Drawing of sagittal section of the brain. Annotations on the back read "Patient's name cerebellar tumour".
This image features as figure 29 in the publication E.W. Twining, 'Radiology of the third and fourth ventricles, part II', British Journal of Radiology, 1939, in which it is described as follows: "Medulloblastoma obliterating the fourth ventricle and iter (author's drawing-Manchester series)".
Initialled by the artist, bottom right.