Serdar Balcı
Robbins Basic Pathology
Robbins Basic Pathology
Kronik inflamatuar hücreler
Akciğerde kronik inflamasyon
Alveollerde nötrofiller
Akciğerde akut inflamasyon, akut bronkopnömoni
Damarlar konjesyone
Robbins Basic Pathology
Tekrarlayan akut dönemler
Altta yatan inflamasyonun alevlenmesi
Tekrarlayan akut kolesistit atakları sonrası safra kesesinde kronik inflamasyon
Safra kesesi, kronik inflamasyon, kronik kolesistit
Mide, kronik peptik ülser
Pathology - The Big Picture
**Pulmoner Fibrozis (idiopatik) **
Böbrek Transplant rejeksiyonu
Ksantogranülamatöz inflamasyon ve lipogranülom
**Pilonidal sinüs **
Inflammation
Stephenson, Timothy J., Underwood’s Pathology: A Clinical Approach, 9, 165-182
Makrofajlar
Lenfositler
Eozinofiller
Mast hücreleri
Inflammation
Stephenson, Timothy J., Underwood’s Pathology: A Clinical Approach, 9, 165-182
Robbins and Cotran Pathologic Basis of Disease
Kronik inflamasyonun baskın hücresi
Dolaşımdaki monositlerin dokuya geçmesinden oluşurlar
Normalde de çoğu bağ doku ve organda dağınık olarak bulunurlar
Karaciğer → Kupffer hücreleri
Dalak ve lenf nodu hilusları → histiyositler
Santral sinir sistemi → microglial hücreler
Akciğerler → Alveolar makrofajlar
Mononükleer fagositik sistem
Retiküloendotelyal sistem
Inflammation
Stephenson, Timothy J., Underwood’s Pathology: A Clinical Approach, 9, 165-182
Adhezyon molekülleri, kemokinler
Akut inflamasyondan 24-48 saat sonra dokuya geçerler
Makrofaja dönüşüm
Daha iri, daha uzun yaşam süresi, artmış fagosisitk kapasite
Kanda yaklaşık 1 gün dolaşırlar
Robbins and Cotran’s Pathological Basis of Diseases
Robbins Basic Pathology
Robbins and Cotran’s Pathological Basis of Diseases
Inflamasyonu başlatan uyaran ortadan kalktığında
Makrofajlar ölürler
Lenfatiklere geçerler
Kronik inflamatuar süreçlerde
Makrofaj birikimi devam eder
Kandan yeni gelenler, proliferasyon
IFN-γ etkisi ile birleşip, çok çekirdekli iri dev hücrelere dönüşürler
RUBINS PATHOLOGY Clinicopathologic Foundations of Medicine
Pathology - The Big Picture
Robbins Basic Pathology
Robbins and Cotran’s Pathological Basis of Diseases
Robbins and Cotran’s Pathological Basis of Diseases
Chronic peptic ulcer (a) Entire ulcer (LP) (b) Surface layers of ulcer (MP) (c) Deep layers of ulcer (MP) ( illustrations opposite ) A common example, which illustrates the principles of non-specific chronic inflammation, is the localised chronic ulceration of the stomach or duodenum, most often in individuals infected by Helicobacter pylori ( H. pylori ); such lesions are collectively referred to as chronic peptic ulcers. By definition, an ulcer extends through the full thickness of the mucosa; an erosion is a lesion involving only the superficial mucosa. Ulceration is caused by an imbalance between damaging factors (gastric acid and peptic enzymes) and protective factors (gastric mucus secretion, local secretion of alkali). H. pylori does not invade the tissues but inhabits the protective mucus layer which covers the surface of the mucosa (see Fig. 13.8 ). It has a unique ability to survive the acid environment of the stomach because of a bacter ial enzyme, urease . This allows it to produce ammonia by splitting urea, raising pH in the immediate vicinity of the organism. It typically colonises the antrum and, by producing a localised alkaline environment here, H. pylori interferes with normal physiological control of gastric acid secretion. The falsely high antral pH stimulates secretion of gastrin by the antral G cells, which acts upon the oxyntic cells in the corpus to increase acid production still further. This excess acid production overwhelms normal mucosal defence mechanisms, leading to the formation of an acute ulcer. If the process proceeds unchecked, the ulcer can burrow through the full thickness of the stomach or duodenal wall, leading to perforation and escape of gut contents into the peritoneal cavity (see Fig. 13.8 ). Often, the destructive