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Receipt of previous diagnoses and endoscopy and outcome from esophageal adenocarcinoma: a population-based study with temporal trends.
Cooper GS, Kou TD, Chak A. Cooper GS, et al. Among authors: chak a. Am J Gastroenterol. 2009 Jun;104(6):1356-62. doi: 10.1038/ajg.2009.159. Epub 2009 May 12. Am J Gastroenterol. 2009. PMID: 19491849
METHODS: All patients aged 68 years and older with a new diagnosis of adenocarcinoma of the esophagus from 1994 to 2002 were identified from a linked tumor registry health claims database. ...CONCLUSIONS: Although only a minority of at-risk patients were iden …
METHODS: All patients aged 68 years and older with a new diagnosis of adenocarcinoma of the esophagus from 1994 to 2002 were identifi …
Electronic endoscopy, blood flow measurement and autofluorescence tissue spectroscopy.
Chak A, Sivak MV. Chak A, et al. Endoscopy. 1994 Jan;26(1):169-74. doi: 10.1055/s-2007-1008942. Endoscopy. 1994. PMID: 8205989 Review. No abstract available.
Traveler's diarrhea.
Chak A, Banwell JG. Chak A, et al. Gastroenterol Clin North Am. 1993 Sep;22(3):549-61. Gastroenterol Clin North Am. 1993. PMID: 8406730 Review.
A variety of infectious enteric pathogens (bacterial, viral, and protozoal) can lead to a systemic diarrheal illness in international travelers traveling from industrialized countries to developing areas of the world. ...This article also discusses issues important
A variety of infectious enteric pathogens (bacterial, viral, and protozoal) can lead to a systemic diarrheal illness in intern
Endoscopic ultrasonography.
Pollack BJ, Chak A, Sivak MV Jr. Pollack BJ, et al. Among authors: chak a. Semin Oncol. 1996 Jun;23(3):336-46. Semin Oncol. 1996. PMID: 8658217 Review.
EUS is unique in its ability to image the gastric wall as a 5-layer structure that correlates with actual histological layers. ...
EUS is unique in its ability to image the gastric wall as a 5-layer structure that correlates with actual histological layers. ...
Prognosis of esophageal cancers preoperatively staged to be locally invasive (T4) by endoscopic ultrasound (EUS): a multicenter retrospective cohort study.
Chak A, Canto M, Gerdes H, Lightdale CJ, Hawes RH, Wiersema MJ, Kallimanis G, Tio TL, Rice TW, Boyce HW Jr, et al. Chak A, et al. Gastrointest Endosc. 1995 Dec;42(6):501-6. doi: 10.1016/s0016-5107(95)70001-3. Gastrointest Endosc. 1995. PMID: 8674918
BACKGROUND: Endosonography is a significant advance in the preoperative staging (TNM classification) of esophageal cancer. Its accuracy for evaluating depth of tumor invasion is over 80%. ...CONCLUSIONS: Endosonography accurately identifies patients with invasive T4 tumors …
BACKGROUND: Endosonography is a significant advance in the preoperative staging (TNM classification) of esophageal cancer. Its accura …
Care of patients with upper gastrointestinal hemorrhage in academic medical centers: a community-based comparison.
Cooper GS, Chak A, Harper DL, Pine M, Rosenthal GE. Cooper GS, et al. Among authors: chak a. Gastroenterology. 1996 Aug;111(2):385-90. doi: 10.1053/gast.1996.v111.pm8690203. Gastroenterology. 1996. PMID: 8690203
BACKGROUND & AIMS: A common perception among purchasers is that academic medical centers are inefficient and overutilize technology; however, little empirical information exists. ...These findings are noteworthy at a time when viability of academic centers and f …
BACKGROUND & AIMS: A common perception among purchasers is that academic medical centers are inefficient and overutilize technolo …
Methylene blue selectively stains intestinal metaplasia in Barrett's esophagus.
Canto MI, Setrakian S, Petras RE, Blades E, Chak A, Sivak MV Jr. Canto MI, et al. Among authors: chak a. Gastrointest Endosc. 1996 Jul;44(1):1-7. doi: 10.1016/s0016-5107(96)70221-3. Gastrointest Endosc. 1996. PMID: 8836709 Clinical Trial.
CONCLUSIONS: Methylene blue mucosal staining is a safe, inexpensive, reproducible, and highly accurate method of diagnosing specialized columnar epithelium in Barrett's esophagus....
CONCLUSIONS: Methylene blue mucosal staining is a safe, inexpensive, reproducible, and highly accurate method of diagnosing specializ …
Clinical variables associated with colorectal cancer on colonoscopy: a prediction model.
Chak A, Post AB, Cooper GS. Chak A, et al. Am J Gastroenterol. 1996 Dec;91(12):2483-8. Am J Gastroenterol. 1996. PMID: 8946970
A group of 653 patients was randomly selected to derive a model predictive of colorectal cancer at colonoscopy; the remaining 328 patients were used to validate the model. ...Assigning a score of 1 to each variable, cancer was present in 0% [95% confidence in
A group of 653 patients was randomly selected to derive a model predictive of colorectal cancer at colonoscopy; the remaining
Endosonographic differentiation of benign and malignant stromal cell tumors.
Chak A, Canto MI, Rösch T, Dittler HJ, Hawes RH, Tio TL, Lightdale CJ, Boyce HW, Scheiman J, Carpenter SL, Van Dam J, Kochman ML, Sivak MV Jr. Chak A, et al. Gastrointest Endosc. 1997 Jun;45(6):468-73. doi: 10.1016/s0016-5107(97)70175-5. Gastrointest Endosc. 1997. PMID: 9199902
BACKGROUND: Endosonography (EUS) is a valuable technique for diagnosing gastrointestinal stromal cell tumors. However, EUS features that are predictive of malignancy in these tumors have not been defined. METHODS: Videotapes and photographs of EUS examinations performed pr …
BACKGROUND: Endosonography (EUS) is a valuable technique for diagnosing gastrointestinal stromal cell tumors. However, EUS features t …
Warfarin therapy complicated by recurrent hemobilia in a patient with sarcoidosis.
Pollack BJ, Chak A, Dahman B, Sivak MV Jr. Pollack BJ, et al. Among authors: chak a. Gastrointest Endosc. 1997 Jul;46(1):72-6. doi: 10.1016/s0016-5107(97)70215-3. Gastrointest Endosc. 1997. PMID: 9260711 No abstract available.
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