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Shahin, A., R. Yousef, S. Hussein, M. Niazy, D. Attia, M. AlMasry, S. Shalaby, H. A. El-Kader, M. Bahgat, D. Teleb, et al., "Widespread Necrotizing Purpura and Lucio Phenomenon as the First Diagnostic Presentation of Diffuse Nonnodular Lepromatous Leprosy", CUTIS, vol. 108, pp. E4-E8, 2021.
Enany, G. E., N. Nagui, H. Nada, S. Shalaby, I. Sany, A. Nada, S. Orabi, O. El Ghanam, and M. R. E. Abdel-Halim, "Widespread Keratotic Spiky Follicular Papules Associated With Hyperpigmentation: Answer.", The American Journal of dermatopathology, vol. 42, issue 10, pp. 787-788, 2020.
Abdel-Halim, M. R. E., M. M. Fawzy, M. A. Saleh, S. Ibrahim, E. El Nabarawy, A. E. L. Tawdy, M. A. El-latif, S. Shalaby, M. Amer, M. S. El Hawary, et al., "What is your diagnosis? Clinicopathological correlation", Journal of the Egyptian Women’s Dermatologic Society, vol. 12, no. 2: LWW, pp. 142–143, 2015. Abstract
El-Darouti, M. A., S. A. Marzouk, O. Azzam, M. M. Fawzi, M. R. E. Abdel-Halim, A. A. Zayed, and T. M. Leheta, "Vitiligo vs. hypopigmented mycosis fungoides (histopathological and immunohistochemical study, univariate analysis)", European Journal of Dermatology, vol. 16, no. 1, pp. 17–22, 2006. Abstract
Elbendary, A., M. R. E. Abdel-Halim, and G. Ragab, "Updates in cutaneous manifestations of systemic vasculitis.", Current opinion in rheumatology, vol. 34, issue 1, pp. 25-32, 2022. Abstract

PURPOSE OF REVIEW: The main purpose of this review is to present newly reported cutaneous manifestations of systemic vasculitis, updates in investigations to verify systemic involvement in cases with cutaneous vasculitis and new therapeutic guidelines. The spectrum of COVID-19-related vasculitis is also covered.

RECENT FINDINGS: Only a few reports highlighted new cutaneous presentations or associations with some systemic vasculitic entities. For example, the association of inflammatory disorders with Takayasu arteritis, the importance of considering Kawasaki disease in febrile children with erythema nodosum, the development of necrotic ulcers on fingers and toes in Behçet's disease and the possible presence of polyarteritis nodosa-like pathological features in vulvar ulcers of Behçet's disease. New attempts to classify cutaneous manifestations of giant cell arteritis (GCA) and antineutrophil cytoplasmic antibody-associated vasculitis (AAV) and the diagnostic investigations for cutaneous vasculitis cases to verify systemic involvement are discussed. Treatment of systemic vasculitis with cutaneous vasculitis should be tailored according to disease status. A plethora of reports in the past 2 years focused on the broad spectrum of COVID-19 vasculitic manifestations.

SUMMARY: Although newly reported cutaneous manifestations of systemic vasculitis are relatively uncommon, the plethora of reports in the past 2 years on COVID-19 vasculitis necessitates the expansion of the classification of vasculitis associated with probable cause to include severe acute respiratory syndrome coronavirus-2 (SARS-Cov-2) vasculitis.

