Colorectal Flashcards

1
Q

Impediments to spontaneous closure of fistulas

A

Foreign body, radiation, inflammation/infection, epithelialization, neoplasia, distal obstruction

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2
Q

Highest risk factor for post op anastomotic leak

A

Fecal contamination. Also, intraop blood loss

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3
Q

Management of fistula in Crohn’s disease

A

Infliximab

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4
Q

Most sensitive step during colonoscopy to rule out GI bleed

A

Intubated the TI

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5
Q

Rx for early return of bowel function after colon surgery

A

12mg Alvimopan preop continued 7 days postop

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6
Q

Haggitt classification

A

0 - superficial to muscularis mucosa
1 - submucosal invasion head of polyp
2 - neck
3 - stalk
4 - below stalk or sessile polyp

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7
Q

Kikuchi classification

A

Sm1 - Upper 1/3 submucosa
Sm2 - Upper 2/3
Sm3 - Lower 1/3

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8
Q

Operative planning rectal cancer

A

CT CAP
MRI pelvis
Rigid proctoscopy

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9
Q

Preop study prior to repair of bladder/rectum prolapse

A

Colonoscopy and urodynamic studies

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10
Q

Best surgical treatment for constipation

A

Total abdominal Colectomy with ileorectal anastomosis

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11
Q

Best diagnostic test for colonic inertia

A

Sitz marker study

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12
Q

UC extraintestinal conditions (which does not resolve with Colectomy)

A

Arthritis, ankylosing spondylitis, erythema nodosum, pyoderma gangrenosum, PSC*

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13
Q

Site of colon and rectum with greatest absorptive capacity

A

Ascending colon

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14
Q

DVT ppx s/p abdominal/pelvic cancer operations

A

28 days LMWH

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15
Q

T3/4 rectal cancer; tx

A

Neoadjuvant chemorads, surgery, adjuvant

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16
Q

Surveillance following endoscopic resection colon cancer

A

Scope 3month, 1 year, 3 years, 5 years

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17
Q

Correct ostomy placement

A

Summit of infraumbilical fold in rectus

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18
Q

Massive GI bleed; surgical tx

A

TAC with end ileostomy

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19
Q

Gold standard for dx of colonic pseudoobstruction

A

CT

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20
Q

Postop surveillance s/p colorectal cancer surgery

A

Clinical exam and CEA 3-6mo for 2, 6mo for 5
CT every 6-12mo for 5 if high risk for recurrence
Colonoscopy 1 yr, 3 then 5

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21
Q

IBS criteria

A

Rome IV; recurrent abdominal pain (at least 1 day/week in the last 3 months) associated with 2 or more:
Related to defecation
Change in stool frequency
Change in stool form

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22
Q

Criteria for transanal endoscopic microsurgery (TEM)

A

T1 without high risk features, <3cm, <30% circumference, 5-15cm from anal verge

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23
Q

Transvaginal repair of rectocele; Critical step

A

Plication of the vaginal muscularis and rectovaginal tissues

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24
Q

Polyp invading submucosa at splenic flexure; tx

A

Extended left hemicolectomy

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25
Q

Sigmoid volvulus; tx

A

Colonic decompression, but needs resection same admission due to high recurrence risk

26
Q

UC with visible high grade dysplasia; next step

A

Repeat endoscopy with bx 3-6months

27
Q

New diagnosis of UC; next screening colonoscopy

A

8 years

28
Q

High risk based on fm hx for colon cancer; screening colonoscopy

A

Age 40 or 10 yrs earlier than relative’s age at dx

29
Q

Rectal carcinoid <1cm; tx

A

Endoscopic or local excision alone

30
Q

Indications for total proctocolectomy in patients with UC

A

Invisible multifocal low grade dysplasia, invisible high grade dysplasia

31
Q

WHO classification polyps

A

Epithelial (adenoma, carcinoma, carcinoids, mixed)
Non-epithelial (lipoma, leiomyoma, GIST, angiosarcoma, melanoma, Kaposi’s sarcoma)
Polyps (hyperplastic, PJ, juvenile)
Secondary tumors

