Dr. John Kelvin Lalusis is a Thoracic Oncologist and Lung Cancer Specialist in the Philippines — a board-certified Medical Oncologist with dedicated subspecialty fellowship training in Thoracic Oncology and Phase I Clinical Trials at the National Cancer Centre Singapore (NCCS), one of Asia's leading cancer centers. His practice centers on lung cancer and other chest (thoracic) cancers, including non-small cell lung cancer (NSCLC), small cell lung cancer, mesothelioma, and thymic tumors. He manages all stages of disease — from early-stage lung cancer through stage 4 (metastatic) lung cancer — using the most current treatment options: targeted therapy for EGFR, ALK, KRAS and other mutations, immunotherapy, chemotherapy, and access to clinical trials. Every treatment plan begins with biomarker and molecular testing, so therapy is matched to each patient's specific tumor profile. Patients commonly consult him for a new lung cancer diagnosis, a suspicious lung nodule or mass, a second opinion, or advanced disease needing next-line options. He also treats head and neck, urologic (prostate, bladder, kidney), breast, and other adult cancers. His subspecialty training in lung cancer is international: a clinical fellowship on the thoracic oncology team at NCCS in Singapore, and a pulmonary oncology observership at the Toulouse University Cancer Institute in France under Europe's leading lung cancer experts. He was selected as an International Association for the Study of Lung Cancer (IASLC) Academy mentee — the sole representative from Southeast Asia in his cohort — and has presented lung cancer research at ESMO, NCCN, and JSMO. As an investigator in international lung cancer clinical trials, he helps bring emerging therapies within reach of Filipino patients. Dr. Lalusis sees patients at St. Luke's Medical Center (Quezon City and Global City–BGC) and the Lung Center of the Philippines, with weekend clinics at Bataan St. Joseph Hospital and Medical Center (Balanga City, Bataan). He also holds select clinic hours at Fatima University Medical Center Antipolo. He completed his Internal Medicine residency and Medical Oncology fellowship at St. Luke's Medical Center, earned his Doctor of Medicine at the University of Santo Tomas, and is a Diplomate of the Philippine Society of Medical Oncology and Fellow of the Philippine College of Physicians.