Answer of November 2002

Clinical History:

M/51, Recurrent hemoptysis.

                                        Figure 1

                                        Figure 2

Diagnosis:

Carcinoma of descending colon with intussusception and liver metastases. Synchronous carcinoma of caecum

Discussion:

Figure 1: Thin sections CT thorax- An oval airspace is seen in the right posterolateral aspect of trachea at level of sternal notch.

Figure 2: 3D reconstruction shows a neck between the airspace and trachea.