process is arrested by an acute inflammatory response. Tissue repair then begins with the formation of granulation tissue; if conditions are favourable repair may be effective, leaving a fibrous scar. If tissue destruction continues, the concurrent organisation and repair result in chronic inflammation. A chronic peptic ulcer reflects this dynamic balance between tissue destruction and repair. A section through a chronic ulcer is shown in image (a). The ulcerated surface is covered in a slough Sl, composed of a pink-staining layer of necrotic debris combined with the fibrin and neutrophils of an acute inflammator y exudate. Beneath the slough is a zone of vascular granulation tissue V ; these features are seen at a higher magnification in micrograph (b). The next layer is a zone of fibrous granulation tissue F , seen in detail in micrograph (c). Deeper still in the ulcer base, is a fibrous scar Sc . In this deep ulcer, the muscular wall M is completely replaced by the ulcer crater, granulation tissue and scar. If a large blood vessel is present in the ulcer base, erosion into the vessel leads to bleeding into the stomach, giving rise to haematemesis (vomiting blood) or melaena (black, tar-like faeces composed of altered blood). The outcome of chronic peptic ulceration depends on whether conditions favour ongoing tissue damage or repair. If healing is favoured, fibrous tissue gradually repairs the ulcer crater and mucosa regenerates from the ulcer margins to cover the epithelial defect and protect the fibrous tissue from further damage. A healed peptic ulcer thus consists of an area of fibrous scarring replacing all or part of the thickness of the stomach wall. Internally, the regenerated mucosa is usually puckered because of contraction of the underlying scarred wall.
Chronic inflammation
Young, Barbara, BSc Med Sci (Hons), PhD, MB BChir, MRCP, FRCPA, Wheater’s Basic Pathology: A Text, Atlas and Review of Histopathology, 3, 27-36
Copyright © 2011 © 2011, Elsevier Limited
Pulmonary fibrosis (idiopathic) (a) LP (b) HP Idiopathic pulmonary fibrosis (or cryptogenic fibrosing alveolitis ) is a good example of a chronic inflammatory condition which in its earliest phases has a chronic inflammatory infiltrate. At this early stage, it may be called interstitial pneumonitis (or usual interstitial pneumonia ), where an unknown damaging agent repeatedly triggers the inflammation of the alveolar walls leading to extensive fibrosis as part of the healing process. Idiopathic pulmonary fibrosis is one of a group of disorders known as interstitial pneumonias. The later stages of this process are well illustrated in these micrographs where the alveolar walls are thickened because of the deposition of dense fibrous tissue F . The thickened alveolar walls are distorted and less permeable to gases. In the final stages, there may be great distortion of alveoli, giving rise to greatly enlarged alveolar spaces A , known as honeycomb lung (see Fig. 12.11 ). In addition, there is damage to the alveolar lining cells and these are replaced by hyperplastic or regenerating type II pneumocytes. In micrograph (b), the inflammatory infiltrate of lymphocytes and plasma cells is readily seen, as well as type 2 pneumocyte hyperplasia P. The usual presentation of cryptogenic fibrosing alveolitis is of insidious onset of breathlessness associated with finger clubbing. However, a histologically identical picture may arise as an end stage of diffuse alveolar damage owing to oxygen toxicity in premature infants, i.e. hyaline membrane disease (see Fig. 12.10 ) and acute viral pneumonitis. The condition may also follow a range of other conditions such as extrinsic allergic alveolitis, drug toxicity, miliary tuberculosis, connective tissue disorders and sarcoidosis. Some of these disorders are associated with granulomatous inflammation in the early stages and this may still be apparent at the end stage.
