The Diagnosis Libary includes more than 300 articles created by pathologists to help you learn more about your diagnosis and read your pathology report. The articles in the library are organized by the area of the body involved. Contact us if you need help finding an article or have questions about any of the articles in the library.
Adrenal gland
Adrenocortical adenoma
Adrenocortical carcinoma
Myelolipoma
Pheochromocytoma
Anal canal and anus
High grade squamous intraepithelial lesion (HSIL)
Squamous cell carcinoma
Appendix
Acute appendicitis
Low grade appendiceal mucinous neoplasm (LAMN)
Well-differentiated neuroendocrine tumour (NET)
Bladder, ureters, and urethra
High grade papillary urothelial carcinoma
Low grade papillary urothelial carcinoma
Polypoid cystitis
Urothelial carcinoma
Urothelial carcinoma in situ (CIS)
Bone and bone marrow
Ameloblastoma
Anemia of chronic disease
Chronic lymphocytic leukemia
Chordoma
Chondrosarcoma
Enchondroma
Ewing sarcoma
Fracture
Giant cell tumour of bone
Hemolytic anemia
Iron-deficiency anemia
Megaloblastic anemia
Myelodysplastic syndromes (MDS)
Osteoblastoma
Osteochondroma
Osteoid osteoma
Osteosarcoma
Plasma cell neoplasm
Plasmacytoma
Thrombotic microangiopathy
Brain
Glioblastoma
Meningioma
Oligodendroglioma
Breast
Atypical ductal hyperplasia (ADH)
Columnar cell change (CCC)
Columnar cell hyperplasia (CCH)
Complex sclerosing lesion
Ductal carcinoma in situ (DCIS)
Fibroadenoma
Fibrocystic change
Flat epithelial atypia (FEA)
Granular cell tumour
Invasive ductal carcinoma
Invasive lobular carcinoma
Invasive mucinous carcinoma
Intraductal papilloma
Lobular carcinoma in situ (LCIS)
Papillary lesion
Phyllodes tumour
Pseudoangiomatous stromal hyperplasia (PASH)
Radial scar
Usual ductal hyperplasia
Cervix
Adenocarcinoma in situ (AIS)
Atypical squamous cells, cannot rule out HSIL (ASC-H)
Atypical squamous cells of undetermined significance (ASC-US)
Atypical glandular cells, not otherwise specified (AGS NOS)
Atypical glandular cells, favour neoplastic (AGS)
Cervical intraepithelial neoplasia (CIN)
Endocervical polyp
Endocervical adenocarcinoma
High grade squamous intraepithelial lesion (HSIL)
Low grade squamous intraepithelial lesion (LSIL)
Negative for intraepithelial lesion or malignancy (NILM)
Squamous cell carcinoma
Colon, rectum, and anal canal
Adenocarcinoma
Chronic colitis
Chronic active colitis
Collagenous colitis
Gastrointestinal stromal tumour (GIST)
Hyperplastic polyp
Inflammatory polyp
Invasive adenocarcinoma
Lymphocytic colitis
Microscopic colitis
Mucinous adenocarcinoma
Neuroendocrine carcinoma
Poorly differentiated neuroendocrine carcinoma
Sessile serrated adenoma
Sessile serrated lesion
Sessile serrated polyp
Tubular adenoma
Tubulovillous adenoma
Villous adenoma
Well differentiated neuroendocrine tumour
Duodenum
Celiac disease
Gastrointestinal stromal tumour (GIST)
Peptic duodenitis
Esophagus
Adenocarcinoma
Barrett’s esophagus
Eosinophilic esophagitis
Intramucosal adenocarcinoma
Reflux esophagitis
Squamous cell carcinoma
Squamous papilloma
Fallopian tubes
Endometriosis
Serous tubal intraepithelial carcinoma (STIC)
