Impetigo herpetiformis is a form of severe pustular psoriasis occurring in pregnancy[1][2] which may occur during any trimester.[3][4]
Signs and symptoms
The typical lesions are centrifugally extending erythematous patches with marginally grouped sterile pustules; they can also develop erosion, crust, and impetiginization. These lesions are mainly seen in flexural regions. Patients may experience vegetative lesions resembling Pemphigus vegetans, though they are uncommon.[5] It is possible to see mucosal lesions in the tongue, mouth, and even esophagus in addition to nail involvement.[6]
The cause of impetigo herpetiformis is not yet clear.[8] Some evidence suggests that genetic factors may play a role in the development of impetigo herpetiformis, such as the number of familial cases.[9]
Diagnosis
The diagnosis of impetigo herpetiformis is supported by clinical and laboratory findings, and histological examination primarily reveals neutrophilc inflammatory infiltrate, epidermal acanthosis, and papillomatosis with focal parakeratosis.[10] Spongiform pustules of Kogoj are intraepidermal multilocular microabscesses that are formed by neutrophil collections.[11]
Pustular psoriasis is still primarily treated with systemic corticosteroids, which have been used for many years.[13] If a patient is not responding to corticosteroids, cyclosporine may be a useful medication.[14] In impetigo herpetiformis, the use of antibiotics appears to be beneficial, despite the fact that they cannot completely eradicate the illness.[15][16]
^Sárdy, M; Preisz, K; Berecz, M; Horváth, C; Kárpáti, S; Horváth, A (May 5, 2006). "Methotrexate treatment of recurrent impetigo herpetiformis with hypoparathyroidism". Journal of the European Academy of Dermatology and Venereology. 20 (6). Wiley: 742–743. doi:10.1111/j.1468-3083.2006.01473.x. ISSN0926-9959. PMID16836512. S2CID46004532.
^Breier-Maly, J.; Ortel, B.; Breier, F.; Schmidt, J.B.; Hönigsmann, H. (1999). "Generalized Pustular Psoriasis of Pregnancy (Impetigo herpetiformis)". Dermatology. 198 (1). S. Karger AG: 61–64. doi:10.1159/000018066. ISSN1018-8665. PMID10026404. S2CID21334983.
^Gao, Qian-Qian; Xi, Ming-Rong; Yao, Qiang (2013). "Impetigo Herpetiformis during Pregnancy: A Case Report and Literature Review". Dermatology. 226 (1). S. Karger AG: 35–40. doi:10.1159/000346578. ISSN1018-8665. PMID23446290. S2CID42999570.
^Luan, Li; Han, Shixin; Zhang, Zhenying; Liu, Xiaoming (December 10, 2013). "Personal treatment experience for severe generalized pustular psoriasis of pregnancy: two case reports". Dermatologic Therapy. 27 (3). Hindawi Limited: 174–177. doi:10.1111/dth.12112. ISSN1396-0296. PMID24517287. S2CID37248288.
^Tintinger, G. R.; Anderson, R.; Feldman, C. (March 15, 2013). "Pharmacological approaches to regulate neutrophil activity". Seminars in Immunopathology. 35 (4). Springer Science and Business Media LLC: 395–409. doi:10.1007/s00281-013-0366-8. ISSN1863-2297. PMID23494251. S2CID253808218.