Alex Ortega Loayza

Assistant Professor

  • 494 Citations
  • 13 h-Index
20062019
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Research Output 2006 2019

1 Citation (Scopus)

A Comprehensive Review of Local Pharmacologic Therapy for Pyoderma Gangrenosum

Baltazar, D., Haag, C., Gupta, A. S., Marzano, A. M. & Ortega Loayza, A., Jun 1 2019, In : Wounds : a compendium of clinical research and practice. 31, 6, p. 151-157 7 p.

Research output: Contribution to journalArticle

Pyoderma Gangrenosum
Therapeutics
Hematologic Diseases
Proxy
Inflammatory Bowel Diseases
20 Citations (Scopus)

Acute generalized exanthematous pustulosis: Atypical presentations and outcomes

Kostopoulos, T. C., Krishna, S. M., Brinster, N. K. & Ortega Loayza, A., Jan 1 2015, In : Journal of the European Academy of Dermatology and Venereology. 29, 2, p. 209-214 6 p.

Research output: Contribution to journalReview article

Acute Generalized Exanthematous Pustulosis
Drug Hypersensitivity Syndrome
Drug Eruptions
Stevens-Johnson Syndrome
Therapeutics
4 Citations (Scopus)

Amlodipine-induced subacute cutaneous lupus

Ortega Loayza, A., McCall, C. O., Cooke, R. H. & Jovin, I. S., Mar 1 2013, In : North American Journal of Medical Sciences. 5, 3, p. 246-247 2 p.

Research output: Contribution to journalLetter

Amlodipine
Skin
17 Citations (Scopus)

Antibodies against desmoglein 1 in healthy subjects in endemic and nonendemic areas of pemphigus foliaceus (fogo selvagem) in Peru

Ortega Loayza, A., Ramos, W., Elgart, G., Bouman, P., Jiménez, G., Avila, J., Rojas, I., Vilcarromero, M., Hurtado, J., Lindo, G. & Galarza, C., May 1 2006, In : International Journal of Dermatology. 45, 5, p. 538-542 5 p.

Research output: Contribution to journalArticle

Desmoglein 1
Peru
Pemphigus
Healthy Volunteers
Antibodies

Antidesmoglein 1 and 3 antibodies in healthy subjects of a population in the Peruvian high amazon

Ramos, W., Díaz, J., Gutierrez, E. L., Lazarte, J. S., Bohnett, M. C., Ronceros, G. & Ortega Loayza, A., Mar 1 2018, In : International Journal of Dermatology. 57, 3, p. 344-348 5 p.

Research output: Contribution to journalArticle

Anti-Idiotypic Antibodies
Healthy Volunteers
Enzyme-Linked Immunosorbent Assay
Antibodies
Immunoglobulin G

Aortic endograft and epithelioid sarcoma: A random association or causality?

Tiwari, N., Krishna, S. & Ortega Loayza, A., Jul 1 2016, In : Journal of Drugs in Dermatology. 15, 7, p. 897-899 3 p.

Research output: Contribution to journalArticle

Hemangiosarcoma
Sarcoma
Causality
Polyethylene Terephthalates
Carcinogens
7 Citations (Scopus)

A rapidly progressive and fatal case of atypical acute generalized exanthematous pustulosis

Krishna, S., Ortega Loayza, A., Malakouti, N. & Brinster, N., Jan 1 2014, In : Journal of the American Academy of Dermatology. 71, 3

Research output: Contribution to journalArticle

Open Access
Acute Generalized Exanthematous Pustulosis
Stevens-Johnson Syndrome
Fatal Outcome
Multiple Organ Failure
Combination Drug Therapy
2 Citations (Scopus)

Asociación entre la hidradenitis supurativa y el síndrome metabólico: Revisión sistemática y metaanálisis

Translated title of the contribution: Association Between Hidradenitis Suppurativa and Metabolic Syndrome: A Systematic Review and Meta-analysisRodríguez-Zuñiga, M. J. M., García-Perdomo, H. A. & Ortega Loayza, A., May 1 2019, In : Actas Dermo-Sifiliograficas. 110, 4, p. 279-288 10 p.