Gallbladder
Chronic cholecystitis
Kidney
Chromophobe renal cell carcinoma
Clear cell renal cell carcinoma
Papillary renal cell carcinoma
Larynx (vocal cords, aryepiglottic folds, epiglottis, and vestibule)
Keratinizing squamous dysplasia
Granular cell tumour
Squamous cell carcinoma
Squamous carcinoma in situ (CIS)
Squamous dysplasia
Vocal cord nodule
Vocal cord polyp
Liver and bile ducts
Autoimmune hepatitis
Bile duct hamartoma
Cirrhosis
Hepatocellular carcinoma (HCC)
Intrahepatic cholangiocarcinoma
Primary biliary cholangitis (PBC)
Primary sclerosing cholangitis (PSC)
Steatosis
Steatohepatitis
von Meyenburg complex
Lung
Acute lung injury
Adenocarcinoma
Adenocarcinoma in situ (AIS)
Atypical carcinoid tumour
Carcinoid tumourlet
COVID-19
Diffuse alveolar damage (DAD)
NUT carcinoma
Mesothelioma
Minimally invasive adenocarcinoma (MIA)
Organizing pneumonia
Pneumonia
Small cell carcinoma
Squamous cell carcinoma
Typical carcinoid tumour
Usual interstitial pneumonia
Lymph nodes
Burkitt lymphoma
Diffuse large B-cell lymphoma
Follicular lymphoma
Hodgkin lymphoma
Mantle cell lymphoma
Non-Hodgkin lymphoma
Plasma cell neoplasm
Plasmacytoma
Small lymphocytic lymphoma
Nasal cavity and paranasal sinuses (nasal septum, turbinates, maxillary sinus, ethmoid sinus, and sphenoid sinus)
Ameloblastoma
Chronic rhinosinusitis
Intestinal-type adenocarcinoma
Mucosal melanoma
Non-intestinal type adenocarcinoma (non-ITAC)
NUT carcinoma
Olfactory neuroblastoma
Schneidrian papilloma
Sinonasal inflammatory polyp
Sinonasal papilloma
Sinonasal undifferentiated carcinoma (SNUC)
Nasopharynx
Nasopharyngeal carcinoma
Oral cavity (lips, tongue, buccal mucosa, floor of mouth, and hard palate)
Keratinizing squamous dysplasia
Fibroma
Granular cell tumour
Lobular capillary hemangioma
Mucosal melanoma
Oral epithelial dysplasia
Pyogenic granuloma
Squamous cell carcinoma
Squamous carcinoma in situ (CIS)
Squamous dysplasia
Squamous papilloma
Verruca vulgaris
Oropharynx (tonsils, soft palate, and base of tongue)
Non-keratinizing squamous cell carcinoma
Squamous cell carcinoma
Squamous papilloma
Ovary
Atrophy
Benign Brenner tumour
Cellular fibroma
Clear cell carcinoma
Corpus luteum cyst
Cortical inclusion cyst
Cystic follicle
Endometrioid carcinoma
Endometrioid borderline tumour
Endometriosis
Follicle cyst
Immature teratoma
Mature cystic teratoma
Mitotically active cellular fibroma
Mucinous borderline tumour
Mucinous carcinoma
Mucinous cystadenoma
Mucinous cystadenofibroma
Ovarian fibroma
Periovarian adhesions
Serous borderline tumour
High grade serous carcinoma
Low grade serous carcinoma
Serous cystadenoma
Parathyroid gland
Enlarged and hypercellular parathyroid gland
Parathyroid adenoma
Pancreas
Ductal adenocarcinoma
Mucinous cystic neoplasm
Well-differentiated neuroendocrine tumour
Pleura
Mesothelioma
Prostate
Adenocarcinoma
Benign prostatic hyperplasia (BPH)
High grade prostatic intraepithelial neoplasia (PIN)
Salivary glands (parotid, submandibular, and sublingual)
Adenoid cystic carcinoma
Hyalinizing clear cell carcinoma (HCCC)
Mucoepidermoid carcinoma
Oncocytoma
Pleomorphic adenoma
