Pathology dictionary

Our pathology dictionary has definitions for more than 200 pathology words and phrases. Select the first letter of the word or phrase you are looking for from the alphabet below or scroll down to see the complete list of articles. Can’t find what you’re looking for? Send us a suggestion for a new article or ask a pathologist your question.

A B C D E F G H I J K L M N O P R S T U V W X Y Z

A

Acanthosis

Acute inflammation

Addendum

Adenoma

Adenocarcinoma

Adenosquamous carcinoma

Adipose tissue

Anaplastic

Apoptosis

Arteriovenous malformation

Atrophic

Atrophy

Atypia

Atypical

AVM

B

Basal lymphoplasmacytosis

Benign

Biopsy

Breslow thickness

C

Calcification

Carcinoma

Carcinoma in situ

Carcinoid

Cautery artefact

CD34

Cholesterol cleft

Cribriform

Chronic inflammation

Chromatin

Crohn’s disease

Crypt abscess

Crypt distortion

Cryptitis

CK7

CK20

Cytokeratin

Cytokeratin 7

Cytokeratin 20

Cyst

D

Desmin

Desmoplasia

Differentiated

Diffuse

Distal

Duct

Dysplasia

E

Epithelial

Epithelium

Estrogen receptor

ER

Excision

Exophytic

F

Fibroadenoma

Fibrosis

FISH

Flow

Fluorescence in situ hybridization

Foamy histiocyte

Focal

Frozen section

Fuhrman grade​

G

Gland

Grade

Granulation tissue

Granuloma

Gross

Gross description

H

Hamartoma

H&E

Hematoxylin and eosin

Heterogeneous

Her2

Homogeneous

HPV

Human papillomavirus

Hyperplasia

Hyperchromatic

Hyperchromasia

Hypergranulosis

Hyperkeratosis

I

IHC

Immunohistochemistry

Immunoglobulin

Inadequate

Infiltrative

Infiltration

Inflammation

Inflammatory cell

Insufficient for diagnosis

Intercellular bridges

Intestinal metaplasia

In toto

Invasion

J

K

Keratinization

Ki-67

KRAS

L

Lesion

Leukocyte

Limited for interpretation

LVI

Lymphocyte

Lymphocytosis

Lymphovascular invasion

Lymphoma

Lymph node

M

Margin

Mass

Malignant

Melanocyte

Melanoma

Metaplasia

Metastasis

Mesothelial cells

MIB-1

Mismatch repair (MMR)

Mitosis

Mitotic figure

Mucosa

Mucin

Multifocal

Myxoid

N

Neoplasm

Necrosis

Negative for malignancy

Neuroendocrine cell

Neuroendocrine tumour

Non-diagnostic

Non-Hodgkin lymphoma

Non-reactive

Non-small cell carcinoma

Nucleus

Nucleoli

O

Osteoid

P

p16

p40

p53

p63

Paneth cell metaplasia

Papillary

Perineural invasion

Plasma cell

Pleomorphic

PNI

Polyp

Precursor

Progesterone receptor

Proximal

PR

Prognosis

Poorly differentiated

Positive for malignancy

pTNM

Q

R

Reactive

Resection

S

Sarcoma

Sarcomatoid

Signet ring cell

SOX10

Stoma

Stroma

Squamous cell

Squamous cell carcinoma

Special stain

Specimen

Spindle cell

Spongiosis

Spongiotic

T

Tangentially sectioned

Tumour

Tumour infiltrating lymphocytes (TILs)

U

Ulcer

Ulcerative colitis

Undifferentiated

Urothelial cell​

V

Viral cytopathic effects

Virus

W

Well differentiated

X

Y

Z

A+ A A-