Representation of the various aortic anyrusms

There are many types of Aortic Aneurysms, the two major types are:

TAA: thoracic aortic aneurysm, may further be sub-classified based on location:
1. Ascending aortic aneurysm
2. Aortic arch aneurysm
3. Descending aortic aneurysm
4. Aneurysm that straddles multiple portions of the aorta (i.e. from aortic arch to descending aorta)

AAA: abdominal aortic aneurysm, may further be:
1. Above the renal artery
2. Below the renal artery
3. In the renal artery

You don’t know if someone has aortic aneurysms. You may do screening tests based on family history. Sometimes, some symptoms may be experienced such as back pain, chest pain, pain in the lower abdomen that may be indicative of aortic aneurysm. If someone does have TAA, the possibility of synchronous and metachronous TAAs may be present. So you look at both chest and abdomen. If AAA is present but TAA is not, you make a note too.

Case 1 - Subject has both TAA and AAA

The subject had CT scans performed at the chest and abdomen to look for the presence of aneurysms, if there are any:

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pr.xpt

Row	STUDYID	DOMAIN	USUBJID	PRSEQ	PRTRT	PRLOC	VISIT
1	ABC	PR	ABC-123	1	CT SCAN	CHEST	BASELINE
2	ABC	PR	ABC-123	2	CT SCAN	ABDOMEN	BASELINE

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Modeling both TAA and AAA in CV, note for viewing simplicity, some variables are omitted from the table below.

cv.xpt

Row	STUDYID	DOMAIN	USUBJID	CVSEQ	CVGRPID	CVTEST	CVORRES	CVORRESU	CVLOC	CVMETHOD	VISITNUM	VISIT	CVDTC	CVRESLOC	CVRESLOC Detail
1	ABC	CV	ABC-123	1	1	Aneurysm Indicator	Y		Thoracic Cavity	CT SCAN	1	BASELINE	2020-04-27	Descending Aorta
2	ABC	CV	ABC-123	2	1	Aneurysm Diameter	6	cm	Descending Aorta	CT SCAN	1	BASELINE	2020-04-27
4	ABC	CV	ABC-123	4	2	Dissection Indicator	Y		Thoracic Cavity	CT SCAN	1	BASELINE	2020-04-27	Descending Aorta
6	ABC	CV	ABC-123	6	2	Stanford AoD Classification	Stanford B		Descending Aorta	CT SCAN	1	BASELINE	2020-04-27
7	ABC	CV	ABC-123	7	3	Aneurysm Indicator	Y		Abdominal Cavity	CT SCAN	1	BASELINE	2020-04-27	Infrarenal aorta	proximal to the iliac bifurcation
8	ABC	CV	ABC-123	8	3	Aneurysm Diameter	7	cm	Infrarenal aorta	CT SCAN	1	BASELINE	2020-04-27
10	ABC	CV	ABC-123	10	4	Dissection Indicator	Y		Abdominal Cavity	CT SCAN	1	BASELINE	2020-04-27	Infrarenal aorta	proximal to the iliac bifurcation

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Case 2 - Subject has AAA but TAA is not found

The subject had CT scans performed at the chest and abdomen to look for the presence of aneurysms, if there are any:

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pr.xpt

Row	STUDYID	DOMAIN	USUBJID	PRSEQ	PRTRT	PRLOC	VISIT
1	ABC	PR	ABC-456	1	CT SCAN	CHEST	BASELINE
2	ABC	PR	ABC-456	2	CT SCAN	ABDOMEN	BASELINE

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If I were to model this in CV, I could show that AAA is detected along with its diameter measurement. On top of that, TAA is not detected.

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cv.xpt

Row	STUDYID	DOMAIN	USUBJID	CVSEQ	CVGRPID	CVTEST	CVORRES	CVORRESU	CVLOC	CVLOCDTL	CVMETHOD	VISITNUM	VISIT	CVDTC	CV Result LOC detail
1	ABC	CV	ABC-456	1	1	Aneurysm Indicator	Y		abdominal cavity		CT SCAN	1	BASELINE	2020-04-27	Infrarenal artery (Below the kidneys)
2	ABC	CV	ABC-456	2	1	Aneurysm Length/Diameter	2	CM	abdominal cavity	Infrarenal artery (Below the kidneys)	CT SCAN	1	BASELINE	2020-04-27
3	ABC	CV	ABC-456	1		Aneurysm Indicator	N		thoracic cavity		CT SCAN	1	BASELINE	2020-04-27

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Case 1 - Subject has both TAA and AAA

Case 2 - Subject has AAA but TAA is not found