Chronic inflammation
Young, Barbara, BSc Med Sci (Hons), PhD, MB BChir, MRCP, FRCPA, Wheater’s Basic Pathology: A Text, Atlas and Review of Histopathology, 3, 27-36
Copyright © 2011 © 2011, Elsevier Limited
Transplant rejection: kidney (LP) Organ transplantation introduces non-self antigens into the recipient. Specifically, the HLA antigens (human leukocyte antigens) of the donor are very rarely identical to those of the recipient, except in the case of transplantation of organs between identical twins. The HLA antigens of the donor excite both antibody- and cell-mediated immune responses in the recipient in an attempt to rid the body of the foreign material by killing donor cells. This is, of course, a gross simplification of the many and complex faces of transplant rejection, which are dealt with in more detail in Chapter 15 . This micrograph illustrates a cell-mediated immune response to a transplanted kidney. There is an infiltrate of lymphocytes, most of which are T cells, in the interstitium I of the kidney. The tubules are atrophic and widely separated. Lymphocytes L can be seen within the tubular basement membrane between the tubular epithelial cells ( tubulitis ). These lymphocytes are attacking the tubular epithelial cells, causing tubular damage and eventual loss of tubules. Loss of any part of the nephron leads to loss of the entire nephron so that the transplanted kidney is unable to function. As in many cases of chronic inflammation, tissue damage is caused primarily by the inflammatory infiltrate. The transplanted kidney makes no attack on the recipient and, if left alone by the immune system, does nothing but good. Various combinations of immunosuppressant drugs are used to suppress the cell-mediated immune response to the transplanted kidney to allow it to function, thus freeing the recipient from a life of dialysis.
Chronic inflammation
Young, Barbara, BSc Med Sci (Hons), PhD, MB BChir, MRCP, FRCPA, Wheater’s Basic Pathology: A Text, Atlas and Review of Histopathology, 3, 27-36
Copyright © 2011 © 2011, Elsevier Limited
Foreign body reaction (a) Foreign body granuloma (LP) (b) Giant cell with inclusion (HP) The presence of certain non-soluble foreign materials in tissues may excite a chronic granulomatous inflammatory response, with or without discrete granuloma formation. Common examples of such foreign body reactions are those produced by suture material, wood or other vegetable matter, metal or glass splinters, and inorganic materials such as silica and beryllium, inhaled deep into the lungs during industrial dust exposure. Inhaled materials are of particular clinical importance because of their tendency to produce progressive pulmonary fibrosis, similar to that which may occur in idiopathic pulmonary fibrosis. Many of these foreign bodies are refractile when viewed with polarised light and can thus be identified within the granulomas or giant cells. At low magnification, micrograph (a) shows plant material P , derived from faeces, that has become embedded in the wall of the colon in a patient with diverticulitis . Diverticular disease is a condition where the mucosa of the bowel herniates through the muscular wall, forming a pouch or diverticulum in which faecal material may become impacted, leading to inflammation and sometimes perforation (see Ch. 13 ). The pale, incompletely digested plant material is surrounded by aggregates of foreign body giant cells F and epithelioid macrophages M as well as other inflammatory cells. At high power in micrograph (b), a fragment of plant material P can be easily seen within the cytoplasm of a Langhans’ type giant cell.
Chronic inflammation
Young, Barbara, BSc Med Sci (Hons), PhD, MB BChir, MRCP, FRCPA, Wheater’s Basic Pathology: A Text, Atlas and Review of Histopathology, 3, 27-36
Copyright © 2011 © 2011, Elsevier Limited
Bronchiectasis (LP) Bronchiectasis is a chronic inflammation of the bronchi associated with des truction of the wall and permanent dilatation. In most cases, repeated episodes of infection and obstruction lead to progressive destruction of the normal elastic and muscular components of the airway wall. Obstruction may be due to foreign bodies in bronchi, tumour, structural abnormalities or stasis of secretions, perhaps related to ciliary malfunction or cystic fibrosis. The elastic and muscular components of the bronchial wall are replaced by granulation tissue and later by fibrous tissue. This process weakens the wall, leading to dilatation of the airway, which in turn predisposes to stagnation of secretions and further episodes of bacterial infection, creating a vicious cycle. In this micrograph, two abnormal bronchi are seen, each with the lumen filled with pus P . The wall of each affected bronchus is formed of fibrovascular granulation tissue G , in which there is a heavy infiltrate of dark-staining cells, just visible at this magnification; these cells are a mixture of plasma cells and lymphocytes. Bronchiectasis exemplifies the concept of coexisting tissue damage and attempts at repair, which are the hallmarks of chronic inflammation.
