scholarly journals A flickering cutaneous lesion occurring after an insect bite

2021 ◽  
Vol 9 (11) ◽  
Author(s):  
Tymen Hodde ◽  
Bart Spaetgens
Keyword(s):  
Cutaneous Lesion

scholarly journals Acanthamoeba spp. as Agents of Disease in Humans

2003 ◽  
Vol 16 (2) ◽  
pp. 273-307 ◽  
Author(s):  
Francine Marciano-Cabral ◽  
Guy Cabral
Keyword(s):  
Cerebrospinal Fluid ◽  
Cutaneous Lesion ◽  
Laboratory Diagnosis ◽  
Immune Defense ◽  
In Vitro Cultivation ◽  
Cutaneous Lesions ◽  
Trophozoite Stage ◽  
Biopsy Material ◽  
Pathogenic Potential

SUMMARY Acanthamoeba spp. are free-living amebae that inhabit a variety of air, soil, and water environments. However, these amebae can also act as opportunistic as well as nonopportunistic pathogens. They are the causative agents of granulomatous amebic encephalitis and amebic keratitis and have been associated with cutaneous lesions and sinusitis. Immuno compromised individuals, including AIDS patients, are particularly susceptible to infections with Acanthamoeba. The immune defense mechanisms that operate against Acanthamoeba have not been well characterized, but it has been proposed that both innate and acquired immunity play a role. The ameba's life cycle includes an active feeding trophozoite stage and a dormant cyst stage. Trophozoites feed on bacteria, yeast, and algae. However, both trophozoites and cysts can retain viable bacteria and may serve as reservoirs for bacteria with human pathogenic potential. Diagnosis of infection includes direct microscopy of wet mounts of cerebrospinal fluid or stained smears of cerebrospinal fluid sediment, light or electron microscopy of tissues, in vitro cultivation of Acanthamoeba, and histological assessment of frozen or paraffin-embedded sections of brain or cutaneous lesion biopsy material. Immunocytochemistry, chemifluorescent dye staining, PCR, and analysis of DNA sequence variation also have been employed for laboratory diagnosis. Treatment of Acanthamoeba infections has met with mixed results. However, chlorhexidine gluconate, alone or in combination with propamidene isethionate, is effective in some patients. Furthermore, effective treatment is complicated since patients may present with underlying disease and Acanthamoeba infection may not be recognized. Since an increase in the number of cases of Acanthamoeba infections has occurred worldwide, these protozoa have become increasingly important as agents of human disease.

Penile Lichen Sclerosus and “Nevus Elasticus”

2021 ◽  
pp. 1-3
Author(s):  
Maiara Ferreira de Souza ◽  
Wendel Souza Kruschewsky ◽  
Nathanael de Freitas Pinheiro Junior ◽  
Daniel Abensur Athanazio
Keyword(s):  
Blood Vessels ◽  
Cutaneous Lesion ◽  
Lichen Sclerosus ◽  
Elastic Fibers ◽  
Deep Dermis

The association between penile lichen sclerosus and striking accumulation of elastic fibers in deep dermis has been described in rare reports, mostly in vulvar lesions. We describe one case of severe balanopreputial adhesions related to lichen sclerosus and this form of elastosis, with no concomitant neoplasia. Aggregates of elastic fibers were seen in deep dermis and in blood vessels. The lesion mirrors nevus elasticus and nevus elasticus vascularis – a well described cutaneous lesion with no known association with lichen sclerosus.

scholarly journals Role of the autologous mesenchymal stem cells compared with platelet rich plasma on cicatrization of cutaneous wounds in diabetic mice

2016 ◽  
Vol 36 (7) ◽  
pp. 617-624
Author(s):  
Napoleão M. Argolo Neto ◽  
Ricardo J. Del Carlo ◽  
Betânia S. Monteiro ◽  
Nance B. Nardi ◽  
Pedro C. Chagastelles ◽  
...  
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Platelet Rich Plasma ◽  
Cutaneous Lesion ◽  
Healing Time ◽  
Diabetic Mice ◽  
Cutaneous Lesions ◽  
Cutaneous Wounds ◽  
Autologous Mesenchymal Stem Cells ◽  
Treatment Of Wounds

Abstract: Chronic cutaneous lesions affect 15% of diabetic human patients and represent a risk 15 to 46 times larger of limb amputations compared to people with normal glycemia. It is assumed that half of these amputations could be prevented by early treatment of wounds, for example, with proper cell therapy. Objectives: In this study, the action of the autologous transplant of mesenchymal stem-cells (MSC) was evaluated compared to the treatment with autologous platelet rich plasma (PRP) in the cicatrization of cutaneous lesions induced in diabetic mice. These animals were previously treated with streptozootocin to induce diabetes mellitus and round wounds of 1.5cm in diameter were created in the posterior region. Diameters of the wounds and healing time were evaluated during 30 days and the results were submitted to variance analysis and Tukey's test average. It was noticed that the animals treated with MSC presented a more accelerated cicatrization of the cutaneous lesion than the animals treated with PRP. However, the treatment with PRP presented better results than just the daily asepsis of the lesions with saline or covering them with semi-permeable bandage. Besides, the use of semi-permeable bandage kept the cutaneous lesions of diabetic mice did not interfere negatively with cicatrization, proved to be harmless to use, but kept the cutaneous lesions more hydrated than the ones exposed to the environment.

