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Intramuscular Paediatric Granular Cell Tumor Presenting as an Axillary Mass: A Case Report

Xiong Yongqiang, Zhou Xiang, Wei Qiang, Zhang Xiaodong and Jia Xinjian

Granular Cell Tumor (GCT) is a tumor with neuroectodermal differentiation, and it has been classified into the peripheral nerve sheath tumor group of 2013 by World Health Organization (WHO) soft tissue tumor classification. It can arise in any part of the body. Paediatric GCTs have been less reported, and deep soft tissue is a rare location. An eight-year six-month boy had an asymptomatic subcutaneous-like solid mass in the axilla. The mass was characterized as a walnut shape, and the focal skin color was normal with normal skin temperature. The left upper limb function was preserved. The postoperative pathology diagnosed as a benign intramuscular GCT at deep latissimus dorsi muscle in the axilla.

Results: It needs to be differentiated from lymphadenectasis, lymphadenectasis, and fibroma. MRI is helpful in making the diagnosis combined with other multiple approaches, such as a physical exam, ultrasound, and enhancecontrast CT. Soft-tissue GCT has the infiltrating pathological feature and tends to be more aggressive than other types of GCTs despite the benign behavior at the first diagnosis.