ABSTRACT
Background: Melanoma is an aggressive cutaneous cancer. Acral lentiginous melanoma is a melanoma subtype arising on palms, soles, and nail-units. The incidence, prevalence and prognosis differ among populations. The link between expression of major histocompatibility complex Class II alleles and melanoma progression is known. However, available studies report variable results regarding the association of melanoma with specific HLA Class II loci. Aims: The aim of the study was to determine HLA Class II allele frequencies in acral lentiginous melanoma patients and healthy Mexican Mestizo individuals. Methods: Eighteen patients with acral lentiginous melanoma and 99 healthy controls were recruited. HLA Class II typing was performed based on the sequence-specific oligonucleotide method. Results: Three alleles were associated with increased susceptibility to develop acral lentiginous melanoma, namely: HLA-DRB1*13:01; pC = 0.02, odds ratio = 6.1, IC95% = 1.4–25.5, HLA-DQA1*01:03; pC = 0.001, odds ratio = 9.3, IC95% = 2.7–31.3 and HLA-DQB1*02:02; pC = 0.01, odds ratio = 3.7, IC95% = 1.4–10.3. Limitations: The small sample size was a major limitation, although it included all acral lentiginous melanoma patients seen at the dermatology department of Dr. Manuel Gea González General Hospital during the study period. Conclusion: HLA-DRB1*13:01, HLA-DQB1*02:02 and HLA-DQA*01:03 alleles are associated with increased susceptibility to develop acral lentiginous melanoma in Mexican Mestizo patients.
ABSTRACT
La eliminación transepidérmica es un mecanismo mediante el cual material extracelular o fibras alteradas de la dermis se eliminan a través de la epidermis. La elastosis perforante es un padecimiento raro caracterizado por eliminación transepidérmica de fibras elásticas alteradas. Clínicamente se manifiesta como pápulas queratósicas del color de la piel, que pueden confluir formando placas de aspecto arciforme o serpiginoso. Predomina en pacientes masculinos y menores de 30 años. Se presenta, hasta nuestro conocimiento, el primer caso de un paciente masculino con colitis ulcerativa crónica inespecífica y colangitis esclerosante asociadas a elastosis perforante.
Transepidermal elimination is a mechanism by which altered dermal extracellular material is discharged through the epidermis. Perforating elastosis is a rare disease characterized by the transepidermal elimination of abnormal elastic fibers. Clinically it manifests as skin-colored keratotic papules that may coalesce and form arcuate or serpiginous plaques. It affects mostly males, predominantly younger than 30-years-old. We present a case of a male patient with inflammatory bowel disease and sclerosing cholangitis associated with perforating elastosis. To our knowledge, this is the first description of inflammatory bowel disease associated with perforating elastosis.
Subject(s)
Humans , Male , Adult , Cholangitis, Sclerosing/complications , Colitis, Ulcerative/complications , Skin DiseasesABSTRACT
El hemangioma capilar lobular (granuloma piógeno) ha sido informado con más frecuencia en piel (88%) que en mucosas (12%). El granuloma gravidarum es un granuloma piógeno que se presenta frecuentemente durante el embarazo a nivel de mucosa oral. Ha sido asociado con la acción de los estrógenos y una respuesta inflamatoria exagerada de las mucosas. En este artículo informamos el primer caso de granuloma gravidarum en piel cabelluda.
Lobular capillary hemangioma (pyogenic granuloma) has been reported more frequently in the skin (88%) than in the mucous membranes (12%). Granuloma gravidarum is a pyogenic granuloma that develops during pregnancy, often in the oral mucosa. Estrogens apparently increase the inflammatory response of mucous membranes. In this article, we describe the first case of a granuloma gravidarum of the scalp.