Purpose or Case Report: Lumps and bumps in the pediatric hands and feet are frequently encountered in pediatric imaging. While certain lesions demonstrate characteristic imaging features that allow for confident diagnosis, others present with nonspecific findings and require tissue sampling for definitive diagnosis. After reviewing this case and imaging-based discussion of benign and malignant lesions in the pediatric hands and feet, viewers will be able to:
1. Identify common benign and malignant bone and soft tissue lesions of the hands and feet in children.
2. Recognize imaging features of aggressive lesions that warrant biopsy.
3. Diagnose characteristic lesions based on their imaging appearance.
Lesions discussed in this exhibit include:
1. Aggressive Bone Lesions: Osteomyelitis, undifferentiated sarcoma.
2. Benign Bone Lesions: Aneurysmal bone cyst, simple bone cyst, giant cell reparative granuloma, giant cell tumor, hemangioma, enchondroma, Trevor’s disease (dysplasia epiphysealis hemimelica), osteoid osteoma, osteoblastoma, abscess.
3. Malignant Soft Tissue Tumors: Infantile fibrosarcoma, rhabdomyosarcoma, synovial sarcoma, other soft tissue sarcomas, including malignant peripheral nerve sheath tumor (MPNST).
4. Benign Soft Tissue Lesions: Ganglion cyst, desmoid tumor, giant cell tumor of tendon sheath, infantile digital fibromatosis, myofibroma, nerve sheath tumor, dermatofibroma, granuloma annulare.
5. Calcified Lesions: Synovial sarcoma, soft tissue chondroma, venous malformation, chondro-osseous lipoma.
6. Vascular Lesions: Arteriovenous malformation (AVM), venous malformation, lymphatic malformation, hemangioma, Kaposiform hemangioendothelioma.
7. Fatty lesions: Lipoma, fibrolipomatous hamartoma of nerve.
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