Fig. 2
From: Breast metastasis from medullary thyroid carcinoma: a report of a case
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40792-021-01273-w/MediaObjects/40792_2021_1273_Fig2_HTML.png)
Blood test results and progress of treatment. Serum calcitonin level increased after the second surgery. Serum CEA level stayed as high as around upper limit of normal range. PET–CT (b to d) correspond to Fig. 1