A Case Series of Four Children with Langerhans Cell Histiocytosis

Langerhans Cell Histiocytosis (LCH) is a rare pediatric disorder characterized by abnormal proliferation of Langerhans cells originating from the bone marrow. This case series highlights four pediatric presentations of LCH, emphasizing its clinical diversity and diagnostic challenges. The cases describe varied manifestations, including bony swellings, skull deformities, scalp lesions and systemic symptoms, which were often misdiagnosed due to non-specific clinical features. Histopathological analysis, including CD1a positivity and immunohistochemistry, played a pivotal role in confirming LCH diagnosis, supported by imaging modalities such as X-rays, CT and MRI. The treatment approach primarily involved systemic chemotherapy, with protocols including vinblastine and prednisolone, following the HISTSOC-LCH-III guidelines. Surgical interventions, such as curettage and biopsy, were also employed for lesion management. Outcomes varied, with most patients showing significant clinical improvement and remission following comprehensive treatment. However, challenges remain, particularly in cases complicated by late-onset neurodegenerative syndromes or loss to follow-up. This case series underscores the importance of considering LCH in differential diagnosis for pediatric head and neck swellings, given its rarity and lack of distinctive clinical features. Timely diagnosis, multidisciplinary intervention and adherence to treatment protocols are crucial for favorable outcomes. Further research is warranted to address unresolved issues, including the management of progressive neurodegenerative complications. This series highlights the need for broader awareness of LCH among clinicians to ensure accurate diagnosis and effective treatment strategies.