AbdElhalim, M., M. Fawzy, M. Saleh, S. Ismail, S. Doss, E. El Nabarawy, A. E. L. Tawdy, M. A. Latif, S. Shalaby, M. Amer, et al., "Unilateral facial papules and plaques", Cutis, vol. 103, issue 4, pp. 198-, 201-202, 2019.
El-Enany, G., N. Nagui, H. Nada, O. El Ghanam, N. Kadry, M. R. E. Abdel-Halim, and A. Elbendary, "Swollen fissured vulva.", Clinical and experimental dermatology, 2020.
El-Mofty, M., M. El-Darouti, H. RASHEED, D. A. Bassiouny, M. Abdel-Halim, N. S. Zaki, G. El-Hanafy, H. El-Hadidi, O. Azzam, A. El-Ramly, et al., "Sulfasalazine and pentoxifylline in psoriasis: a possible safe alternative", Journal of Dermatological Treatment, vol. 22, no. 1: Informa Healthcare USA on behalf of Informa UK Ltd. London, pp. 31–37, 2011. Abstract
EL-KOMY, M. O. H. A. M. E. D. H. U. S. S. E. I. N. M. E. D. H. A. T., M. R. Abdel-Halim, E. A. El-Nabarawy, S. El-Tobshy, S. Shalaby, and A. I. Kamel, "Subungual nodule with recurrent bleeding", Journal of the American Academy of Dermatology, vol. 67, no. 5: Mosby, pp. e229–e230, 2012. Abstract
El Mofty, M. A., R. M. Youssef, S. O. Tawfic, M. R. E. Abdel Halim, H. Abozeid, O. G. Shaker, and O. M. Mohammad, "Skin and serum levels of calcium, phosphorus and vitamin D3 in uremic pruritus patients before and after broad band ultraviolet B (UVB) phototherapy", Egypt Dermatol Online J, vol. 2, 2006. Abstract
Abdel-Halim, M. R. E., E. El Nabarawy, A. El-Tawdy, G. El-Enany, M. Soliman, H. Weshahy, H. A. S. Fayed, and R. Hegazy, "Sclerotic Ulcerated Plaque on the Back.", The American Journal of dermatopathology, vol. 41, issue 4, pp. 314-315, 2018 Apr 11, 2019.
Elbendary, A., R. Youssef, M. R. E. Abdel-Halim, D. abd el halim, D. A. El Sharkawy, M. Alfishawy, M. A. Gad, A. A. Gad, and M. F. Elmasry, "Role of streptococcal infection in the etiopathogenesis of pityriasis lichenoides chronica and the therapeutic efficacy of azithromycin: a randomized controlled trial.", Archives of dermatological research, 2022. Abstract

The exact aetiology of pityriasis lichenoides chronica (PLC) remains unknown. While phototherapy is the most investigated therapeutic modality, azithromycin has been used scarcely. The aim of this study is to evaluate the therapeutic efficacy of azithromycin in the treatment of PLC compared to NB-UVB and evaluating the presence of streptococcal infection as a possible etiological factor in PLC patients. The study was designed as a randomised controlled trial. Twenty-four patients with PLC were randomly allocated into either azithromycin (n = 13, standard dose every 10 days) or NB-UVB (n = 11, thrice weekly) groups. End of study (EOS) was either complete clearance of lesions or a maximum of 8 weeks. Therapeutic efficacy was defined as percent reduction in lesions and was calculated for the rash as a whole, erythematous papules alone, and hypopigmented lesions alone and graded into complete, very-good, good, poor or no response. Anti-streptolysin O titre (ASOT), anti-deoxyribonuclease B titre (anti-DNaseB) and throat culture were evaluated at day 0. No significant difference existed between both groups as regards therapeutic efficacy. At EOS, NB-UVB achieved significantly more percent reduction in the extent of hypopigmented lesions and consequently in the rash as a whole (p = 0.001, p = 0.034, respectively). The extent of the rash as a whole was significantly less in the NB-UVB at EOS (p = 0.029, respectively). The effect of NB-UVB on hypopigmented lesions appeared early at week 4 of treatment. Only two patients, one from each group, relapsed during the 3 month follow-up. Evidence of recent streptococcal infection was present in 79% of the cases, mainly in the form of elevated ASOT (94.7%). It was significantly more encountered in young children (< 13 years) (p = 0.03) and was associated with more extent of erythematous papules and consequently with more extent of the rash as a whole (p = 0.05 and p = 0.01, respectively). It did not affect outcome of therapy at EOS. Azithromycin did not show more favorable response in patients with recent streptococcal infection. Therapeutic efficacy of azithromycin is comparable to NB-UVB in treatment of PLC; however, NB-UVB is superior in management of hypopigmented lesions. It is highly suggested that PLC could be a post streptococcal immune mediated disorder.Registration number:, NCT03831269.

Shaker, O. G., W. Moustafa, S. Essmat, M. Abdel-Halim, and M. El-Komy, "The role of interleukin-12 in the pathogenesis of psoriasis", Clinical biochemistry, vol. 39, no. 2: Elsevier, pp. 119–125, 2006. Abstract
El Darouti, M., S. A. Marzouk, M. Fawzi, M. Rabie, A. El Tawdi, and M. Abdel Azziz, "Reticulate acropigmentation of Dohi: a report of two new associations", International journal of dermatology, vol. 43, no. 8: Wiley Online Library, pp. 595–596, 2004. Abstract
Youssef, R., M. R. E. Abdel-Halim, D. M. ABDELHALIM, M. M. Fawzy, M. F. Hussein, M. F. Elmasry, S. S. Sayed, and N. M. Abo Eid, "PUVA-induced pityriasis lichenoides chronica-like papular lesions in patients with mycosis fungoides: a clinical, histopathological and immunohistochemical study.", Archives of dermatological research, 2019. Abstract

