Autosensitization Triggered by Neosporin Use: A Unique Phenomenon.

Interface dermatitis is a type of dermatological insult to the dermo-epidermal skin junction. When this reaction causes secondary dermatosis that occurs distally on the body, it is known as autosensitization or autoeczematization. Here, we present the case of a middle-aged gentleman, with a medical history including human immunodeficiency virus, non-adherent to highly active antiretroviral therapy, initially presenting due to chronic recurring cellulitis on the left lower leg that had become progressively erythematous and tender to palpation. A few days later, he developed an intensely pruritic, papular rash on his face and chest. Following further investigation, he reported using Neosporin ointment on the leg rash prior to admission which had then caused allergic contact dermatitis. Ultimately, the patient was diagnosed with acute interface dermatitis due to Neosporin use, which led to a secondary autosensitization reaction involving his head, neck, and arms. This case illustrates the importance of thorough history taking and clinical suspicion to appropriately diagnose this phenomenon, further demonstrating the temporal association between allergic contact dermatitis and autosensitization.

Síndrome de Gardner-Diamond. Presentación de un caso / Gardner-Diamond syndrome: A case report

RESUMEN El sindrome de Gardner- Diamond conocido también como púrpura psicógena o síndrome de autosensibilización eritrocitaria es muy poco frecuente. Se presenta el caso de un hombre de 50 años, blanco, ingresado en el Servicio de Medicina Interna del Hospital Clínico Quirúrgico Docente "Faustino Pérez Hernández" por síndrome febril agudo, cefalea holocraneana, epistaxis y hemolacria. En el examen físico realizado se notó la salida de lágrimas con sangre, por el ángulo interno de ambos ojos y epistaxis. La inyección intradérmica en la cara dorsal del muslo izquierdo de 0,1 mL de sangre autóloga, no indujo reacción equimótica. La inyección de 0,1 mL de solución salina al 0,9 % como control en el muslo contralateral resultó negativa. Sobre la base del examen clínico y otras pruebas, se concluyó como un Síndrome de Gardner-Diamond. Esta infrecuente enfermedad debe ser considerada en el diagnóstico diferencial de un síndrome purpúrico de etiología no bien precisada, fundamentalmente en pacientes con problemas psiquiátricos (AU).

ABSTRACT The Gardner-Diamond syndrome, also known as psychogenetic purpura or erythrocyte autosensitization syndrome is very few frequent. The case of a white patient aged 50 years is presented. He entered the Service of Internal Medicine of the Teaching Clinic-surgical Hospital "Faustino Pérez Hernández" because of an acute fever syndrome, holocraneal headache, epistaxis and haemolacria. At the physical examination it was stated the flow of tears with blood, through the internal angle of both eyes and epistaxis. The intradermal injection of 0.1 ml of autologous blood in the left thigh dorsal side did not induce an ecchymotic reaction. The injection of 0.1 ml of 0.9 % saline solution as control in the contralateral side was negative. On the basis of the clinical examination and other tests, the authors arrived to the conclusion it is a Gardner-Diamond syndrome. This infrequent disease should be considered in the differential diagnosis of a purpuric syndrome of non-good précised etiology, mainly in patients with psychiatric problems (AU).

Síndrome de Gardner-Diamond. Presentación de un caso / Gardner-Diamond syndrome: A case report

RESUMEN El sindrome de Gardner- Diamond conocido también como púrpura psicógena o síndrome de autosensibilización eritrocitaria es muy poco frecuente. Se presenta el caso de un hombre de 50 años, blanco, ingresado en el Servicio de Medicina Interna del Hospital Clínico Quirúrgico Docente "Faustino Pérez Hernández" por síndrome febril agudo, cefalea holocraneana, epistaxis y hemolacria. En el examen físico realizado se notó la salida de lágrimas con sangre, por el ángulo interno de ambos ojos y epistaxis. La inyección intradérmica en la cara dorsal del muslo izquierdo de 0,1 mL de sangre autóloga, no indujo reacción equimótica. La inyección de 0,1 mL de solución salina al 0,9 % como control en el muslo contralateral resultó negativa. Sobre la base del examen clínico y otras pruebas, se concluyó como un Síndrome de Gardner-Diamond. Esta infrecuente enfermedad debe ser considerada en el diagnóstico diferencial de un síndrome purpúrico de etiología no bien precisada, fundamentalmente en pacientes con problemas psiquiátricos.

ABSTRACT The Gardner-Diamond syndrome, also known as psychogenetic purpura or erythrocyte autosensitization syndrome is very few frequent. The case of a white patient aged 50 years is presented. He entered the Service of Internal Medicine of the Teaching Clinic-surgical Hospital "Faustino Pérez Hernández" because of an acute fever syndrome, holocraneal headache, epistaxis and haemolacria. At the physical examination it was stated the flow of tears with blood, through the internal angle of both eyes and epistaxis. The intradermal injection of 0.1 ml of autologous blood in the left thigh dorsal side did not induce an ecchymotic reaction. The injection of 0.1 ml of 0.9 % saline solution as control in the contralateral side was negative. On the basis of the clinical examination and other tests, the authors arrived to the conclusion it is a Gardner-Diamond syndrome. This infrequent disease should be considered in the differential diagnosis of a purpuric syndrome of non-good précised etiology, mainly in patients with psychiatric problems.

Disseminated Eczema Following Radiotherapy: A Case Report.

BACKGROUND: Radiotherapy-induced acute skin reactions are common and an expected effect of radiotherapy. Eczematous eruptions, however, are rarely reported, with disseminated eczema in particular being infrequently seen and likely underrecognized. OBJECTIVE: We present a unique case of disseminated vesicular eczema following radiotherapy for ductal carcinoma in situ. CONCLUSIONS: The development of a localized vesicular eruption with subsequent dissemination can occur following radiotherapy. The mechanism of autosensitization is poorly understood but likely involves a cell-mediated immune response. Recognition is important to prevent excessive and inappropriate investigation and treatment.