Neoplasm of uncertain behavior of skin. 17-year-old woman with 1 cm nodule in the occipital area which is intermittently tender. Lipoma versus cyst versus bony abnormality. The palpable area in the occiput appears to originate from the bone and cannot be further evaluated using ultrasound. There is no evidence of a lipoma or cyst in the subcutaneous tissues which were able to be evaluated.
Palpable abnormality is within bone and could be better evaluated using CT or MRI. Ultrasound revealed no abnormality in the overlying soft tissues.