dr. mariyam nahuza, dr loo gou hoo, associate professor dato dr nik ritza kosai.  (2026).  transoral outlet reduction (tore) for late complications of roux-en-y gastric bypass a case series of weight recidivism & dumping syndrome.  - sabah surgical conference 2026 with mugis.  . 

wei lun tan, guo hou loo, guhan muthkumaran, nik ritza kosai .  (2026).  long term weight loss and metabolic outcomes after bariatric surgery in a large asian cohort: a real-world cohort study .  - sabah surgical conference 2026 with mugis .  . 

su teng lau, guo hou loo, nik ritza kosai .  (2026).  metabolic bariatric surgery versus medical therapy for type 2 diabetes: a 5-year real-world cost and remission analysis .  - sabah surgical conference 2026 with mugis (ssc26-mugis).  . 

nik ritza kosai nik mahmood.  (2025).  belon telan allurion jadi pilihan.  - harian metro.  . 

rafe'aton md. ali, nik ritza kosai nik mahmood, loo guo hou.  (2025).  allurion ballon: a medical innovation to treat obesity without surgery.  - fokus bernama.  . 

nik ritza kosai nik mahmood.  (2025).  kaedah belon bantu atasi masalah obesiti.  - berita harian.  . 

nik ritza kosai nik mahmood, kok wei hao, lee chong chearn, azmi baharudin, deborah chew chia hsin, nor azmin aziz, norlela sukor.  (2025).  hctm pioneers endoscopic sleeve gastroplasty in fight against obesity.  - malaysiakini.  . 

nik ritza kosai nik mahmood.  (2025).  bariatrik bukan jalan pintas untuk cantik.  - sinar harian.  . 

halina md. noor, nik ritza kosai nik mahmood.  (2025).  rawatan obesiti tanpa pembedahan, parut.  - utusan malaysia.  . 

soon li wei, nik ritza kosai nik mahmood, norlela sukor.  (2025).  esg: a breakthrough option for weight loss, say hctm experts.  - bfokus.  . 

wan ahmad atarmizi, nik ritza kosai nik mahmood.  (2025).  why bariatric surgery is classified as a treatment for disease, not an easy way out.  - sinar daily.  . 

nik ritza kosai, jeffrey bronks, loo guo hou.  (2025).  scalable solutions for mid-tier obesity: revisiting the role of igbs.  - omnihealth practice.  . 

nik ritza kosai nik mahmood.  (2024).  allurion announces publication of new data demonstrating continued weight loss at one year on the allurion program .  - bussiness wire.  . 

rajdave s, gh loo, m. guhan, kosai nr.  (2024).  proximal margin involvement following total gastrectomy for seiwert iii adenocarcinoma; a management dilemma.  - 10th asia-pacific gastroesophageal cancer congress.  . 

fauziyah ashraf, loo guo hou, khairul anwar abdul rahman, wan izzah wan jaffar, guhan muthkumaran, nik ritza kosai.  (2024).  sister mary joseph’s nodule as a metastatic presentation in breast carcinoma.  - international surgical week 2024.  . 

tarmizi z, gh loo, guhan m, azna a, nr kosai.  (2024).  unveiling the mystery of the black oesophagus.  - international surgical week 2024.  . 

nur fatin najlaa mohd nasir; norlia abdullah; nik ritza nik kosai; fuad ismail.  (2024).  atropine for pseudoptyalism secondary to para-oesophageal lymph node metastases from a breast carcinoma: a case report.  - international surgical week.  . 

nik ritza kosai; sou jing kim; firdaus che ani; guhan muthukumanan.  (2024).  ‘performing the unthinkable’ endoscopic retrieval of a retained nasogastric tube using an olympus loop cutter following a thoracoscopic ivor lewis esophagectomy. a case report and review of the literature..  - international surgical week.  . 

nik ritza kosai; guhan muthukumanan; ismail ahmed ali.  (2024).  palliative options in advanced oesophageal cancer: a case report and review of the literature.  - international surgical week.  . 

