Extraskeletal Chondroma of Anterior Abdominal Wall in a Child

A 7-year-old boy presented with a slightly raised, painless swelling on left lower quadrant of anterior abdominal wall. The swelling was slowly growing for 10 months. There was no history of preceding trauma and no relevant past medical and surgical history. General physical and systemic examination did not reveal any significant findings. On local examination, there was a non-tender, firm to hard nodular swelling of 2.0 cm x 1.5 cm in size over the anterior abdominal wall, free from overlying skin and underlying muscles. There were no other subcutaneous masses. His routine laboratory investigations were within reference range. The mass was excised and sent for histopathological examination. Grossly, the cut surface was firm, blue-white and glistening. Hematoxylin and eosin stained sections showed confluent lobules of hyaline cartilage with variable cellularity comprising of mature chondrocytes embedded in chondrocytic lacunae (Fig. 1, 2). There was no significant cytologic atypia, mitosis, or necrosis. No calcification/ ossification were present throughout the mass. Final diagnosis of extraskeletal chondroma (ESC) was made.