Research output: Contribution to journalArticle

Hidradenitis Suppurativa
Meta-Analysis
Odds Ratio
Tertiary Healthcare
Dermatology
14 Citations (Scopus)

Aspirin desensitization/challenge in 3 patients with unstable angina

Ortega Loayza, A., Raza, S., Minisi, A. J., Topaz, O., Heller, A. & Jovin, I. S., Jan 1 2010, In : American Journal of the Medical Sciences. 340, 5, p. 418-420 3 p.

Research output: Contribution to journalArticle

Unstable Angina
Aspirin
Percutaneous Coronary Intervention
Therapeutics
4 Citations (Scopus)
Pyoderma Gangrenosum
Lung
2 Citations (Scopus)

Biologic and small-molecule medications in the management of pyoderma gangrenosum

McKenzie, F., Cash, D., Gupta, A., Cummings, L. W. & Ortega Loayza, A., Jan 1 2018, (Accepted/In press) In : Journal of Dermatological Treatment.

Research output: Contribution to journalArticle

Pyoderma Gangrenosum
Therapeutics
Skin
Clinical Pharmacology
Immunosuppressive Agents
6 Citations (Scopus)

Blastomicose cutânea: Um sinal de doença sistêmica

Translated title of the contribution: Cutaneous blastomycosis: A clue to a systemic diseaseOrtega Loayza, A. & Nguyen, T., Jan 1 2013, In : Anais Brasileiros de Dermatologia. 88, 2, p. 287-289 3 p.

Research output: Contribution to journalArticle

Open Access
Blastomycosis
Skin
Spontaneous Fractures
Saccharomycetales
Itraconazole
2 Citations (Scopus)

Calciphylaxis with evidence of hypercoagulability successfully treated with unfractionated heparin: A multidisciplinary approach

Carter, A., Ortega Loayza, A., Barrett, J. & Nunley, J. R., Apr 1 2016, In : Clinical and Experimental Dermatology. 41, 3, p. 275-278 4 p.

Research output: Contribution to journalArticle

Calciphylaxis
Thrombophilia
Heparin
Skin
Hyperparathyroidism

Carcinoma Erysipeloides From Metastatic Cutaneous Squamous Cell Carcinoma Initially Mistaken for Intralymphatic Histiocytosis

Heath, M. S., Slaught, C., Ortega Loayza, A. & Mengden, S., Jul 1 2019, In : The American Journal of dermatopathology. 41, 7, p. 522-525 4 p.

Research output: Contribution to journalArticle

Histiocytosis
Squamous Cell Carcinoma
Carcinoma
Skin
Lymphatic Metastasis
2 Citations (Scopus)

Case report/focused review: Multivessel acute myocardial infarction: Case report and review of the literature

Ortega Loayza, A. & Stouffer, G. A., Jan 1 2008, In : American Journal of the Medical Sciences. 335, 5, p. 375-378 4 p.

Research output: Contribution to journalArticle

Myocardial Infarction
Coronary Vessels
Thrombosis
Arteries
Coronary Vasospasm

Characterisation and diagnosis of ulcers in inpatient dermatology consultation services: A multi-centre study

Haynes, D., Hammer, P., Malachowski, S. J., Kaffenberger, B., Yi, J. S., Vera, N., Calhoun, C., Shinohara, M. M., Seminario-Vidal, L., Trinidad, J. C., Keller, J. J. & Ortega Loayza, A., Jan 1 2019, (Accepted/In press) In : International Wound Journal.

Research output: Contribution to journalArticle

Skin Ulcer
Dermatology
Ulcer
Inpatients
Referral and Consultation
13 Citations (Scopus)

Characterization of Staphylococcus aureus cutaneous infections in a pediatric dermatology tertiary health care outpatient facility

Ortega Loayza, A., Diamantis, S. A., Gilligan, P. & Morrell, D. S., May 1 2010, In : Journal of the American Academy of Dermatology. 62, 5, p. 804-811 8 p.