Salivary duct carcinoma
Warthin tumour
Skin
Actinic keratosis
Basal cell carcinoma
Basosquamous carcinoma
Bullous pemphigoid
Compound nevus
Congenital nevus
Cutaneous lupus erythematosus
Cylindroma
Dermatofibrosarcoma protuberans (DFSP)
Dermal nevus
Dermatofibroma
Dysplastic nevus
Epidermoid cyst
Granular cell tumour
Hemangioma
Hidradenoma
Junctional nevus
Keloid scar
Lentigo maligna
Infiltrating basal cell carcinoma
Invasive melanoma
Melanoma in situ
Merkel cell carcinoma
Micronodular basal cell carcinoma
Nodular basal cell carcinoma
Plasmacytoma
Pigmented basal cell carcinoma
Pilar cyst
Poroma
Sclerosing basal cell carcinoma
Seborrheic keratosis
Sebaceous carcinoma
Spiradenoma
Spongiotic dermatitis
Spitz nevus
Squamous cell carcinoma
Squamous carcinoma in situ
Superficial basal cell carcinoma
Syringoma
Trichilemmal cyst
Verruca vulgaris
Xanthelasma
Small bowel
Celiac disease
Gastrointestinal stromal tumour (GIST)
Peptic duodenitis
Soft tissues (muscle, fat, and connective tissue)
Alveolar rhabdomyosarcoma
Angiolipoma
Angiosarcoma
Atypical lipomatous tumour
Deep fibromatosis
Dedifferentiated liposarcoma
Desmoid tumour
Embryonal rhabdomyosarcoma
Ewing family of tumours
Fibromatosis
Ganglion cyst
Giant cell tumour of tendon sheath
Granular cell tumour
Intramuscular lipoma
Kaposi sarcoma
Leiomyosarcoma
Neurofibroma
Nodular fasciitis
Malignant peripheral nerve sheath tumour (MPNST)
Myxoid liposarcoma
Pleomorphic lipoma
Rhabdomyosarcoma
Schwannoma
Solitary fibrous tumour
Spindle cell lipoma
Superficial fibromatosis
Synovial sarcoma
Undifferentiated pleomorphic sarcoma
Well-differentiated liposarcoma
Spinal cord
Meningioma
Stomach
Adenocarcinoma
Chemical gastropathy
Chronic gastritis
Chronic active gastritis
Chronic inactive gastritis
Erosive gastritis
Gastrointestinal stromal tumour (GIST)
Helicobacter gastritis
Hyperplastic polyp
Inflammatory polyp
Reactive gastropathy
Xanthoma
Testis and scrotum
Embryonal carcinoma
Mixed germ-cell tumour
Seminoma
Spermatocele
Yolk-sac tumour
Thyroid gland
Anaplastic thyroid carcinoma
Benign follicular nodule
Encapsulated angioinvasive follicular thyroid carcinoma
Encapsulated angioinvasive Hurthle cell carcinoma
Follicular adenoma
Follicular neoplasm
Hurthle cell adenoma
Hurthle cell carcinoma
Medullary thyroid carcinoma
Minimally invasive follicular thyroid carcinoma
Minimally invasive Hurthle cell carcinoma
Nodular follicular disease
Nodular thyroid hyperplasia
Papillary thyroid carcinoma
Poorly differentiated thyroid carcinoma
Non-invasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP)
Papillary thyroid microcarcinoma
Suspicious for follicular neoplasm
Widely invasive follicular thyroid carcinoma
Widely invasive Hurthle cell carcinoma
Uterus and endometrium
Atrophic endometrium
Atypical endometrial hyperplasia
Carcinosarcoma
Clear cell carcinoma
Disordered proliferative endometrium
Endometrioid carcinoma
Endometrial polyp
Endometrial hyperplasia without atypia
Fibroid
Leiomyoma
Leiomyosarcoma
Proliferative endometrium
Secretory endometrium
Serous carcinoma
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