Regions of bowel affected in Malabsorption- Can we clear this?

[voicesinmyhead]

Celiac disease -

Tropical Sprue-

Whipples-

Lactose Intolerance-

Which regions in the small intestine are predominantly affected?

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[Entadus]

small intestine

 

[voicesinmyhead]

Edited qn. thanks.

 

[Transposony]

Jejunum but varies with the disease condition, severity and therefore extent; frequently involving ileum.

 

[voicesinmyhead]

Jejunum but varies with the disease condition, severity and therefore extent frequently involving ileum.

You mean in all those disease above, Jejunum is predominantly affected?

 

[Transposony]

All except Whipple disease in which the malabsorption is due to lymphatic obstruction.
The simple reason being that the offending agent hits the proximal small bowel first.
I don't think USMLE will ask the exact location since they can affect other parts of small bowel but you can read more about it here and here.