Research output: Contribution to journalArticle

Tertiary Healthcare
Dermatology
Staphylococcus aureus
Methicillin Resistance
Outpatients
1 Citation (Scopus)
Pyoderma Gangrenosum
Intravenous Immunoglobulins
Ulcer
Therapeutics
PubMed
6 Citations (Scopus)

Clinical Features of Neutrophilic Dermatosis Variants Resembling Necrotizing Fasciitis

Sanchez, I. M., Lowenstein, S., Johnson, K. A., Babik, J., Haag, C., Keller, J. J., Ortega Loayza, A., Cohen, J., McCalmont, T. H., Demer, A. M., Mansh, M. D., Hylwa, S. A., Liu, J. & Shinkai, K., Jan 1 2019, In : JAMA Dermatology. 155, 1, p. 79-84 6 p.

Research output: Contribution to journalArticle

Necrotizing Fasciitis
Skin Diseases
Sweet Syndrome
Pyoderma Gangrenosum
Diagnostic Errors
12 Citations (Scopus)

Crusted scabies and multiple dosages of ivermectin

Ortega Loayza, A., McCall, C. O. & Nunley, J. R., May 1 2013, In : Journal of Drugs in Dermatology. 12, 5, p. 584-585 2 p.

Research output: Contribution to journalArticle

Scabies
Ivermectin
Permethrin
Centers for Disease Control and Prevention (U.S.)
Bone Marrow
17 Citations (Scopus)

Cutaneous acanthamebiasis infection in immunocompetent and immunocompromised patients

Galarza, C., Ramos, W., Gutierrez, E. L., Ronceros, G., Teran, M., Uribe, M., Ñavincopa, M. & Ortega Loayza, A., Jan 1 2009, In : International Journal of Dermatology. 48, 12, p. 1324-1329 6 p.

Research output: Contribution to journalArticle

Open Access
Immunocompromised Host
Skin
Acanthamoeba
Infection
Peru

Cutaneous arsenicism in Latin America: A public health problem

Ramos, W., De Amat, F., Galarza, C. & Ortega Loayza, A., Jan 1 2010, Environmental Health Risks: Lead Poisoning and Arsenic Exposure. Nova Science Publishers, Inc., p. 167-176 10 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

Latin America
Public Health
Skin
2 Citations (Scopus)

Cutaneous blastomycosis

Ortega Loayza, A. & McCall, C. O., Mar 7 2013, In : New England Journal of Medicine. 368, 10

Research output: Contribution to journalArticle

Blastomycosis
Skin
5 Citations (Scopus)

Cutaneous Lupus: A Brief Review of Old and New Medical Therapeutic Options

Nutan, F. & Ortega Loayza, A., Oct 1 2017, In : Journal of Investigative Dermatology Symposium Proceedings. 18, 2, p. S64-S68

Research output: Contribution to journalReview article

Open Access
Cutaneous Lupus Erythematosus
Discoid Lupus Erythematosus
Skin Manifestations
Skin
Systemic Lupus Erythematosus
15 Citations (Scopus)

Cutaneous manifestations of internal malignancies in a tertiary health care hospital of a developing country

Ortega Loayza, A., Ramos, W., Gutierrez, E. L., De Paz, P. C., Bobbio, L. & Galarza, C., Sep 1 2010, In : Anais Brasileiros de Dermatologia. 85, 5, p. 736-742 7 p.