khairul anwar bin abdul rahman; sarah liyana binti mohd hisham; loo guo hou; wan izzah wan jaafar; fauziyah ashraf; azna ali; guhan muthukumaran; nik ritza kosai.  (2024).  revision laparoscopic mini- gastric bypass and removal of gastric band.  - international surgical week.  . 

nur fatin najlaa mohd nasir; guhan muthkumaran; ismail ahmed ali; nik ritza kosai; aishath azna ali; rozilah ishak; suria hayati md pauzi.  (2024).  xanthogranulomatous inflammation (xgi) of the terminal ileum, caecum, and appendix mimicked as appendicular mass: a case report and literature review.  - international surgical week.  . 

nik ritza kosai nik mahmood.  (2023).  how a balloon can help obese persons lose weight.  - the star.  1-7. 

nik ritza kosai nik mahmood.  (2023).  kitakurang-obesity management programme that helps malaysians live healthier, happier and fuller lives.  - kl happening events.  1-3. 

norlaila mustafa, aznida firzah abdul aziz, nik ritza kosai nik mahmood,norasyikin a wahab,zahara abdul manaf, arimi fitri mat ludin, joyce hong soo synn, mohd helmy mokhtar.  (2023).  cpg management of obesity (2nd edition).  - .  1-122. 

nik ritza kosai nik mahmood.  (2023).  the business station (bfm).  - what do intragastric balloons offer in obesity management?.  . 

nik ritza kosai.  (2023).  alternatif turunkan berat badan: kaedah bariatrik, belon intragastrik bantu kawal obesiti.  - berita harian.  25. 

nik ritza kosai nik mahmooh.  (2023).  pembedahan bariatrik rawat obes sahaja.  - metro ahad.  3. 

mza zainuddin, j che hamzah, nr kosai, tc cheng, bastion mlc.  (2023).  nutritional optic neuropathy - bariatric surgery gone wrong.  - 12th conjoint ophthalmology scientific conference.  1-2. 

asif sukri, alfizah hanafiah, nik ritza kosai.  (2023).  cd54, cd55 and cd71 regulate interleukin-8 secretion of helicobacter pylori-infected gastric epithelial cells in strain-dependent manner.  - simposium biologi kebangsaan 2023.  1. 

mohanraj t, nik ritza kosai.  (2022).  predictors associated with morbidity of ureteral stent related symptoms (srs) in patients with in-dwelling ureteric stents in hospital serdang.  - assessment of dissertation defense day.  21. 

david gan, nik ritza kosai.  (2022).  performance and diagnostic accuracy of scoring systems in patients with suspected adult appendicitis.  - assessment of dissertation defense day.  25. 

nik ritza kosai nik mahmood.  (2022).  'sentuhan emas' dr nik ritza kosai.  - harian metro.  1-7. 

nabilah hisham, alfizah hanafiah, tan geok chin, nik ritza kosai, muaatamarulain mustangin.  (2022).  detection of expressed pro-inflammatory cytokine interleukin-32 in gastric cancer patients from ukm medical centre (ukmmc) using immunohistochemistry (ihc).  - gut 2022.  1. 

nik ritza kosai nik mahmood , muhammad maaya , lee qi zheng.  (2022).  the role of lntraperitoneal instillation of local anaesthesia (ropivacaine) for postoperative pain management in laparoscopic sleeve gastrectomy surgery (lsgs):rosle randomised controlled trial.  - assessment of dissertation defense day.  30. 

nik ritza kosai nik mahmood, hardip singh gendeh, mardiana mardan.  (2021).  managing diabetes through surgery.  - the health.  14-15. 

nik ritza kosai nik mahmood.  (2021).  what to know about obesity in malaysia.  - tatler malaysia.  1. 

asif sukri, alfizah hanafiah, nik ritza kosai, mustafa mohamed taher, isa mohamed rose.  (2021).  cluster of differentiation (cd) antigens as biomarkers for prognosis of different subtypes of gastric cancer: a preliminary study.  - precision health in industrial revolution 4.0 (ir 4.0): the technologies and health transformation.  20. 

