We report CT and MR imaging findings for a case of nasal chondromesenchymal hamartoma occurring in a 19-month-old boy. A nasal chondromesenchymal hamartoma is a rare benign pediatric hamartoma that can simulate malignancy. Although rare, knowledge of this entity is essential to avoid potentially harmful therapies.

Three cases are reported--one endobronchial hamartoma, one endobronchial hamartoma accompanied by a similar intrapulmonary lesion, and one multiple hamartoma. These cases typify the clinical presentation and illustrate some of the difficulties in diagnosis and management. The published cases are reviewed.

1. Cosio BG, Villena V, Echave-Sustaeta J, de Miguel E, Alfaro J, Hernandez L, et al. Endobronchial hamartoma. Chest. 2002;122:202–5. 2. Oishi H, Tabata T, Okada Y, Endo M, Suzuki S, Matsumura Y, et al. Rapidly growing endobronchial hamartoma with bone marrow tissue. Ann Thorac Surg. 2006;81:2287–9. 3. Cosano Povedano A, Munoz Cabrera L, Cosano Povedano FJ, Rubio Sanchez J, Pascual Martinez N, ...

Objectives: Seromucinous hamartoma, first described by Baillie and Batsakis in 1974, is a rare benign glandular proliferation of the sinonasal tract and nasopharynx. Herein, we present a case of seromucinous hamartoma arising in the bilateral nasal cavities. Case report: We present a 43-year-old woman with seromucinous hamartoma of the bilateral nasal cavities who presented with nasal obstructi...