Mycosis fungoides (MF) is the most common form of cutaneous T cell lymphoma (CTCL) with many clinical variants including papular and pityriasis lichenoides chronica (PLC)-like variants. During psoralen and ultraviolet A (PUVA) treatment of MF, PLC-like papular lesions were observed to appear. The exact nature of these lesions is not fully understood. This work aimed to study PLC-like papular lesions arising in MF patients receiving PUVA therapy clinically, histopathologically and immunohistochemically (using monoclonal antibodies against CD4 and CD8) and to compare them with lesions in classic PLC patients. Fifteen MF patients with PLC-like papular lesions arising during PUVA treatment were included and 15 patients with classic PLC served as controls. While the extent of these lesions significantly correlated with their duration (p < 0.05), it showed no significant correlation with the TNMB stage of MF, number of phototherapy sessions or cumulative UVA dose at which they started to appear. The response status of MF to PUVA did not affect their development. Compared to classic PLC, these lesions showed significantly more acute onset (p = 0.003). None of these lesions showed histopathological features essential to diagnose papular/PLC-like MF and no significant difference existed with regard to their histopathological and CD4/CD8 phenotypic features compared to classic PLC. Papular lesions mimicking PLC in MF patients receiving PUVA mostly represent an upgrading reaction with possible good prognostic implication.

El-Darouti, M. A., S. A. Marzouk, M. H. M. El-Komy, and M. RE, "Preliminary Clinical, Histopathological and Laboratory Study of Cases Presenting with Pruriginous Edematous Excoriated Papular Eruption (Subacute Prurigo)", Kasr Al Aini Medical Journal, vol. 13, no. 1, pp. 7–13, 2007. Abstract
El-Enany, G., M. El-Mofty, M. R. E. Abdel-Halim, D. Dermpath, N. Nagui, H. Nada, M. A. Saleh, I. Sany, A. Nada, O. El-Ghanam, et al., "Postpartum Castleman disease presenting as paraneoplastic pemphigus: a case report.", International journal of dermatology, vol. 62, issue 3, pp. e111-e113, 2023.
Komy, M. E. L., E. El-Nabarawy, H. Abdelkader, M. R. E. Abdel-Halim, and R. AlAguizy, "Pigmentary mosaicism and extracutaneous defects: a case report of a rare form of twin spotting", Pigment International, vol. 8, pp. 176-8, 2021.
El-Mofty, M. A., S. M. Esmat, and M. R. E. Abdel-Halim, "Pigmentary disorders in the Mediterranean area", Dermatologic clinics, vol. 25, no. 3: Elsevier, pp. 401–417, 2007. Abstract
Esmat, S. M., M. R. E. Abdel-Halim, H. I. GAWDAT, M. Kamel, A. E. Ramly, K. Helmy, and S. M. Esmat, "Persistent Pixel Stamping Marks: a novel complication of fractional CO laser in scar treatment.", Lasers in medical science, 2019 Jan 04. Abstract

Fractional CO laser rejuvenation of scars offers a high safety profile. Laser marks usually disappear clinically within 1 week. The authors observed occasional persistence of the laser marks on the scar surface. The purpose of this study is to report the incidence and to describe the clinical, dermoscopic, and histological features of a novel observed complication of fractional CO laser scar rejuvenation "Persistent Pixel Stamping Marks (PPSM)".One hundred seventy-one cases were consecutively recruited from patients assigned for fractional CO laser scar rejuvenation. Patients who developed the phenomenon 1 month post laser session were recorded and subjected to clinical photography, dermoscopy, and optical coherence tomography (OCT) as well as a 4-mm punch biopsy from pixelated scars. The evolution of PPSM was followed up for 6 months. PPSM developed in 16 patients (9.4%), 15 of which were post burn hypertrophic scars. PPSM was significantly related to darker skin type, darker scar color, and longer scar duration. Histopathological findings included characteristic holes in stratum corneum and superficial dermis, thick collagen bundles perpendicular to the skin surface with loss of elastic tissue, focal interface changes, and triangular focus of fibroblastic proliferation. The marks disappeared in 5 and lasted in 11 patients. Their longevity was significantly related to longer dwell times and lower densities. PPSM represent miniature scarring at the sites of the microscopic thermal zones or a sign of their delayed healing. They tend to follow fractional CO laser resurfacing of hyperpigmented, long-standing burn scars. Longer dwell times and lower densities make them last longer.