alfizah hanafiah, nabilah hisham, tan geok chin, muaatamarulain mustangin, nik ritza kosai nik mahmood.  (2021).  expression of interleukin-32 in gastric cancer patients in ukm medical centre (ukmmc).  - .  1-5. 

nik ritza kosai nik mahmood, hardip singh gendeh, mardiana mardan.  (2020).  the health.  - obesity a serious risk factor in covid-19.  16-17. 

mohd hafidzul bin jasman;zulkifli bin md. zainuddin;goh eng hong;ng min hwei;fam xeng inn;tan guan hee;reynu a/p rajan;nik ritza kosai bin nik mahmood;mohamad aznan bin shuhaili;fatimah binti mohd nor.  (2020).  exploring the role of modified adipose derived stem cell-based self-assembled scaffold in the engineering of full thickness human urethra.  - .  . 

alfizah binti hanafiah;nik ritza kosai bin nik mahmood;raja affendi bin raja ali;mustafa mohammed taher;isa b mohamed rose.  (2019).  analysis of cluster of differentiation (cd) antigens in h. pylori-associated gastric cancer and non-gastric cancer.  - .  1-6. 

nik ritza kosai nik mahmood.  (2019).  cutting away obesity.  - the health.  14-15. 

m. azman, n. sze yin, m mat baki, a. sani, n.r. kosai.  (2018).  surgical versus conventional weight loss therapy for obstructive sleep apnea, a randomized controlled trial: quantitative and qualitative outcome.  - 9th isss international surgical sleep society meeting.  . 

alfizah hanafiah, muhammad hafiz, asif sukri, raja affendi raja ali, nik ritza kosai, mohamad aznan shuhaili, mustafa mohammed taher.  (2018).  immunophenotyping of gastric cancers and non-gastric cancers using cluster of differentiation (cd) antibody microarray.  - 8th regional conference on molecular medicine in conjunction with 4th national conference for cancer research.  . 

nik ritza kosai nik mahmood.  (2017).  pembedahan bariatrik tangani diabetes.  - harian metro.  20. 

nik ritza kosai bin nik mahmood.  (2017).  surgery for diabetes?.  - the star.  9. 

nik ritza kosai.  (2017).  3rd international conference on advances in medical science 2017.  - adenocarcinoma of the gastro-oesophageal junction : the rise of a silent killer.  . 

nik ritza kosai nik mahmood.  (2017).  bariatric surgery : timing.  - liver update 2017.  . 

hl tan, cs ngiu, nr kosai, j naidu, r abdul rani, mh elias, nm mokhtar, na hamid, ra raja ali.  (2016).  the application of serum biomarkers to detect pre-malignant lesions in gastric corpus.  - annual scientific congredd of the malaysian society of gastroenterology and hepatology.  . 

r reynu, nr kosai.  (2015).  predicting remission of type 2 diabetes mellitus following laparoscopic bariatric surgery in morbidly obese malaysians: a randomised controlled trial.  - 4th national & 1st mediterranean congress on surgery for morbid obesity and metabolic disorders.  . 

alfizah hanafiah, asif sukri, nik ritza kosai, mustafa mohamed taher, isa mohamed rose.  (2015).  distinct cd antigens expression in helicobacter pylori-infected and -uninfected gastric cancer patients.  - gut 2015: annual scientific congress of malaysian society of gastroenterology & hepatology.  . 

asif sukri, alfizah hanafiah, nik ritza kosai, mustafa mohamed taher, isa mohamed rose.  (2015).  cd antigen expression in helicobacter pylori-infected patients with chronic gastritis and gastric cancer.  - minggu penyelidikan perubatan & kesihatan ke-17.  . 

asif sukri, alfizah hanafiah, nik ritza kosai, mustafa mohamed taher, isa mohamed rose.  (2015).  distinct helicobacter pylori caga genotypes induced different immunopheotypic changes of cd antigens in gastric adenocarcinoma cell line.  - minggu penyelidikan perubatan & kesihatan ke-17.  . 

r rajan, lks christopher, nr kosai, l kesu balani, m mohammed taher, s das, pa sutton.  (2015).  improvement of pulmonary function following a structured exercise regime in obese population: a universuty hospital experience in malaysia.  - 46th world congress of surgery international society of surgery 40th rsct annual scientific congress.  . 

