
Ultrasonography showed a large multiseptated cystic mass in the posterior part of the left side of the neck. No obvious vascular flow evident within the mass (Figures 3 and 4).

Ultrasonography showed a large multiseptated cystic mass in the posterior part of the left side of the neck. No obvious vascular flow evident within the mass (Figures 3 and 4).

A 15-year-old Hispanic boy with refractory T-cell acute lymphoid leukemia was hospitalized because of fever and pain and swelling of the right knee of 3 days' duration. The patient was taking nelarabine for a recurrence of his leukemia, which was diagnosed a year earlier. He appeared nontoxic. His temperature was 39.28C (102.68F). Other vital signs were within normal limits. The right knee was warm and tender, with mild restriction of movement.

December 1st 2007

May 1st 2008