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Author8 Posts
  #1

Hi everyone,

I am a very slow reader when it comes to studies. But when a topic interests me, I pick up speed (I am very fast at reading novels!!).
I started reading medicine for step 2Ck a week back..(have started with Gastro; planning to give my step around Oct end)..let us make 'studying medicine' interesting. Let us get involved every now & then..
There is no better way to generate interest than to discuss questions-whether easy or tough or usmle format or just queries/doubts.
So, let us start...




  #2

A 25-year-old female with cystic fibrosis is diagnosed with chronic pancreatitis. She is at risk for all of the following complications except -
A. vitamin B12 deficiency
B. vitamin A deficiency
C. pancreatic carcinoma
D. niacin deficiency
E. steatorrhea


  #3

nishantmenon wrote:
A 25-year-old female with cystic fibrosis is diagnosed with chronic pancreatitis. She is at risk for all of the following complications except -
A. vitamin B12 deficiency
B. vitamin A deficiency
C. pancreatic carcinoma
D. niacin deficiency
E. steatorrhea





i think the answer is B. please correct me if am wrong



  #4

Ans is D

Niacin is a water-soluble vitamin, and absorption is not affected by pancreatic exocrine dysfunction.

B… as pancreatic enzymes are essential to fat
digestion, their absence leads to fat malabsorption and steatorrhea. As such, the fat soluble vitamins, A, D, E, and K, are not absorbed.



  #5

Also note that although Vitamin B12 is water-soluble, yet it is often deficient. The deficiency is hypothesized to be due to excessive binding of cobalamin by cobalamin-binding proteins other than intrinsic
Factor (pancreatic proteases help cleave B12 off R-factor ‘Haptocorrin’ so that it is available for IF) that are normally digested by pancreatic enzymes.



Attached Files:
b12.jpg (39 KB, 5 downloads)
attachment
  #6

A 69 y/o woman comes with 1 wk h/o lower abdomen pain & bloody diarrhoea. H/o stable angina & Mi 4 yrs back. Temp 38.6C. BP , pulse normal. Exam- moderate tenderness to palpation on LLQ. Rectal exam - bloody stools & no masses. No recent h/o travel. Most likely diagnosis?

1. diverticulitis
2. diverticulosis
3. Ulcerative colitis
4. AV malformation
5. Ischemic colitis




  #7

Diverticulitis? Patient has fever, indicating an infection. So dat cannot be UC, AVM, Ischemic colitis, diverticulosis. correct?


  #8

@Hk...thats what I thought. But the answer is 5. Ischemic colitis !!!
can someone explain...





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