Deletion (21)(q21.2q22.12) as a sole clonal cytogenetic abnormality in a lobular capillary hemangioma of the nasal cavity.

A clonal deletion (21)(q21.2q22.12) was detected as a sole cytogenetic abnormality in a lobular capillary hemangioma (pyogenic granuloma) of the nasal cavity. This finding supports a neoplastic, rather than reactive, nature for this lesion. To our knowledge, these rare lesions have not previously been studied by cytogenetics.