Research output: Contribution to journalArticle

Skin Manifestations
Tertiary Healthcare
Skin Diseases
Developing Countries
Delivery of Health Care

Dapsone and Autoimmune Bullous Disorders

Werth, V. P. & Ortega Loayza, A., Jan 1 2015, Blistering Diseases: Clinical Features, Pathogenesis, Treatment. Springer Berlin Heidelberg, p. 493-499 7 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

Dapsone
Skin Diseases
Conjunctivitis
Cicatrix
Trichiasis
10 Citations (Scopus)

Development and Validation of a Risk Prediction Model for In-Hospital Mortality among Patients with Stevens-Johnson Syndrome/Toxic Epidermal Necrolysis - ABCD-10

Noe, M. H., Rosenbach, M., Hubbard, R. A., Mostaghimi, A., Cardones, A. R., Chen, J. K., Cotliar, J., Davis, M. D. P., Dominguez, A., Fox, L. P., Hughey, L. C., Kaffenberger, B. H., Kroshinsky, D., Kwong, B. Y., Miller, D. D., Musiek, A., Ortega Loayza, A., Sharon, V. R., Shinkai, K., Summers, E. M. & 6 others, Wanat, K. A., Wetter, D. A., Worswick, S., Margolis, D. J., Gelfand, J. M. & Micheletti, R. G., Apr 1 2019, In : JAMA Dermatology. 155, 4, p. 448-454 7 p.

Research output: Contribution to journalArticle

Stevens-Johnson Syndrome
Bicarbonates
Hospital Mortality
Dialysis
Neoplasms
8 Citations (Scopus)

Diagnosis and management of peristomal pyoderma gangrenosum: A systematic review

Afifi, L., Sanchez, I. M., Wallace, M. M., Braswell, S. F., Ortega Loayza, A. & Shinkai, K., Jun 1 2018, In : Journal of the American Academy of Dermatology. 78, 6, p. 1195-1204.e1

Research output: Contribution to journalReview article

Pyoderma Gangrenosum
Ostomy
Inflammatory Bowel Diseases
Therapeutics
Guidelines
6 Citations (Scopus)

Diversity in dermatology: Roadmap for improvement

Pritchett, E. N., Pandya, A. G., Ferguson, N. N., Hu, S., Ortega Loayza, A. & Lim, H. W., Aug 1 2018, In : Journal of the American Academy of Dermatology. 79, 2, p. 337-341 5 p.

Research output: Contribution to journalArticle

Dermatology
Medicine
Students
Internship and Residency
Medical Schools

Do i Have Calciphylaxis?

Keller, J. J. & Ortega Loayza, A., Jan 1 2019, In : JAMA Dermatology.

Research output: Contribution to journalComment/debate

Calciphylaxis
18 Citations (Scopus)

Drug-induced pyoderma gangrenosum: a model to understand the pathogenesis of pyoderma gangrenosum

Wu, B. C., Patel, E. D. & Ortega Loayza, A., Jul 1 2017, In : British Journal of Dermatology. 177, 1, p. 72-83 12 p.

Research output: Contribution to journalReview article

Pyoderma Gangrenosum
Pharmaceutical Preparations
Keratinocytes
Epigenomics
Neutrophils
8 Citations (Scopus)

Dysregulation of inflammatory gene expression in lesional and nonlesional skin of patients with pyoderma gangrenosum

Ortega Loayza, A., Nugent, W. H., Lucero, O. M., Washington, S. L., Nunley, J. R. & Walsh, S. W., Jan 1 2018, In : British Journal of Dermatology. 178, 1, p. e35-e36

Research output: Contribution to journalLetter

Open Access
Pyoderma Gangrenosum
Gene Expression
Skin
8 Citations (Scopus)

Endemic pemphigus foliaceus in the Peruvian Amazon

Ortega Loayza, A., Ramos, W., Gutierrez, E. L., Jimenez, G., Rojas, I. & Galarza, C., Aug 1 2013, In : Clinical and Experimental Dermatology. 38, 6, p. 594-600 7 p.

Research output: Contribution to journalArticle

Immunoglobulin G
Autoantibodies
Peru
Indirect Fluorescent Antibody Technique
Anti-Idiotypic Antibodies
23 Citations (Scopus)

Endemic pemphigus vulgaris

Rocha-Alvarez, R., Ortega Loayza, A., Friedman, H., Campbell, I., Aoki, V., Rivitti, E. A., Dasher, D., Li, N. & Diaz, L. A., Jul 1 2007, In : Archives of Dermatology. 143, 7, p. 895-899 5 p.