Becker's Nevus Syndrome

2018 ◽  
Vol 16 (05) ◽  
pp. 352-361 ◽  
Author(s):  
Maria Cucuzza ◽  
Sara Paternò ◽  
Stefano Catanzaro ◽  
Agata Polizzi ◽  
Carmelo Schepis ◽  
...  
Keyword(s):  
Natural History ◽  
Soft Tissues ◽  
Cutaneous Lesion ◽  
Simultaneous Occurrence ◽  
Pectus Carinatum ◽  
Epidermal Nevus ◽  
Becker’S Nevus ◽  
History Of ◽  
Prepubertal Boys ◽  
Postzygotic Mutations

The simultaneous occurrence of a patch of light or dark brown hyperpigmentation with hypertrichosis (Becker's nevus) together with (usually ipsilateral) soft tissues hypoplasia (especially breast, in women) and underlying skeletal anomalies (i.e., vertebral hypoplasia, scoliosis, pectus carinatum or excavatum) represents the Becker's nevus syndrome (BNS) phenotype. It was first described (as a single cutaneous lesion) by Becker in 1949 and then associated with the surrounding musculoskeletal disorders. The syndrome has also been reported as pigmentary hairy epidermal nevus syndrome. Less than 100 cases have been reported in the literature, with a slightly higher incidence in females and only few familiar cases: paradominant postzygotic mutations and/or an androgen-dependent hyperactivation have been reported as the causes of the diseases.The extracutaneous lesions are congenital and nonprogressive, and the natural history of the Becker's nevus is the same as that of isolated nevi: in prepubertal boys, the pigmentation may be less intense and the hairiness may be absent or mild, as occurs in women, whereas in men, there is an increase of hairiness after puberty. The treatment is essentially cosmetic, and potential therapeutic options include electrolysis, waxing, makeup, or laser.

Lower Lumbosacral Cutaneous Lesion in a Newborn

NeoReviews ◽  
2010 ◽  
Vol 11 (1) ◽  
pp. e44-e47
Author(s):  
B. Ennis ◽  
L. M. Nantais-Smith
Keyword(s):  
Cutaneous Lesion

Nevus Spilus with Synchronous Melanomas: Case Report and Literature Review

2009 ◽  
Vol 13 (2) ◽  
pp. 96-101 ◽  
Author(s):  
Ari-Nareg Meguerditchian ◽  
Richard T. Cheney ◽  
John M. Kane
Keyword(s):  
Case Report ◽  
Literature Review ◽  
Malignant Transformation ◽  
Absolute Risk ◽  
Cutaneous Lesion ◽  
Pertinent Literature ◽  
The Absolute ◽  
Management Recommendations

Background: Nevus spilus is a rare, acquired, and often large cutaneous lesion consisting of a light brown background macule containing varying numbers of small darker macular or papular areas. Objective: Nevus spilus may contain dysplastic melanocytic elements, and there are also reports of melanoma arising from nevus spilus. However, the absolute risk for malignant transformation is not well defined. Conclusion: We discuss a case of synchronous melanomas arising from a nevus spilus and potential management recommendations based on a review of the pertinent literature.

scholarly journals Presence of Leishmania sp. and Dirofilaria immitis in Cutaneous Canine Transmissible Venereal Tumor

2019 ◽  
Vol 47 ◽  
Author(s):  
Ramon Tadeu Galvão Alves Rodrigues ◽  
Olivia Maria Moreira Borges ◽  
Alinne Káttia Fernandes Pereira Dantas ◽  
Leonardo Mendes Tôrres ◽  
Rossandra Dos Santos Lucena ◽  
...  
Keyword(s):  
Dirofilaria Immitis ◽  
Troponin I ◽  
Cutaneous Lesion ◽  
Geographical Area ◽  
Systemic Infection ◽  
Normocytic Anemia ◽  
Sinus Arrhythmia ◽  
Tumoral Lesion ◽  
The Right ◽  
Electrocardiogram Ecg