32
Q

Rectal bleeding s/p AAA repair; next step

A

Sigmoidoscopy

33
Q

Cefoxitin redosing intraop

A

2hrs

34
Q

Endometrial, thyroid, breast, renal, colon cancer; syndrome and gene

A

Cowden syndrome, PTEN
May have hamartomas and skin lesions as well

35
Q

FAP s/p TAC with IRA; surveillance

A

yearly endoscopy

36
Q

Amsterdam II Criteria; dx, genes and criteria

A

HNPP or Lynch syndrome (MLH1, MSH2/6, PMS2)
At least 3 relatives with colorectal, endometrial, SB, ureter or renal pelvis cancer
At least 2 successive generations affected
At lest 1 before age 50

37
Q

Gastric, pancreatic, SB cancer, cardiovascular defects; syndrome and gene

A

Juvenile polyposis syndrome, SMAD4 and BMPR1A

38
Q

Gastric, panc, SB cancer with peri oral pigmentation; syndrome and gene

A

Peutz-Jegher, STK11

39
Q

Gastric, duodenal, bladder, breast, ovarian cancer; syndrome and gene

A

MUTYH-asociated polyposis

40
Q

Duodenal, gastric, pancreatic multiple polyps; syndrome and gene

A

Familial adenomatous polyposis, APC

41
Q

Risks of colon radiation

A

Radiation colitis; ulcers, telangiectasias, fistulas

42
Q

Bowel obstruction with pigmented mucosal lesions; dx

A

PJ, hamartomatous polyp causing intussusception

43
Q

Post-strictureplasty hemorrhage; tx

A

Observe

44
Q

Lower GI bleed stable after transfusion/resuscitation; next step

A

Prep -> colonoscopy

45
Q

Colon cancer margin and nodes

A

2-5cm at least 12 nodes

46
Q

Candidates for primary surgical therapy in rectal cancer

A

T1 or T2 (invade submucosa or muscular propria) without clinical nodes

47
Q

Acute diverticulitis failed non-op management; tx

A

Sigmoidectomy with primary anastomosis with diversion vs end-colostomy

48
Q

Ascending colon cancer; tx

A

Right colectomy

49
Q

Hepatic flexure cancer; tx

A

Extended right colectomy

50
Q

No prior colon evaluation now s/p colon resection for obstructing lesion; surveillance

A

3-6months post-op

51
Q

Colonic lipoma; tx

A

Observe, if >2cm can be endoscopically resected

52
Q

Hinchey Classification

A

Ia - pericolic inflammation/phlegmon
Ib - pericolic abscess
II - pelvic/distant abscess
III - purulent peritonitis
IV - feculent peritonitis

53
Q

Normal colonoscopy polyps (10yr f/u)

A

20 or less hyperplastic polyps <1cm

54
Q

3-4 tubular adenomas <1cm or greater 1cm hyperplastic polyp; surveillance interval

A

3-5yrs

55
Q

5-10 adenomas
Sessile polyp > 1 cm
High-risk polyp (TV or Villous >1cm, high grade dysplasia; surveillance interval

A

3years

56
Q

> 10adenomas; surveillence interval

A

1yr

57
Q

Adenoma removed piecemeal; surveillance interval

A

3-6months

58
Q

Appendiceal neuroendocrine tumors requiring staging workup and right hemicolectomy

A

> 2cm
Poor prog features (high mitotic or Ki67)
Involve base
Positive nodes/margins
Goblet cell histology

58
Q

Appendiceal neuroendocrine tumors requiring staging workup and right hemicolectomy

A

> 2cm
Poor prog features (high mitotic or Ki67)
Involve base
Positive nodes/margins
Goblet cell histology

59
Q

Antibiotic bowel prep prior to colon surgery

A

Neomycin 1g + Erythromycin 1g or Neomycin 1g + Metronidazole 1g (3 doses over 10hrs afternoon and evening before operation)

60
Q

Preop IV abxs prior to colon surgery

A

Cephalosporin 2g + Flagyl 500mg IV OR Clinda 900mg + Levoflxacin 500mg (1hr prior)

61
Q

Colon cancer preop workup

A

CT CAP, colonoscopy, CEA, labs