There is a left fronto-parietal scalp soft tissue irregularity and swelling with an open frontal bone defect. There is regional lytic bone destruction involving the inner and outer tables. Features consistent with the local recurrence of the known scalp squamous cell carcinoma.
There is an underlying tension pneumocephalus (extra-axial) with a Mount Fuji sign and scattered gaseous locules additionally.
There are bilateral pan-hemispheric subdural hygromata.
There is an air-fluid level due to the tension pneumocephalus and the presence of bilateral hygromata with a dramatic appearance on CT scout views too.
Incidental calcifications:
dural
bilateral basal ganglia
post fossa
senile calcific scleral plaques
Image courtesy: Dr. DH Jogi