• He took his MD in Paediatrics from All India Institute of Medical Sciences, New Delhi. He is the first Pediatrician from Kerala to pass MNAMS in Paediatrics. He was conferred fellowship of Royal College of Glasgow – FRCP in 2009. He had won gold medals as undergraduate and post graduate.

• Dr. C.K. Sasidharan, former Professor and Head of the Department of Paediatrics and Neonatology, Calicut Medical College had decorated several positions while in serve including Superintendent Institute of Maternal and Child Health (IMCH), syndicate member and Dean Faculty of Medical Sciences and Technology, Cochin University; Professor of Paediatrics, MES Medical College, Perithalmanna, Member of Senate and Faculty Calicut University.
• He was primarily responsible for developing Neonatology Unit of Medical College, Calicut with unique feature of maternal involvement in neonatal care. He had been in the forefront for improving the immunization status, nutrition status of tribal children in Wayanad. He maintains high quality work in patient care and research.

• Viral Infections in Children

He had published several original research works in national and international journals. He is credited with reporting to first outbreak of Hand-foot-and-mouth diseases in Kerala- India. He also described a new disease in children – Red Baby Syndrome while working in Baby Memorial Hospital, Calicut.

• Anjay MA, Sasidharan CK, Anoop P. Hepatic subcapsular hematoma: two neonates with disparate presentations. Pediatr Neonatal. 2012 ; 53 (2) :144-6.
• Brown N, Sasidharan CK. Fisher D. Early growth and markers of cardiovascular risk in Keralan children in the integrated child development Scheme. Public Health Nutr. 2010; 13 (7) :1042-8.
• Sasidharan CK, Sugathan P, Mampilly N, Agarwal R, Khare S, Lal S, JayaramPaniker CK. Red baby syndrome a new disease due to parvovirus B-19 observed in Kerala. Indian J Pediatr. 2009 ; 76(3):309-12
• Sasidharan CK, Vijayakumar M. Virnodkumar MS. Effect of phenytoin sodium in reducing blistering of epidermolysisbullosa report of four cases. Indian J DermatolVenereolLeprol. 2002 ; 68 (4):217-9.
• Sasidharan CK, Gokul E, Anoop P, Vijayakuar M, Benefits of maternal participation in newborn nurseries. Indian J Pediatr. 2005 ; 72 (10) : 829-33.
• Sasidharan CK, Sugathan P, Agarwal R, Khare S, Lal S, JayaramPaniker CK. Hand-foot-and-mouth disease in Calicut. Indian J Pediatr. 2005; 72 (1) :17-21.
• Sasidharan CK, Anoop P, Vijayakumar M, Jayakrishnan MP, Reetha G, Sindhu TG. Spectrum of clinical presentations of vein of galen aneurysm. Indian J Pediatr. 2004 ;71 ( 5): 459-63.
• Sasidharan CK, Ravi KV. Popliteal pterygium syndrome with unusal features. Indian J Pediatr. 2004 ;71(3) :269-70.
• Sasidharan CK, Anoop P. Congenital varicella syndrome. Indian J Pediatr. 2003 ; 70(1) :101-3.
• Anoop P, Sasidhran CK. Baller-Gerold syndrome. Indian J Pediatr. 2002; 69 (12):1097-8.
• Sasidharan CK, Anoop P. Anencephaly with placental attachment. Indian J Pediatr. 2002 ; 69 (11) :991-2.
• Sasidharan CK, Kutty PM, Aithkumar, Sajith N. Fetal intracranial hemorrhage due to antenatal low dose aspirin intake. Indian J Pediatr. 2001 ; 68 (11): 1071-2.
• Sasidharan CK, Kumar PS. Vein of Galen aneurysm. Indian J Pediatr. 1990 ; 57 (3) : 446-8.
• Sasidharan CK, Rajagopal KC, Panicker CK. Salmonella typhimurium epidemic in newborn nursery. Indian J Pediatr. 1983 ; 50 (407): 599-605.
• Choudhry VP, Srivastava RN, Arya LS, Sasidharan CK, Ghai OP. Peritoneal dialysis in children: review of 9 years experience. Indian Pediatr. 1978 ; 15 (11): 887-92.
• Singh N, Sasidharan CK, Venkataraman S. Non-compressive myelopathy. J Assoc Physicians India. 1977; 25 (2) :123-9.
• Sasidharan CK, Alexander K.G, Shashikhare. Outbreak of enterovirus 71 meningitis in Calicut.BMJ 2016.

• Alumni oration – CMC 2000
• Eapen Samuel Award, 2010 – Best Publication - 2010
• Oration – IMSACON , 2015 (Pratap Reddy Oration)