• Anatomy
• Surgery
• Oncology

• Breast Cancer
• Oral and Oro-pharyngeal Cancer
• Oesophageal cancer and Soft tissue sarcoma
• Medical Education

• Comparative Study of Prevalence of Migraine among Defence and Non-Defence Undergraduate Students in General Sir John Kotelawala Defence University (KDU), Sri Lanka. International Nursing Congress 2018, Faculty of Allied Health Sciences, University of Peradeniya, Sri Lanka. 5-6, Vol.01, 6th and 7th April 2018. B.B.M.S. Perera, G.G.T. Maduranga, M.L.I.K. Bandara, W.G.C. Kumara, N.R.P. Perera.
• Reconstruction of vulvar lesion with a vertical rectus myocutaneous flap based on Inferior Epigastric vessels. A case report. Sri Lanka Journal of Obstetricians and Gynaecologists 2012; 34: 159-160.Ihalagama H, Perera R, Samarakoon SA, Karunaratne K.
• Validation of sentinel node biopsy in breast cancer: The new era of surgery for breast cancer in Sri Lanka. Sri Lanka Journal of Surgery 2008. N.R.P. Perera, I.Y. Amarasinghe, Naomal Perera, D.C.A. Thevarapperuma, R.S. Manathunga, C. Amarasinghe
• A Case Of Large Symptomatic Leiomyoma Of The Kidney: Difficult Preoperative Diagnosis. Sri Lanka Journal of Surgery 2007 N.R.P. Perera. M.T.D. Lakshan R.P. Abeywickrama K.S. Perera
• A rare cervical spine abnormality associated with neurofibromatosis. Ceylon Medical Journal. Volume 51, No 4, 2006 December N.R.P. Perera, LN Senevirathna, DS de Alwis, SSL Perera

 Presentations

• The paradigm of the earliest method to detect a breast cancer
  I.Y.Amarasinghe, N.R.P. Perera, S.D.Mahaliyana and R.S.Manathunga
  Annual Academic Sessions College of Surgeons Sri Lanka 2010
• Three field oesophagectomy: Vital prognosticator -The lymph none metastatic status analysis
  N.R.P. Perera, I.Y.Amarasinghe, S.D.Mahaliyana and R.S.Manathunga
  Annual Academic Sessions College of Surgeons Sri Lanka 2010
• Neoadjuvant therapy for oesophageal cancer: The Sri Lankan experience
  N.R.P. Perera, I.Y. Amarasinghe, R.S. Manathunga
  Annual Academic Sessions College of Surgeons Sri Lanka 2009
• Chronic subdural haematoma (CSDH): can we predict the outcome?
  N.R.P. Perera, I.Y. Amarasinghe, R.S. Manathunga
  Annual Academic Sessions College of Surgeons Sri Lanka 2009
• Acute EDH: Does volume correlates with GCS
  L.N. Seneviratna, N.R.P.Perera, D.S. de Alwis and S.S.L Perera
  Annual Academic Sessions College of Surgeons Sri Lanka 2007
• Study on casualty admissions to a surgical unit in National Hospital of Sri Lanka.
  N.R.P. Perera, R.P. Abeywickrama, M.T.D. Lakshan, K.S.Perera.
  Annual Academic Sessions College of Surgeons Sri Lanka 2006
• Ureteric colic: Are we over investigating?
  Wasantha Wijenayaka, N.R.P. Perera, S.A. Gunawardana, K.S. Perera
  Annual Academic Sessions College of Surgeons Sri Lanka 2004
• Anatomical variations of the bronchial tree of Sri Lankans: an aid to bronchoscopy.
  N.R.P. Perera, L.N. Seneviratne, S.I. Kulasekara, S.G.Yasawardene.
  Sri Lanka Medical Association 116th Annual Academic Sessions 2003.
• Topographic anatomy of the lateral wall of the nasal cavity : a guide to endoscopic sinus surgery
  L.N. Seneviratne N.R.P. Perera, S.I. Kulasekara, S.G.Yasawardene.
  Annual Academic Sessions College of Surgeons Sri Lanka 2003
• Students? views on computer assisted teaching of gross anatomy and cadaver dissections.
  S.I Kulasekara, N.R.P. Perera, L.N Seneviratne, S.G.Yasawardene.
  6th International Medical Congress Peradeniya 2002

• Visiting Lecturer in Clinical Anatomy at Faculty of Medical Sciences University of Sri Jayewardenepura
• Life Member of the College of Surgeons Sri Lanka
• Member of the College of Oncologists Sri Lanka
• Member of the Royal College of Surgeons of England since 2011
• Fellow of the Royal College of Surgeons of England 2018
• Life Member of the Medical Association Sri Lanka
• Founder Member of the Sri Lanka College of Military Medicine
• Member of the Sub Speciality Board for Surgical Oncology in Board of Surgery, Postgraduate Instittite of Medicine University of Colombo since 2015
• Secretary of the Sub Speciality Board for Surgical Oncology in Board of Surgery, Postgraduate Instittite of Medicine University of Colombo since 2019

• Secretary of the Sub Speciality Board for Surgical Oncology in Board of Surgery, Postgraduate Instittite of Medicine University of Colombo since 2019
• Council member of the Sri Lanka College of Military Medicine 2020