Verruciform xanthoma associated with lichen planus

Verruciform xanthoma (VX) is a rare benign lesion of unknown etiology, with a rough or papillary aspect, painless, sessile, well-defined, most lesions do not exceed 2 cm in their largest diameter, the degree of keratinization of the surface influences color, varying white to red, affecting mainly the gingiva and alveolar mucosa, and can also be seen in skin and genital. Herein, we present a report a clinical case of oral verruciform xanthoma in the buccal mucosa associated with the lichen planus lesion, as well as the morphological and immunohistochemical characteristics of the lesion. The clinical diagnostic hypothesis of oral lichen planus of the white reticular lesions on the buccal mucosa and on the tongue was confirmed by histopathology before a subepithelial connective tissue exhibiting intense inflammatory infiltrate in a predominantly lymphocytic band. In contrast, the hypothesis of the verrucous lesion in the left buccal mucosa was leukoplakia, with histopathological evidence showing exophytic and digitiform proliferations with parakeratin plugs between the papillary projections. Subepithelial connective tissue was characterized by macrophages with foamy cytoplasm (xanthoma cells). An immunohistochemical examination was performed, showing positivity for CD68, a macrophage marker, in addition to testing by Schiff's periodic acid (PAS) with diastasis, which was detected the presence of lipids inside these macrophages. The patient is free of recurrences of verruciform xanthoma and is being monitored due to the presence of lesions of oral lichen planus.

Cystadenoma in a pediatric patient: a rare salivary gland neoplasm / Cistadenoma em paciente pediátrico: uma rara neoplasia de glândula salivar

ABSTRACT Salivary gland cystadenoma is a rare benign neoplasm, representing 1.4% of all benign salivary gland tumors. It presents a predilection for the major salivary gland and middle-aged or elderly adults. The present study reports a rare case of cystadenoma in the floor of the mouth a 5-year-old male patient, who was referred to an oral diagnosis center for evaluation of the lesion. After performing an incisional biopsy, microscopic analysis revealed a cystadenoma. The patient's treatment was excision of the lesion and he has been under follow-up for one year with no signs of recurrence.

RESUMEN El cistoadenoma de las glándulas salivales es una neoplasia benigna rara, responsable del 1,4% de todos los tumores benignos de las glándulas salivales. Tiene predilección por la glándula salival mayor y los adultos de mediana edad o ancianos. El presente estudio reporta un caso raro de cistoadenoma en piso de la cavidad oral de un paciente masculino de 5 años, quien fue derivado a un centro de diagnóstico oral para evaluación de la lesión. Después de realizar una biopsia incisional, el análisis microscópico reveló un cistoadenoma. El paciente fue tratado con la escisión de la lesión y ha sido seguido durante un año sin signos de recidiva.

RESUMO O cistadenoma de glândula salivar é uma neoplasia benigna rara; representa 1,4% de todos os tumores benignos de glândula salivar. Apresenta predileção pela glândula salivar maior e por adultos de meia idade ou idosos. O presente estudo relata um caso raro de cistadenoma em assoalho bucal de um paciente do sexo masculino, 5 anos de idade, que foi encaminhado a um centro de diagnóstico oral para avaliação da lesão. Após realização de biópsia incisional, a análise microscópica revelou um cistadenoma. O tratamento do paciente foi a excisão da lesão, e ele se encontra em acompanhamento há um ano sem sinais de recidiva.

Parotid follicular lymphoid hyperplasia - a rare entity: the challenges in differential diagnosis / Hiperplasia linfoide folicular em parótida - uma rara entidade: os desafios no diagnóstico diferencial

ABSTRACT A 61-year-old female patient presented a nodular lesion located in the right buccal mucosa with a 3-month evolution. Clinical hypotheses of salivary duct cyst and mucocele were proposed, and the patient underwent excisional biopsy. Microscopically, a well-circumscribed and encapsulated lymphoid aggregate fragment was observed, characterized by layers of well-differentiated small lymphocytes and collections of reactive lymphoblasts. These findings, associated with immunohistochemistry, established the diagnosis of follicular lymphoid hyperplasia. Currently, the patient is well, under follow-up after six months.

RESUMEN Paciente del sexo femenino de 61 años de edad exhibió lesión nodular localizada en mucosa yugal derecha con tiempo de evolución de tres meses. Se establecieron las hipótesis clínicas de quiste del ducto salival y mucocele, y la paciente se sometió a una biopsia excisional. Microscópicamente, se observó un fragmento de agregado linfoide bien circunscrito y encapsulado, caracterizado por capas de linfocitos pequeños bien diferenciados y colecciones de linfoblastos reactivos. Esos hallazgos, asociados al estudio inmunohistoquímico, basaron el diagnóstico de hiperplasia folicular linfoide. Al presente, la paciente se encuentra bien, bajo seguimiento seis meses después.

RESUMO Paciente do sexo feminino, 61 anos de idade, exibiu lesão nodular localizada em mucosa jugal direita com evolução há três meses. As hipóteses clínicas de cisto do ducto salivar e mucocele foram estabelecidas, e a paciente foi submetida à biópsia excisional. Microscopicamente, foi observado fragmento de agregado linfoide bem circunscrito e encapsulado, caracterizado por camadas de pequenos linfócitos bem diferenciados e coleções de linfoblastos reativos. Esses achados, associados ao estudo imuno-histoquímico, estabeleceram o diagnóstico de hiperplasia linfoide folicular. Atualmente, a paciente encontra-se bem, sob proservação após seis meses.