Fig. 1

CT and MRI images of the 41-year-old female patient. A Chest CT images shows that a huge irregular and well-defined mass in medial basal segment of lower lobe of right lung. B Contrast-enhanced chest CT scan in delayed phase illustrates a mass-like shadow, which has irregular and well-circumscribed lobulated shape. Low-density cystic mass is obvious at the margin of the lesion (white arrow). C Five months later, chest CT scan displays multiple well-defined nodules and masses in bilateral lungs, suggesting recurrence and metastasis of MTT. D MRI image indicates that a tissue mass with homogeneous density grows in the vertebral index at T4-T5. Rather more radical anatomical consequences of MTT metastasis within thoracic region were also noted and included severe destruction of bone tissue on the right thoracic pedicle, plate and transverse processes of the T4 and T5 segments alongside tumor invasion of adjacent ribs, pleura and soft tissues (yellow arrows). Aside these, an outward dispersal of the lesion from the spinal dura mater and uncontrolled growth within the thoracic spinal cord was also observed (red arrow)