[Durgical](https://durgical.com/en/) › [DurgiPedia](https://durgical.com/en/durgipedia/) › [General pathology](https://durgical.com/en/general-pathology/) › [A to Z](https://durgical.com/en/general-pathology/a-z/) › P # General pathology: P 61 pages - [**Paget disease of bone** Bones, joints and soft tissue · Lesion](https://durgical.com/en/general-pathology/paget-disease-of-bone/) - [**Pancreatic ductal adenocarcinoma** Pancreas · Lesion](https://durgical.com/en/general-pathology/pancreatic-ductal-adenocarcinoma/) - [**Pancreatic neuroendocrine tumours** Endocrine system · Lesion](https://durgical.com/en/general-pathology/pancreatic-neuroendocrine-tumours/) - [**Panniculitis** Skin · Lesion](https://durgical.com/en/general-pathology/panniculitis/) - [**Papillary thyroid carcinoma** Endocrine system · Lesion](https://durgical.com/en/general-pathology/papillary-thyroid-carcinoma/) - [**Papillary, chromophobe and the rarer renal cell carcinomas** Kidney · Lesion](https://durgical.com/en/general-pathology/papillary-chromophobe-and-the-rarer-renal-cell-carcinomas/) - [**Paraneoplastic syndromes: the table to know** Neoplasia · Topic](https://durgical.com/en/general-pathology/paraneoplastic-syndromes-the-table-to-know/) - [**Parasitic brain infections** Central nervous system · Lesion](https://durgical.com/en/general-pathology/parasitic-brain-infections/) - [**Parkinson disease and Lewy body disorders** Central nervous system · Lesion](https://durgical.com/en/general-pathology/parkinson-disease-and-lewy-body-disorders/) - [**Paroxysmal nocturnal haemoglobinuria** Red cells and bleeding disorders · Lesion](https://durgical.com/en/general-pathology/paroxysmal-nocturnal-haemoglobinuria/) - [**Pathologic calcification: dystrophic vs metastatic** Cell injury, adaptation and death · Lesion](https://durgical.com/en/general-pathology/pathologic-calcification-dystrophic-vs-metastatic/) - [**Pathology after angioplasty, stents and grafts** Blood vessels · Process](https://durgical.com/en/general-pathology/pathology-after-angioplasty-stents-and-grafts/) - [**Pathways of spread and the usual metastatic sites** Neoplasia · Topic](https://durgical.com/en/general-pathology/pathways-of-spread-and-the-usual-metastatic-sites/) - [**Patterns of acute inflammation: serous, fibrinous, purulent, abscess, ulcer** Inflammation · Lesion](https://durgical.com/en/general-pathology/patterns-of-acute-inflammation-serous-fibrinous-purulent-abscess-ulcer/) - [**Patterns of glomerular injury** Kidney · Lesion](https://durgical.com/en/general-pathology/patterns-of-glomerular-injury/) - [**Patterns of hepatocyte injury** Liver and gallbladder · Lesion](https://durgical.com/en/general-pathology/patterns-of-hepatocyte-injury/) - [**Patterns of necrosis: coagulative, liquefactive, caseous, fat, fibrinoid, gangrenous** Cell injury, adaptation and death · Lesion](https://durgical.com/en/general-pathology/patterns-of-necrosis-coagulative-liquefactive-caseous-fat-fibrinoid-gangrenous/) - [**Pelvic inflammatory disease** Female genital tract · Lesion](https://durgical.com/en/general-pathology/pelvic-inflammatory-disease/) - [**Pemphigus** Skin · Lesion](https://durgical.com/en/general-pathology/pemphigus/) - [**Penile tumours** Lower urinary tract and male genital system · Lesion](https://durgical.com/en/general-pathology/penile-tumours/) - [**Peptic ulcer** Gastrointestinal tract · Lesion](https://durgical.com/en/general-pathology/peptic-ulcer/) - [**Pericardial disease** Heart · Lesion](https://durgical.com/en/general-pathology/pericardial-disease/) - [**Perinatal brain injury** Central nervous system · Lesion](https://durgical.com/en/general-pathology/perinatal-brain-injury/) - [**Peripheral nerve injury: axonal vs demyelinating** Peripheral nerve and skeletal muscle · Mechanism](https://durgical.com/en/general-pathology/peripheral-nerve-injury-axonal-vs-demyelinating/) - [**Pheochromocytoma and paraganglioma** Endocrine system · Lesion](https://durgical.com/en/general-pathology/pheochromocytoma-and-paraganglioma/) - [**Pigments in tissue: lipofuscin, hemosiderin, melanin, bilirubin, carbon** Cell injury, adaptation and death · Lesion](https://durgical.com/en/general-pathology/pigments-in-tissue-lipofuscin-hemosiderin-melanin-bilirubin-carbon/) - [**Pilocytic astrocytoma** Central nervous system · Lesion](https://durgical.com/en/general-pathology/pilocytic-astrocytoma/) - [**Pituitary neuroendocrine tumours (PitNETs): overview** Endocrine system · Lesion](https://durgical.com/en/general-pathology/pituitary-neuroendocrine-tumours-overview/) - [**Placenta previa and placenta accreta spectrum** Female genital tract · Lesion](https://durgical.com/en/general-pathology/placenta-previa-and-placenta-accreta-spectrum/) - [**Placental infections** Female genital tract · Lesion](https://durgical.com/en/general-pathology/placental-infections/) - [**Plasma cell disorders: MGUS to myeloma** White cells, lymph nodes, spleen and thymus · Topic](https://durgical.com/en/general-pathology/plasma-cell-disorders-mgus-to-myeloma/) - [**Platelet function disorders** Red cells and bleeding disorders · Lesion](https://durgical.com/en/general-pathology/platelet-function-disorders/) - [**Pleomorphic adenoma and Warthin tumour** Head and neck · Lesion](https://durgical.com/en/general-pathology/pleomorphic-adenoma-and-warthin-tumour/) - [**Pleural effusion and pneumothorax** Lung · Lesion](https://durgical.com/en/general-pathology/pleural-effusion-and-pneumothorax/) - [**Pleural tumours: mesothelioma and solitary fibrous tumour** Lung · Lesion](https://durgical.com/en/general-pathology/pleural-tumours-mesothelioma-and-solitary-fibrous-tumour/) - [**Poliomyelitis and rabies** Central nervous system · Lesion](https://durgical.com/en/general-pathology/poliomyelitis-and-rabies/) - [**Polycythaemia and polycythaemia vera** White cells, lymph nodes, spleen and thymus · Lesion](https://durgical.com/en/general-pathology/polycythaemia-and-polycythaemia-vera/) - [**Poorly differentiated and anaplastic thyroid carcinoma** Endocrine system · Lesion](https://durgical.com/en/general-pathology/poorly-differentiated-and-anaplastic-thyroid-carcinoma/) - [**Portal hypertension** Liver and gallbladder · Mechanism](https://durgical.com/en/general-pathology/portal-hypertension/) - [**Postinfectious glomerulonephritis** Kidney · Lesion](https://durgical.com/en/general-pathology/postinfectious-glomerulonephritis/) - [**Precancerous conditions: when chronic inflammation, metaplasia or hyperplasia raise the risk** Neoplasia · Topic](https://durgical.com/en/general-pathology/precancerous-conditions-when-chronic-inflammation-metaplasia-or-hyperplasia-rais/) - [**Precursors of pancreatic cancer: PanIN, IPMN, MCN** Pancreas · Process](https://durgical.com/en/general-pathology/precursors-of-pancreatic-cancer-panin-ipmn-mcn/) - [**Preeclampsia and eclampsia** Female genital tract · Mechanism](https://durgical.com/en/general-pathology/preeclampsia-and-eclampsia/) - [**Prematurity and fetal growth restriction** Paediatric pathology · Topic](https://durgical.com/en/general-pathology/prematurity-and-fetal-growth-restriction/) - [**Primary biliary cholangitis: the florid duct lesion and AMA** Liver and gallbladder · Lesion](https://durgical.com/en/general-pathology/primary-biliary-cholangitis-the-florid-duct-lesion-and-ama/) - [**Primary CNS lymphoma** Central nervous system · Lesion](https://durgical.com/en/general-pathology/primary-cns-lymphoma/) - [**Primary hyperparathyroidism** Endocrine system · Lesion](https://durgical.com/en/general-pathology/primary-hyperparathyroidism/) - [**Primary sclerosing cholangitis** Liver and gallbladder · Lesion](https://durgical.com/en/general-pathology/primary-sclerosing-cholangitis/) - [**Prion diseases** Central nervous system · Lesion](https://durgical.com/en/general-pathology/prion-diseases/) - [**Proliferative breast disease without atypia** Breast · Lesion](https://durgical.com/en/general-pathology/proliferative-breast-disease-without-atypia/) - [**Prostate cancer: pathogenesis** Lower urinary tract and male genital system · Mechanism](https://durgical.com/en/general-pathology/prostate-cancer-pathogenesis/) - [**Prostatic adenocarcinoma: Gleason and grade groups** Lower urinary tract and male genital system · Lesion](https://durgical.com/en/general-pathology/prostatic-adenocarcinoma-gleason-and-grade-groups/) - [**Pseudogout (CPPD disease)** Bones, joints and soft tissue · Lesion](https://durgical.com/en/general-pathology/pseudogout/) - [**Pseudomembranous colitis: C. difficile toxins and the volcano lesion** Gastrointestinal tract · Lesion](https://durgical.com/en/general-pathology/pseudomembranous-colitis-c-difficile-toxins-and-the-volcano-lesion/) - [**Psoriasis and seborrheic dermatitis** Skin · Lesion](https://durgical.com/en/general-pathology/psoriasis-and-seborrheic-dermatitis/) - [**Pulmonary edema: hemodynamic vs alveolar-capillary injury** Lung · Lesion](https://durgical.com/en/general-pathology/pulmonary-edema-hemodynamic-vs-alveolar-capillary-injury/) - [**Pulmonary eosinophilia** Lung · Lesion](https://durgical.com/en/general-pathology/pulmonary-eosinophilia/) - [**Pulmonary hypertension** Lung · Lesion](https://durgical.com/en/general-pathology/pulmonary-hypertension/) - [**Pulmonary neuroendocrine tumours** Lung · Lesion](https://durgical.com/en/general-pathology/pulmonary-neuroendocrine-tumours/) - [**Pulmonary thromboembolism: where it comes from and what it does** Hemodynamic disorders · Mechanism](https://durgical.com/en/general-pathology/pulmonary-thromboembolism-where-it-comes-from-and-what-it-does/) - [**Pyloric stenosis: infantile hypertrophic and acquired** Gastrointestinal tract · Lesion](https://durgical.com/en/general-pathology/pyloric-stenosis-infantile-hypertrophic-and-acquired/) ## A to Z - [A](https://durgical.com/en/general-pathology/a-z/a/) - 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