Example  sentence has Flesch-Kincaid grade level-15.9

Repeating “in the” for each anatomic segment is laborious to read.

“A site of metastatic disease” is unnecessarily verbose. Removing “a site of” doesn’t change the meaning.   Could say, “no metastatic disease in the skull base, neck, chest, abdomen, pelvis or thighs.”

But since the exam is a PET-CT from skull base to thighs, can simply say “No findings of metastatic disease” without fear of being misunderstood.

No findings of metastatic disease (as i suggest saying), excludes metastatic disease at the skull base, in the neck, in the chest, in the abdomen, in the pelvis or in the proximal portion of thighs. But it’s actually more comprehensive. The example sentence doesn’t exclude possible metastases in the included portions of head, arms and shoulders.

Suggested rewrite is Flesch-Kincaid grade level-10.0.