Case 49: The Hexagonal Pattern in Fibrotic Hypersensitivity Pneumonitis

This is 65-years old non-smoker with antigenic exposure and findings on the CT suggesting fibrotic hypersensitivity pneumonitis (HP). The case and findings including the triple-density sign are discussed in the video.

More importantly, I discuss a new sign, the "hexagonal pattern" recently described, which we have seen, but hadn't been named so far and represents confluent perilobular fibrosis.

Free till 30 Mar 2022