# Deep Cervical-thoracic Osteolipoma Near the Brachial Plexus – Case Report and Literature Review

## TL;DR

This case report describes a rare benign tumor called osteolipoma near the brachial plexus and discusses its diagnosis and treatment.

## Contribution

The paper presents a unique case of deep cervical-thoracic osteolipoma in proximity to the brachial plexus.

## Key findings

- Osteolipoma is a rare benign tumor that can cause symptoms by compressing nearby structures.
- Imaging and histopathological examination are essential for diagnosis and surgical planning.

## Abstract

Osteolipoma is a rare benign variant of lipoma and constitutes less than 1% of all lipomas, presenting as a well-circumscribed painless mass. It is a tumor known to occur in several regions, usually intraosseous or adjacent to bone tissue, whose pathogenesis is still unclear. Imaging exams are useful in their evaluation and, mainly, in surgical planning, which consists of tumor excision. However, the definitive diagnosis of osteolipoma is made by histopathological examination. Although benign, osteolipomas can compress surrounding structures, leading to important symptomatology, as in this case reported in which it is in contact with the brachial plexus.

O osteolipoma é uma rara variante benigna do lipoma e constitui menos de 1% de todos os lipomas, se apresentando como uma massa indolor bem circunscrita. É um tumor conhecido por ocorrer em várias regiões, comumente intraósseas ou adjacente ao tecido ósseo, cuja patogênese ainda não está clara. Os exames de imagem são úteis em sua avaliação e, principalmente, no planejamento cirúrgico, que consiste na exérese tumoral. Contudo, o diagnóstico definitivo do osteolipoma é realizado pelo exame histopatológico. Apesar de benigno, o osteolipoma pode comprimir estruturas ao seu redor, levando a importante sintomatologia como neste caso relatado em que está em contato com o plexo braquial.