TOPOLevel 1

Topography (Anatomic Site)

The TOPO entry in ICD-O-3 designates the topography component, which records the anatomic site of a neoplasm using a four-digit code linked to a specific body region. It complements the morphology code to fully describe a cancer case for registries and research, enabling consistent reporting of tumor location across institutions.

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Hierarchy Explorer

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T-C01Base of Tongue

T-C02Other and Unspecified Parts of Tongue

T-C04Floor of Mouth

T-C06Other and Unspecified Parts of Mouth

T-C07Parotid Gland

T-C08Other and Unspecified Major Salivary Glands

T-C10Oropharynx

T-C11Nasopharynx

T-C12Pyriform Sinus

T-C13Hypopharynx

T-C14Other Ill-Defined Sites in Lip, Oral Cavity

T-C17Small Intestine

T-C19Rectosigmoid Junction

T-C21Anus and Anal Canal

T-C22Liver and Intrahepatic Bile Ducts

T-C23Gallbladder

T-C24Other Biliary Tract

T-C26Other Digestive Organs

T-C30Nasal Cavity and Middle Ear

T-C31Accessory Sinuses

T-C34Bronchus and Lung

T-C38Heart, Mediastinum and Pleura

T-C39Other Respiratory and Intrathoracic Organs

T-C40Bones and Joints

T-C41Bones and Articular Cartilage of Other Sites

T-C42Hematopoietic and Reticuloendothelial Systems

T-C47Peripheral Nerves and Autonomic Nervous System

T-C48Retroperitoneum and Peritoneum

T-C49Connective, Subcutaneous and Other Soft Tissues

T-C53Cervix Uteri

T-C54Corpus Uteri

T-C57Other Female Genital Organs

T-C61Prostate Gland

T-C63Other Male Genital Organs

T-C65Renal Pelvis

T-C68Other Urinary Organs

T-C69Eye and Adnexa

T-C72Spinal Cord and Cranial Nerves

T-C73Thyroid Gland

T-C74Adrenal Gland

T-C75Other Endocrine Glands and Related Structures

T-C76Other and Ill-Defined Sites

T-C77Lymph Nodes

T-C80Unknown Primary Site

Cross-system equivalences0

No cross-system equivalences mapped for this node.

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