 215 Scabies 697 216 Scleredema 700 217 Scleroderma 703 218 Sebaceous hyperplasia 707 219 Seborrheic eczema [books.google.com]

  L20.84 Intrinsic (allergic) eczema Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes. [icd10data.com]

  We use systematic evaluation of common skin conditions with new visual tools such as dermoscopy as well as machine-learning techniques that enabled us to develop eczema-detecting algorithms. [navarinilab.com]

  (more popularly known as dyshidrotic eczema or pompholyx) is an intensely pruritic, vesicular eruption affecting the palms, soles. 14 May 2013 Psoriasis palmoplantar: Cuando caminar duele. [afytuzyr.xpg.uol.com.br]

• Hyperpigmentation

  The pustules were sterile, had some tendency to grouping, were accompanied by moderate to severe pruritus and some hyperpigmentation. They responded fairly well to sulfapyridine and the sulfones. [jamanetwork.com]

  The pustules used to dry up in 6-7 days to form thin, dry crusts that fell leaving hyperpigmentation. There were no oral lesions. Nikolsky sign was negative. A skin biopsy revealed histological features of SCPD. [ijdvl.com]

  There is no atrophy or scarring, but an occasional brownish hyperpigmentation may mark previously affected sites. Variable intervals of quiescence, lasting from a few days to several weeks, may be followed by the sudden development of new lesions. [plasticsurgerykey.com]

  Areas of desquamation, crusting and hyperpigmentation may occur with the rupture of pustules [ 1 ]. Although the etiopathogenesis of disease is not clear, many theories, including infectious and autoimmune mechanisms, have been proposed [ 2 ]. [archives-inflammation.imedpub.com]

• Pruritus

  The pustular eruption typically involves the flexural sites of the trunk and proximal extremities with pruritus and irritation symptoms. [ncbi.nlm.nih.gov]

  621 199 Pruritus ani 629 200 Pruritus vulvae 631 201 Pseudofolliculitis barbae 634 202 Pseudoxanthoma elasticum 638 203 Psoriasis 640 204 Psychogenic excoriation 651 205 Pyoderma gangrenosum 654 206 Pyogenic granuloma 659 207 Radiation dermatitis 662 [books.google.com]

  The pustules were sterile, had some tendency to grouping, were accompanied by moderate to severe pruritus and some hyperpigmentation. They responded fairly well to sulfapyridine and the sulfones. [jamanetwork.com]

  It may be preceded or accompanied by fever and pruritus. [scielo.br]

  Simon de Veer Thesis (PDF 32MB) - QUT ePrints ; Atopic dermatitis, corneocyte, desmosome, desquamation, drug discovery, epidermis, ...... cutaneous side effects, including a pustular rash, dry skin and pruritus (Mascia et ...... in triplicate, after which [wcsbdbmf.cf]

• Pustular Rash

  Pustular rashes - Oxford Medicine ; Introduction316Skin problems presenting with pustules317Pustular rashes of the head and neck318Pustular rashes of trunk and limbs322Acral pustular rashes324Pustular rashes in neonates and infants325(figure 20.1) are [zgxrrbli.cf]

  Simon de Veer Thesis (PDF 32MB) - QUT ePrints ; Atopic dermatitis, corneocyte, desmosome, desquamation, drug discovery, epidermis, ...... cutaneous side effects, including a pustular rash, dry skin and pruritus (Mascia et ...... in triplicate, after which [wcsbdbmf.cf]

  […] and pustular rash, which can be a visible marker of therapeutic efficacy. [52] [53] The rash onset is between weeks 1 and 3 of treatment, peaking between weeks 3 and 5, and resolves 4 weeks after withdrawal of treatment. [online.epocrates.com]

• Myelopathy

  […] relevant points arise from this case: the association of the dermatosis with an IgAlambda myeloma that, as far as we know, has been described only three times previously; the longest period of time between the onset of the dermatosis and that of the myelopathy [ncbi.nlm.nih.gov]

  […] disorder *angiopathy 【血管神経膠腫】*angioglioma 【血管神経膠腫症】*angiogliomatosis 【血管神経症】*vasoneurosis *angioneuropathy 【血管心臓炎】*angiocarditis 【血管性耳炎】*angiotitis ( 耳血管炎) 【血管性水腫】*vascular edema 【血管性痴呆】*vascular dementia 【血管性母斑】*vascular nevus 【血管性ミエロパチー】*vascular myelopathy [medo.jp]

The differential diagnosis of subcorneal pustular dermatosis is broad, encompassing other neutrophilic dermatoses (Sweet's syndrome, acute generalized exanthematous pustulosis, and generalized pustular psoriasis) and systemic conditions that include this cutaneous disorder in the presentation, such as various lymphoproliferative disorders (eg. multiple myeloma) and immunoglobinopathies [1] [2] [3]. For this reason, the identification of subcorneal pustular dermatosis mandates a thorough workup and a histopathological examination. As a first step, however, the physician must obtain a detailed patient history that will identify the chronic and relapsing pattern of the lesions, whereas a physical exam is crucial for observing the pattern of distribution and the appearance of skin lesions. As soon as clinical suspicion is raised, a biopsy sample should be obtained for the purposes of performing a histopathological examination. The hallmark of neutrophilic dermatoses is the presence of a break below the stratum corneum that contains a dense neutrophilic infiltrate with a normal underlying epidermis [1] [5] [7] [8]. Additionally, exclusion of immunoglobinopathies and autoimmune disorders can be made by carrying out an immunofluorescence exam that is virtually always negative [3] [8], although rare cases of immunoglobulin (Ig)A-presenting antibodies in the epidermis were documented, thus pointing toward IgA pemphigus as a potential differential diagnosis [3].

• Coccidioides Immitis

  Abstract Coccidioidomycosis (AKA "Valley fever") is a primary pulmonary infection via airborne spores released from coccidioides immitis in the soil. [ncbi.nlm.nih.gov]

  immitis. ( 26437157 ) Iyengar S....Sharon V.R. 2015 14 Successful treatment of subcorneal pustular dermatosis with maxacalcitol. ( 25991581 ) Hoshina D....Furuya K. 2015 15 Antidesmocollin 1 autoantibody negative subcorneal pustular dermatosis-type IgA [malacards.org]

  Subcorneal pustular dermatosis associated with Coccidioides immitis. Dermatol Online J. 2015 Aug 15. 21 (8): [Medline]. Taniguchi S, Tsuruta D, Kutsuna H, Hamada T. Subcorneal pustular dermatosis in a patient with hyperthyroidism. [emedicine.medscape.com]

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3. Ratnarathorn M, Newman J. Subcorneal pustular dermatosis (Sneddon-Wilkinson disease) occurring in association with nodal marginal zone lymphoma: a case report. Dermatol Online J. 2008;14(8):6.
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7. Nischal KC, Khopkar U. An approach to the diagnosis of neutrophilic dermatoses: A histo-pathological perspective. Indian J Dermatol Venereol Leprol. 2007;73:222–230.
8. Kretschmer L, Maul J-T, Hofer T, Navarini AA. Interruption of Sneddon-Wilkinson Subcorneal Pustulation with Infliximab. Case Rep Dermatol. 2017;9(1):140-144.