El-Nabarawy, E. A., N. Saleh, and M. R. E. Abdel-Halim, "Peculiar papular eruption on the vulva and inguinal folds.", Journal of clinical pathology, vol. 72, issue 2, pp. 185, 2018 Dec 20, 2019. Abstract

CLINICAL QUESTION: A 26-year-old woman presented with asymptomatic skin coloured to whitish keratotic papules on the vulva, inguinal folds and inner thighs of 6 years duration. She had no similar lesions elsewhere and no family history. A biopsy was taken from one of the papules.Review the high-quality, interactive digital Aperio slide at and consider your diagnosis. WHAT IS YOUR DIAGNOSIS?: Darrier's diseaseHailey-Hailey diseaseGenital wartsPapular acantholytic dyskeratosis of genitocrural areaPemphigus vegetansThe correct answer is after the discussion.

DISCUSSION: Papular acantholytic dyskeratosis (PAD) of the genitocrural area is a peculiar acantholytic dermatosis with dyskeratosis localised to the vulva and inguinal folds with possible extension to the thighs and perineum.1 It mainly involves young or middle-aged females.1 Cases affecting males and involving genitalia, thighs and perianal region have been reported.2 It represents an allelic variant of Hailey-Hailey disease as heterozygous mutations in gene (intron 5 and exon 24) have been reported in some cases.3 Clinically, PAD of the genitocrural area is typically characterised by solitary or grouped keratotic flesh coloured or white papules.1 Other clinical presentations include: vesicles, bullae, patches and plaques.4 Although the lesions are mainly asymptomatic, patients may experience variable degrees of itching or burning sensation.Histopathologically, the lesions show hyperkeratosis, hypergranulosis, acanthosis and acantholytic dyskeratosis in the spinous layer (figure 1). Typically, direct immunoflourescence (DIF) is negative.5 jclinpath;jclinpath-2018-205434v1/F1F1F1Figure 1Photomicrograph representing histopathological findings: hyperkeratosis, hypergranulosis, acanthosis and acanthloytic dyskeratosis involving the spinous layer; 254×143 mm.The most important differential diagnoses of this sporadic condition include: Darier's and Hailey-Hailey, both of which are familial. Hailey-Hailey involves also other flexural areas and presents with eroded crusted lesions with foul odour. Pathologically, the acantholytic process in PAD of the genitocrural area is rather focal compared with the broad zone of acantholysis in Hailey-Hailey, and columns of parakeratosis overlying suprabasilar acantholysis are characteristic of Darier's disease. Although, some cases of PAD of the genitocrural area can present with vesicles and bullae, the presence of dyskeratotic cells and the negative DIF speaks against pemphigus.Treatment options for this condition include topical and systemic retinoids. Cryotherapy and laser have been also reported to be effective. Topical steroids might be effective in reducing pruritus.

Abdelkader, H. A., J. Hamdan, A. Elbendary, and M. R. E. Abdel-Halim, "Papillary eccrine adenoma presenting as a cutaneous horn.", International journal of dermatology, 2021.
El-Darouti, M. A., S. A. Marzouk, N. Nabil, M. R. E. Abdel-Halim, M. H. M. El-Komy, and M. Abdel-Latif, "Pachyonychia congenita: treatment of the thickened nails and palmoplantar circumscribed callosities with urea 40% paste", Journal of the European Academy of Dermatology and Venereology, vol. 20, no. 5: Wiley Online Library, pp. 615–617, 2006. Abstract
Abdelkader, H. A., Y. Abdel-Galeil, A. Elbendary, M. El-Mofty, and M. R. E. Abdel-Halim, "Multiple Skin Ulcers in a Rheumatoid Arthritis Patient: Challenge.", The American Journal of dermatopathology, vol. 42(2), pp. e20-e21, 2018 Dec 07, 2020.
El-Darouti, M. A., S. A. Marzouk, and M. R. E. Abdel-Halim, "Muckle–Wells syndrome: report of six cases with hyperpigmented sclerodermoid skin lesions", International journal of dermatology, vol. 45, no. 3: Wiley Online Library, pp. 239–244, 2006. Abstract