Forensic technique uses forehead X-rays to assess age of juvenile remains

June 5, 2017 by Matt Shipman, North Carolina State University
Forensic anthropology researchers at North Carolina State University have developed a technique that can provide an approximate age for juveniles and young people based on an X-ray of the frontal sinus region of the skull. In this image, the skull on the left shows Stage 1 of frontal sinus development (circled in blue). The central skull shows Stage 2. Stage 3 is on the right. Credit: Ann Ross

Forensic anthropology researchers at North Carolina State University have developed a technique that can provide an approximate age for juveniles and young people based on an X-ray of the frontal sinus region of the skull. The technique can be used to help identify human remains in forensic cases, as well as to determine age ranges in archaeological research or for living people for whom no records are available.

In adults, the frontal sinus is a large in the skull just behind the forehead. But it doesn't start that way - the cavity develops gradually over time.

To determine whether the development of the sinus could be used to determine age, the researchers evaluated frontal sinus X-ray images of 392 people between infancy and age 18. They found four distinct stages of development.

Until around the age of 6, the skull is in Stage 0, in which the frontal sinus cannot be detected at all. In Stage 1, two small cavities - with a gap between them - appear behind the central part of the forehead. Stage 1 generally lasts from ages 6 to 8, with a mean age of 6.5.

In Stage 2, the cavities expand, with a clear line showing where the cavities touch - but don't merge. This tends to appear between the ages of 7 and 10, with a mean age of 8.

Stage 3 is a fully developed frontal sinus, characterized by the two cavities merging and expanding. This tends to occur between the ages of 12 and 18, with a mean age of 16.

"This is a proof-of-concept study demonstrating that frontal sinus X-rays offer a viable, noninvasive for estimating the age range of juvenile remains," says Ann Ross, a professor of biological sciences at NC State and senior author of a paper describing the work. "This approach should be particularly valuable when working with incomplete remains."

In addition, Ross says, the technique could be used to help estimate the age of living children and young adults for whom no records are available.

"The next step is to look at a larger sample of X-rays to further fine-tune the technique," Ross says. "It's useful now, but it would be even more valuable if we could improve its specificity."

The paper, "Frontal Sinus Development and Juvenile Age Estimation," is published in The Anatomical Record.

Explore further: Evaluating a minimally disruptive treatment protocol for frontal sinus fractures

More information: Kaitlin Moore et al, Frontal Sinus Development and Juvenile Age Estimation, The Anatomical Record (2017). DOI: 10.1002/ar.23614

Related Stories

Non-invasive sinusitis diagnostics in sight

December 1, 2015

Sinusitis is a very common disease. Most frequently, it can be successfully treated with decongestants and antiinflammatory drugs. Only prolonged infections related to bacteria should be treated with antibiotics. Unfortunately, ...

Recommended for you

When does one of the central ideas in economics work?

February 20, 2019

The concept of equilibrium is one of the most central ideas in economics. It is one of the core assumptions in the vast majority of economic models, including models used by policymakers on issues ranging from monetary policy ...

In colliding galaxies, a pipsqueak shines bright

February 20, 2019

In the nearby Whirlpool galaxy and its companion galaxy, M51b, two supermassive black holes heat up and devour surrounding material. These two monsters should be the most luminous X-ray sources in sight, but a new study using ...

Research reveals why the zebra got its stripes

February 20, 2019

Why do zebras have stripes? A study published in PLOS ONE today takes us another step closer to answering this puzzling question and to understanding how stripes actually work.

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.