mm taher, nrk nik mahmood, aa wahidy, r rajan.  (2015).  stump appendicitis : diagnosis dilemma and technical challenge.  - 46th world congress of surgery international society of surgery 40th rsct annual scientific congress.  . 

elsa r, reynu r, kosai n r, yugasaravanan k.  (2015).  laparoscopic transgasrtic enucleation of a peri-cardial gastrointestinal stomal tumour (gist).  - annual scientific meeting college of surgeons academy of medicine of malaysia.  . 

r reynu, n r kosai, m t mustafa, k w chan.  (2015).  breast-esophagus syndrome: esophageal metastasis from invasive ductal carcinoma of breast.  - annual scientific meeting college of surgeon academy of medicine of malaysia.  . 

n r kosai, h s gendeh, m t mustafa, r reynu.  (2015).  an innovative method of managing early buried bumper syndrome.  - annual scientific meeting college of surgeon, academy of medicine of malaysia.  . 

a haniffa, r reynu, n r kosai.  (2015).  comparison between laparoscopic sleeve gastrectomy and laparoscopic roux-en-y gastric bypass in predicting the remission of type 2 diabetes mellitus in morbidly obese population.  - annual scientific meeting college of surgeon,academy of medicine of malaysia.  . 

a t hizami, r reynu, n r kosai, m t mustafa, g tikfu.  (2015).  laparoscopic sleeve gastrectomy versus laparoscopic banded gastric plication: a combined university hospital experience.  - college of surgeon, academy of medicine of malaysia.  . 

nik ritza kosai nik mahmood.  (2015).  surgery and endoscopic therapy as the new treatment option for metabolic syndrome and diabetes: a paradigm shift.  - 2nd international conference on advances in medical science (icams).  . 

n kosai, y yussra, p a sutton, h f shabbar, r razrim, t mustafa, a tamil, r reynu.  (2015).  the early outcomes of a randomized single blinded prospective study of laparoscopic inguinal hernia repair: tac fixation versus self adhesive mesh.  - 1st world conference on abdominal wall hernia surgery.  . 

nr kosai, hs gendeh, mm taher, r reynu.  (2014).  a creative treatment to treating early buried bumper syndrome.  - msgh annual scientific congress & ecco educational workshop.  . 

nr kosai, hs gendeh, mm taher, pa sutton.  (2014).  laparoscopic totally transhiatal diverticulectomy of giant epiphrenic oesophageal diverticulum.  - agm & annual scientific meeting.  . 

nur afdzillah ar, gendeh h, zulkifli i, nik ritza kosai nm, sagap i.  (2014).  blatchford and rockall scores in predicting ugib severity in single tertiary centre, experience in 50 consecutive urgent ogds: a prospective observational study.  - agm & annual scientific meeting.  . 

sm rusli, mm taher, nr kosai.  (2014).  body mass index and obstructive sleep apnoea.  - agm & annual scientific meeting.  . 

arvind jagwani, nr kosai, mm taher.  (2014).  bariatric surgery on the outcome of hypertension.  - agm & annual scientific meeting.  . 

anitha h, kosai n.  (2014).  surgical treatment of type 2 diabetes mellitus.  - agm & annual scientific meeting.  . 

jh soh, mustafa taher, nik ritza kosai.  (2014).  prevalence of cardiac dysfunction among morbidly obese and metabolic syndrome patients.  - agm & annual scientific meeting.  . 

nr kosai, mm taher, kb levin, ct tang, yc lim.  (2014).  synchronous gastric carcinoma and pancreatic tumors.  - agm & annual scientific meeting.  . 

hs gendeh, nr kosai, sa watson, r kumari.  (2014).  cancer stem cells and chemoresistance in breast, prostate and colon cancer.  - agm & annual scientific meeting.  . 

nik ritza kosai.  (2014).  bariatric surgery in asia and malaysia.  - agm & annual scientific meeting.  . 

nik ritza kosai nik mahmood.  (2013).  are we ready for bariatric surgery in treating patients with nafld? the debate: proponent.  - 10th liver update 2013 international conference.  . 

