Nevus azul celular parotídeo, una tumoración inusual / Parotid cellular blue nevi, an unusual mass

Introducción: el nevus azul celular es una tumoración melanocítica dérmica benigna. En ocasiones, puede ser falsamente diagnosticada como lesiones malignas, entre ellas, el melanoma. Caso clínico: se trata de una mujer de 37 años que presentó una masa parotídea izquierda de cuatro meses de evolución correspondiente con un nevus azul celular. Discusión: la región de la cabeza y cuello es la tercera en frecuencia, tras la sacrococcígea y las extremidades. Ante una tumoración melanocítica, es importante la confirmación diagnóstica, debido a las similitudes, tanto clínicas como anatomopatológicas, del nevus azul celular con el melanoma maligno. Conclusiones: es muy importante el diagnóstico diferencial correcto, para lo cual es de ayuda el uso de las tinciones inmunohistoquímicas. El tratamiento de esta tumoración es la exéresis quirúrgica con márgenes, esto presenta un comportamiento benigno y baja tasa de recidiva.

Introduction: Cellular blue nevi is a benign dermal melanocytic tumor. Occasionally, it can be falsely diagnosed as malignant lesions, including melanoma. Clinical case: This is a 37-year-old woman who presented with a left parotid mass of four months of evolution, corresponding with a cellular blue nevi. Discussion: The region of the head and neck is the third in frequency, after the sacrococcygeal and the extremities. During the study of a melanocytic tumor, diagnostic confirmation with a biopsy is important, due to the similarities, both clinical and pathological, of cellular blue nevi with malignant melanoma. Conclusions: the correct differential diagnosis is very important, for which immunohistochemical study is helpful. The treatment of this tumor is the surgical excision with margins, presenting benign behaviour and low recurrence rate.

Comparative dermatology: blue nevus / Dermatologia comparativa: nevo azul

There are elements in nature that may be compared to some dermatological lesions, such as the black pearl, which is very similar to a cellular blue nevus observed in the gluteus region of a 31-year-old male patient.

A natureza pode oferecer elementos passíveis de comparação com algumas lesões dermatológicas, como a semelhança entre a pérola negra e o nevo azul celular observado na região glútea de paciente do sexo masculino, 31 anos.

Extenso nevo azul intraoral: relato de caso / Extensive intraoral blue nevus: case report

O nevo é uma má-formação congênita pigmentada, raramente encontrado na mucosa bucal. Cerca de 1/3 dos casos localizados nesta região anatômica são do tipo azul, uma variante histológica com considerável tendência à malignização. Este artigo relata o caso de um paciente do sexo masculino, tabagista crônico, portador de um nevo azul de 5 cm de diâmetro no palato duro. A excisão da lesão sem biópsia prévia foi a conduta terapêutica de eleição para o caso, uma vez que ainda existe controvérsia na literatura a respeito da realização de biópsia incisional em lesões pigmentadas malignas ou com potencial de malignização. O paciente foi acompanhado por um período de 2 anos, sem sinais de recorrência ou transformação maligna.

Nevus is a congenital pigmented malformation rarely found in the oral mucosa. Around one third of cases located in this anatomical region are of the blue type, a histological variant with considerable tendency to malignancy. This study reports the case of a male patient, chronic smoker, with a blue nevus measuring 5cm in diameter on the hard palate. Since controversy exists in the literature regarding the incisional biopsy of pigmented lesions with malignant or malignant potential, excision without previous biopsy of the lesion was the therapy of choice for this case. The patient was followed-up for two years with no sign of recurrence or malignant transformation.

Blue rubber bleb nevus syndrome: case report

The case of a patient with blue rubber bleb nevus syndrome who is infected by acquired immunodeficiency syndrome virus due to multiple blood transfusions is presented. This case shows that although it is a rare systemic disorder, blue rubber bleb nevus syndrome has to be considered in the differential diagnosis of chronic anemia or gastrointestinal bleeding. Patients should be investigated by endoscopy, which is the most reliable method for detecting these lesions. The patient underwent gastroscopy and enteroscopy via enterotomy with identification of all lesions. Minimal resection of the larger lesions and string-purse suture of the smaller ones involving all the layers of the intestine were performed. The string-purse suture of the lesions detected by enteroscopy proved to be an effective technique for handling these lesions, avoiding extensive intestinal resection and stopping the bleeding. Effective management of these patients demands aggressive treatment and should be initiated as soon as possible to avoid risks involved in blood transfusions, as occurred in this case

Nevo azul combinado gigante: relato de caso / Combined ble nevus: a case report

Relato de caso de nevo azul do tipo combinado em paciente de 47 anos de idade, do sexo feminino, que apresentava grande massa tumoral localizada na regiäo occipital. A designaçäo nevo azul combinado reporta-se a raros casos que apresentam superposiçäo de aspectos microscópicos de nevo azul e nevo melanocítico