Research output: Contribution to journalArticle

Open Access
Pemphigus
Immunoprecipitation
Enzyme-Linked Immunosorbent Assay
Autoantibodies
Brazil
19 Citations (Scopus)

Eosinophilic fasciitis in a female child

Ortega Loayza, A., Merritt, B. G., Groben, P. A. & Morrell, D. S., May 1 2008, In : Journal of the American Academy of Dermatology. 58, 5 SUPPL. 1

Research output: Contribution to journalArticle

Fasciitis
Eosinophilia
Methotrexate
Steroids
Pediatrics
2 Citations (Scopus)

Extracutaneous involvement of pyoderma gangrenosum

Borda, L. J., Wong, L. L., Marzano, A. V. & Ortega Loayza, A., Jan 1 2019, In : Archives of Dermatological Research.

Research output: Contribution to journalReview article

Pyoderma Gangrenosum
Skin Diseases
Polyarteritis Nodosa
Granulomatosis with Polyangiitis
Antiphospholipid Syndrome
12 Citations (Scopus)

Facial porokeratosis: A series of six patients

Gutierrez, E. L., Galarza, C., Ramos, W., Tello, M., De Paz, P. C., Bobbio, L., Barquinero, A., Ronceros, G. & Ortega Loayza, A., Aug 1 2010, In : Australasian Journal of Dermatology. 51, 3, p. 191-194 4 p.

Research output: Contribution to journalArticle

Porokeratosis
Isotretinoin
Peru
3 Citations (Scopus)

Gestante con pénfigo foliáceo endémico y producto libre de enfermedad. Caso clínico

Translated title of the contribution: Endemic pemphigus foliaceus in a pregnant woman. Report of one caseGalarza, C., Gutiérrez, E. L., Ramos, W., Tello, M., Ronceros, G., Alvizuri, S., Valverde, F. & Ortega Loayza, A., Nov 26 2009, In : Revista Medica de Chile. 137, 9, p. 1205-1208 4 p.

Research output: Contribution to journalArticle

Pregnant Women
Immunoglobulin G
Mothers
Newborn Infant
Indirect Fluorescent Antibody Technique
3 Citations (Scopus)

Historical notes on endemic pemphigus in South America

Chacón, G. R., Ortega Loayza, A. & Cyr, R. M., Apr 1 2012, In : International Journal of Dermatology. 51, 4, p. 477-481 5 p.

Research output: Contribution to journalArticle

21st Century History
18th Century History
19th Century History
20th Century History
Endemic Diseases

Incidental skin malignancies in teledermatology and in-person cohorts in the Veterans Affairs Health System

Keleshian, V., Ortega Loayza, A. & Tarkington, P., Nov 1 2017, In : Journal of the American Academy of Dermatology. 77, 5, p. 965-966 2 p.

Research output: Contribution to journalArticle

Telepathology
Veterans Health
United States Department of Veterans Affairs
Incidental Findings
Skin Neoplasms
14 Citations (Scopus)

Influence of climatic factors on the medical attentions of dermatologic diseases in a hospital of Lima, Peru

Gutierrez, E. L., Ramos, W., Smith, M. E., Galarza, C., Mendoza, M. & Ortega Loayza, A., Jul 1 2010, In : Anais Brasileiros de Dermatologia. 85, 4, p. 461-468 8 p.

Research output: Contribution to journalArticle

Peru
Warts
Rosacea
Actinic Keratosis
International Classification of Diseases
3 Citations (Scopus)

Insights Into the Pathogenesis of Sweet's Syndrome

Heath, M. S. & Ortega Loayza, A., Jan 1 2019, In : Frontiers in immunology. 10, 1 p.