y yussra, h f shaba, n kosai.  (2013).  early outcome on randomized single blinded prospective study of laparoscopic inguinal hernia repair : tac fixation versus self adhesive mesh.  - annual general meeting & annual scientific meeting.  . 

nm nik kosai, m taher, c p ooi, z suehazlyn, s norlela, s norlaila, aw norasyikin, o ahmad marzuki, s mohammad arif, m azura dina, ws wan juani, k nor azmi.  (2013).  outcome of bariatric surgery following failed conservative weight management: the universiti kebangsaan malaysia medical centre experience.  - the 17th afes congress.  . 

cp ooi, nik kosai nm, m taher, z suehazlyn, s norlela, m norlaila, aw norasyikin, mohammad arif, o ahmad marzuki, ar anilah, m azura dina, ws wan juani, k nor azmi.  (2013).  comparing bariatric surgery versus non-surgical treatments experience in universiti kebangsaan malaysia medical centre.  - the 17th afes congress.  . 

ooi cp, suehazlyn z, nm nik kosai, m taher, aw norasyikin, s norlela, m norlaila, o ahmad marzuki, s mohammad arif, ar anilah, m azura dina, ws wan juani, k nor azmi.  (2013).  the multidisciplinary endocrine obesity clinic : the universiti kebangsaan malaysia medical centre experience with non-surgical weight loss management.  - the 17th asean federation of endocrine societies congress.  . 

nik ritza kosai nik mahmood.  (2013).  parietex progriptm self-fixating mesh in laparoscopic hernia repair.  - .  . 

nik ritza kosai nik mahmood.  (2013).  tingkatkan peluang untuk hidup.  - kompilasi majalah isihat & mingguan malaysia.  . 

nur hasyimah othman, dr nik ritza kosai nik mahmood.  (2013).  mengapa sakit perut?.  - isihat.  . 

rafidah rosli, nik ritza kosai.  (2013).  makanan masin rangsang serangan kanser esofagus.  - isihat.  . 

noorharisman, pa sutton, nr kosai.  (2012).  managing the challenges of chron`s disease with complex enterocutaneous fistula: an approach to reconstructive surgery.  - annual scientific meeting of the malaysian society of gastroenterology and hepatology.  . 

my rizal, nr kosai, rozman, j razman, h hanafiah, srijit das.  (2012).  arterial embolization of a bleeding gastric dieulafoy lesion: a case report.  - annual scientific meeting of the malaysian sociaety of gastroenterology and hepatology 2012.  . 

fj ruhi, y yazmin, r razrim, z rozman, j razman, mr dzulkhairi, nr kosai.  (2012).  a comparison of transarterial angioembolization versus surgery after failed endoscopic therapy for non variceal upper gastrointestinal bleeding.  - annual scientific meeting of the malaysian society of gastroenterology and hepatology.  . 

noorharisman, pa sutton, nr kosai.  (2012).  a case of closed loop small bowel obstruction within a strangulated insional hernia and an associated with an acute gastric volvulus.  - annual scientific meeting of the malaysian society of gastroenterology and hepatology.  . 

fj ruhi, nr kosai, j razman.  (2012).  where is the portal vein?.  - msgh e-bulletin.  . 

noor hidayah shafiee, nik ritza kosai.  (2012).  bedah & buang perut: tingkatkan peluang untuk hidup.  - isihat.  . 

y yussra, nr kosai, r razrim, a azlan, j razman.  (2011).  early experience of the lateral approach for laparoscopic splenic preserving distal pancreatectomy.  - annual general meeting & annual scientific meeting.  . 

nor faezan ar, azlanudin a, razrim r, nr kosai.  (2011).  prolapse of gastric polyps causing intermittent, recurrent gastric outlet obstruction.  - annual scientific meeting of the malaysian society gastroenterology and hepatology.  . 

kosai nr, razrim r, varghese t.  (2011).  laparoscopic trans-abdominal pre-peritoneal (tapp) inguinal hernia repair using a novel self-adhesive mesh..  - college of surgeon annual scientific meeting.  .