Background: Canine Transmissible Venereal Tumor (CTVT) is a neoplasm transmitted by implantation of its cells into genital and extragenital organs, while Heartworm and Visceral Leishmaniasis are zoonosis transmitted by hematophagous insects that are often underdiagnosed in asymptomatic animals. Coinfection by the agents of these parasitosis is well documented, however, the association of both diseases with the CTVT is still unusual. Thus, it was aimed to report a case of incidental identification of microfilariae of D. immitis and amastigotes forms of Leishmania sp. in cutaneous CTVT by cytology in an asymptomatic dog for the parasitosis.Case: A 6-year-old, male, mongrel, sexually intact dog from the city of Patos, Paraiba, Brazil, was presented with a cutaneous circumscribed tumoral lesion in a region adjacent to the right olecranon, with an ulcerated surface of reddish color, having areas of necrosis inside and larvae (myiasis), draining bloody secretion. The material was collected for cytological analysis, which proved to be Canine Transmissible Venereal Tumor (CTVT) with the presence of amastigote forms of Leishmania sp. and microfilariae of D. immitis among neoplastic cells. Blood count, serum urea, creatinine and albumin, ALT, AST, FA, CK, Na+, K+, Ca++, CK-MB, Troponin I (cTnI), Snap 4Dx Plus (Idexx®), Snap Leishmania (Idexx®), and Knott's test were performed, plus chest radiography, blood pressure measurements and electrocardiogram (ECG). The alterations found corresponded to normochromic normocytic anemia, thrombocytopenia, hypoalbuminemia, microfilariae in the Knott test, increase of CK, CK-MB and cTnI, positivity for Erlichia sp., Anaplasma sp., Leishmania sp. and Dirofilaria immitis. Furthermore cardiomegaly on radiographs and sinus arrhythmia associated with atrioventricular block (AVB) of the first degree on the ECG. Euthanasia was performed after necropsy, in which adult worms were observed in the right heart chambers.Discussion: The coexistence of neoplastic diseases and infectious microorganisms is often detected only incidentally in asymptomatic animals and complementary tests are important tools to support clinical suspicions, as was observed in the present case. The fact that the animal is not neutered, be in full sexual activity and have unrestricted life habit, favored his involvement by CTVT due to greater contact with other whole canines. Coinfection by Dirofilaria sp. and Leishmania sp., identified in this case, has already been confirmed in several countries, suggesting the presence of distinct vectors in the same geographical area and the imminent exposure of humans to these agents. Despite the studies evidencing the systemic infection by the two parasites, there are no reports of mutual parasitism by the pathogens mentioned in canine neoplasms, especially in the cutaneous extragenital form of the CTVT, making the present case uncommon. The cytological examination was fundamental not only to show that the cutaneous lesion was a CTVT, but also to have evidenced the parasites Leishmania sp. and Dirofilaria immitis, whose infections remained hidden. The changes present in hematology are commonly present in the diseases diagnosed in this case, and elevation of CK, CK-MB and cTnI denote damage to cardiomyocytes due to the action of both parasites. Cardiomegaly on radiographs and 1st degree AVB on the ECG also correspond to secondary changes in the presence of worms in the animal's cardiovascular system. Thus, the presence of a dog autochthonously infected by parasites with a zoonotic potential reveals the susceptibility of other animals and humans in the region to infections.

scholarly journals Dermatological Manifestations in the Intensive Care Unit: A Practical Approach

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Mariona Badia ◽  
José Manuel Casanova ◽  
Lluís Serviá ◽  
Neus Montserrat ◽  
Jordi Codina ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Cutaneous Lesion ◽  
Skin Lesions ◽  
Intensive Treatment ◽  
Main Diagnosis ◽  
Systemic Diseases ◽  
Cutaneous Manifestations ◽  
Critical Patients ◽  
The Moment

Dermatological problems are not usually related to intensive medicine because they are considered to have a low impact on the evolution of critical patients. Despite this, dermatological manifestations (DMs) are relatively frequent in critically ill patients. In rare cases, DMs will be the main diagnosis and will require intensive treatment due to acute skin failure. In contrast, DMs can be a reflection of underlying systemic diseases, and their identification may be key to their diagnosis. On other occasions, DMs are lesions that appear in the evolution of critical patients and are due to factors derived from the stay or intensive treatment. Lastly, DMs can accompany patients and must be taken into account in the comprehensive pathology management. Several factors must be considered when addressing DMs: on the one hand, the moment of appearance, morphology, location, and associated treatment and, on the other hand, aetiopathogenesis and classification of the cutaneous lesion. DMs can be classified into 4 groups: life-threatening DMs (uncommon but compromise the patient's life); DMs associated with systemic diseases where skin lesions accompany the pathology that requires admission to the intensive care unit (ICU); DMs secondary to the management of the critical patient that considers the cutaneous manifestations that appear in the evolution mainly of infectious or allergic origin; and DMs previously present in the patient and unrelated to the critical process. This review provides a characterization of DMs in ICU patients to establish a better identification and classification and to understand their interrelation with critical illnesses.

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