Aggressive Langerhans Cell Histiocytosis (LCH) of Right Temporal Bone

Summary

Langerhans cell histiocytosis (LCH) is a relatively rare disease. This article explores the clinical and pathological features of Langerhans cell histiocytosis, its differential diagnosis, and biological characteristics.

Abstract

Langerhans cell histiocytosis is a relatively rare disease. This article explores the clinicopathological features, differential diagnosis, and biological characteristics of Langerhans cell histiocytosis. A comprehensive analysis was conducted on the clinical data, clinical characteristics, histological observations, immunohistochemical studies, pathological features, treatment, and prognosis of one case of Langerhans cell histiocytosis occurring in the temporal bone, to enhance clinical understanding of this disease. The patient is a 14-year-old boy, initially presenting with a mass in the right temporal region. Upon admission, a complete examination was performed. Both preoperative CT and MRI indicated damage to the right temporal bone. Following complete resection of the lesion during surgery, histological examination revealed extensive infiltration of Langerhans cells accompanied by eosinophilia. Immunohistochemical staining showed positive CD1a and S-100, confirming the diagnosis of Langerhans cell histiocytosis. No signs of recurrence were observed during the 24-month postoperative follow-up, and the prognosis was favorable. Langerhans cell histiocytosis is a rare disease affecting the reticuloendothelial system, mainly characterized by abnormal proliferation of Langerhans cells. Although the histological morphology appears benign, the biological behavior is highly invasive and destructive, often involving multiple organ systems such as bones (e.g., temporal bone), lungs, skin, and lymph nodes. The condition has a high incidence in childhood and requires early diagnosis and intervention.

Introduction

Langerhans Cell Histiocytosis (LCH) is a rare disease characterized by abnormal proliferation of Langerhans cells, a type of histiocytosis^1,2. The disease can involve bone, skin, lymph nodes, and internal organs, with the skull being the most common site of single bone lesions, accounting for approximately 60%-80% of pediatric LCH cases^1,3. The pathogenesis is not fully understood and may be associated with somatic gene mutations (such as BRAF V600E), immune microenvironment abnormalities, or activation of inflammatory factors³. Clinical manifesta....

Protocol

The study was approved by the Ethics Committee of Affiliated Hospital 2 of Nantong University. The patient provided written consent to participate in the study. The reagents and equipment used are listed in the Table of Materials.

1. Preoperative preparation

1. Liver and kidney function, coagulation index, and other relevant indicators were evaluated to exclude surgical contraindications.
2. Magnetic resonance navigation examination was performed, and the data were entered into the navigation system.

2. Surgical preparation

1. The patient was placed in a supine pos....

Results

The intraoperative neoplasm capsule was incomplete, with a soft texture, poor blood supply, and invasive growth. Adhesion to surrounding tissue was noted, with the deep surface adjacent to the dura mater. Destruction of the right temporal bone was observed, with a lesion size of approximately 3 cm (Figure 3A-D). The mass was completely removed (Figure 1C; Figure 2B; .......

Discussion

Langerhans Cell Histiocytosis (LCH): Incidence and clinical features

Langerhans cell histiocytosis (LCH) primarily affects children, with peak incidence occurring between 1-3 years of age. The male-to-female ratio ranges from 1.2:1 to 2:1. The incidence in adults is low. LCH is a rare disease and presents with diverse clinical manifestations.

Origin of LCH

LCH was first named by Lichtenstein in 1953, base.......

Materials

List of materials used in this article

Name	Company	Catalog Number	Comments
artificial dura	Beijing Tianyifu Biomaterials Co., LTD	www.pwmedtech.com
microscope	Carl Zeiss AG	Pandora 900
neuronavigator	Shanghai Fudan Navigation Company	www.fudanns.com