Research output: Contribution to journalReview article

Open Access
Sweet Syndrome
Inflammasomes
Skin
Leukocytosis
Skin Diseases
3 Citations (Scopus)

LPIN2 gene mutation in a patient with overlapping neutrophilic disease (pyoderma gangrenosum and aseptic abscess syndrome)

Marzano, A. V., Ortega Loayza, A., Ceccherini, I. & Cugno, M., Mar 1 2018, In : JAAD Case Reports. 4, 2, p. 120-122 3 p.

Research output: Contribution to journalArticle

Open Access
Pyoderma Gangrenosum
Abscess
Mutation
Genes
2 Citations (Scopus)

Mechanisms of Inflammation in Neutrophil-Mediated Skin Diseases

Marzano, A. V., Ortega Loayza, A., Heath, M., Morse, D., Genovese, G. & Cugno, M., Jan 1 2019, In : Frontiers in immunology. 10, 1 p.

Research output: Contribution to journalReview article

Open Access
Skin Diseases
Neutrophils
Inflammation
Sweet Syndrome
Inflammasomes
3 Citations (Scopus)

Meningoencefalite causada por Cryptococcus gattii em um paciente HIV-negativo procedente dos Andes Peruanos

Translated title of the contribution: Cryptococcus gattii meningoencephalitis in an HIV-negative patient from the Peruvian AndesGutierrez, E. L., Valqui, W., Vilchez, L., Evangelista, L., Crispin, S., Tello, M., Ñavincopa, M., Béjar, V., Gonzáles, J. & Ortega Loayza, A., Jan 1 2010, In : Revista da Sociedade Brasileira de Medicina Tropical. 43, 4, p. 469-471 3 p.

Research output: Contribution to journalArticle

Open Access
Cryptococcus gattii
Meningoencephalitis
HIV
Peru
Fluconazole
12 Citations (Scopus)

Microarray technique, analysis, and applications in dermatology

Villaseñor-Park, J. & Ortega Loayza, A., Apr 1 2013, In : Journal of Investigative Dermatology. 133, 4

Research output: Contribution to journalArticle

Open Access
Dermatology
Microarrays
5 Citations (Scopus)

Miliária 'rash' após neutropenia febril e quimioterapia de indução para a leucemia mielóide aguda

Translated title of the contribution: Miliaria-rash after neutropenic fever and induction chemotherapy for acute myelogenous leukemiaNguyen, T. A., Ortega Loayza, A. & Stevens, M. P., Jul 1 2011, In : Anais Brasileiros de Dermatologia. 86, 4 SUPPL. 1, p. 104-106 3 p.

Research output: Contribution to journalArticle

Miliaria
Induction Chemotherapy
Exanthema
Acute Myeloid Leukemia
Fever

Molecular basis for selected inherited skin disorders

Krishna, S. M., Sprigle, A. & Ortega Loayza, A., Nov 1 2012, In : Journal of Drugs in Dermatology. 11, 11, p. 1361-1363 3 p.

Research output: Contribution to journalArticle

Skin
7 Citations (Scopus)

Molecular characterization and antifungal susceptibility of Cryptococcus neoformans strains collected from a single institution in Lima, Peru

Bejar, V., Tello, M., García, R., Guevara, J. M., Gonzales, S., Vergaray, G., Valencia, E., Abanto, E., Ortega Loayza, A., Hagen, F. & Gutierrez, E. L., Apr 1 2015, In : Revista Iberoamericana de Micologia. 32, 2, p. 88-92 5 p.

Research output: Contribution to journalArticle

Cryptococcus neoformans
Peru
Genotype
Cryptococcus gattii
Tropical Medicine
2 Citations (Scopus)

Necrolytic acral erythema

Grauel, E., Stechschulte, S., Ortega Loayza, A., Krishna, S. M. & Nunley, J. R., Nov 1 2012, In : Journal of Drugs in Dermatology. 11, 11, p. 1370-1371 2 p.

Research output: Contribution to journalArticle

Foot Dermatoses
Hand Dermatoses
Zinc Sulfate
Chronic Hepatitis C
Erythema