Chronic inflammation
Young, Barbara, BSc Med Sci (Hons), PhD, MB BChir, MRCP, FRCPA, Wheater’s Basic Pathology: A Text, Atlas and Review of Histopathology, 3, 27-36
Copyright © 2011 © 2011, Elsevier Limited
Xanthogranulomatous inflammation and lipogranuloma (a) Xanthogranulomatous cholecystitis (MP) (b) Lipogranuloma in fat necrosis (HP) Xanthogranulomatous inflammation is a rare condition most often seen in the kidney or the gallbladder. Although rare, these are important lesions as they may form a mass that can be mistaken for a malignant tumour. Micrograph (a) shows xanthogranulomatous inflammation in the gallbladder at medium power. The lesion consists of sheets of m acrophages whose cytoplasm is loaded with droplets of lipid, thus giving it a foamy appearance. The lipid in the macrophage gives the lesion an orange-yellow appearance macroscopically. Interspersed among the foamy macrophages are lymphocytes, plasma cells, eosinophils and, sometimes, a few neutrophils. Older lesions are often very fibrotic and the gallbladder may become shrunken and thick walled. Xanthogranulomatous pyelonephritis tends to occur in patients with Proteus urinary tract infection and has similar histological appearances. Another much more common appearance is the accumulation of lipid-laden macrophages in areas where fat is released from adipocytes, often in areas of fat necrosis. Micrograph (b) shows such an area where necrotic fat cells are easily identified by their lack of nuclei. Interspersed among the fat cells are sheets of foamy macrophages, often with very few other inflammatory cells. Occasional lipogranulomas L may be seen, consisting of a droplet of lipid surrounded by foamy macrophages.
Chronic inflammation
Young, Barbara, BSc Med Sci (Hons), PhD, MB BChir, MRCP, FRCPA, Wheater’s Basic Pathology: A Text, Atlas and Review of Histopathology, 3, 27-36
Copyright © 2011 © 2011, Elsevier Limited
Giant cells (a) Foreign body giant cell (HP) (b) Langhans’ giant cell (HP) As described in the introduction, multinucleate giant cells are formed by the fusion of epithelioid macrophages and are a highly characteristic, though not universal, feature of chronic granulomatous inflammation. These micrographs illustrate typical appearances of giant cells. Micrograph (a) is a good example of a foreign body-type giant cell , which is characterised by a central group of nuclei similar to those seen in adjacent epithelioid macrophages E . These cells may be found in association with implanted foreign material, for example a remnant of a surgical suture or a rose thorn in the skin (see Fig. 3.10 ). These cells are usually found in association with epithelioid macrophages, although they may not form the discrete granulomas seen in other types of granulomatous inflammation. The second important form of giant cell is the Langhans’ giant cell , said to be characteristic of tuberculosis. As shown in micrograph (b), the multiple nuclei of Langhans’ giant cells are arranged in a horseshoe formation around the periphery. Again, epithelioid macrophages E are seen in the surrounding tissues. Both epithelioid macrophages and giant cells are specialised secretory cells, rather than phagocytic cells. The plentiful eosinophilic cytoplasm seen in both cell types is indicative of abundant rough endoplasmic reticulum, as opposed to the pale foamy cytoplasm of phagocytic macrophages. Although Langhans’ giant cells and foreign body cells are said to be more or less specific for different types of granulomatous inflammation, in practice this is not so.
Chronic inflammation
Young, Barbara, BSc Med Sci (Hons), PhD, MB BChir, MRCP, FRCPA, Wheater’s Basic Pathology: A Text, Atlas and Review of Histopathology, 3, 27-36
Copyright © 2011 © 2011, Elsevier Limited
Sarcoidosis (a) Sarcoidosis in a lymph node (MP) (b) Sarcoid granulomas (HP) Sarcoidosis is a chronic granulomatous disease of unknown aetiology, characterised by the formation of multiple discrete granulomas in many tissues. In marked distinction to classical tuberculous granulomas (see Ch. 4 ), those of sarcoidosis do not typically undergo central caseous necrosis, although small foci of necrosis may be seen in large granulomas. Sarcoidosis may occur in any organ or tissue, notably the spleen, liver, skin and lymph nodes, but frequently also involves the lungs which may be peppered with numerous granulomas. In most cases of pulmonary sarcoidosis, the hi lar lymph nodes are also grossly enlarged by masses of granulomas; such massive nodes are a useful diagnostic feature when visible on chest imaging. Micrograph (a) illustrates part of a typical lymph node. Note the scattered non-caseating granulomas G . Since there is no central mass of caseation, the sarcoid granuloma differs from the tuberculous granuloma by having a much broader zone of epithelioid macrophages. As in tuberculosis, sarcoid granulomas are surrounded by a zone of lymphocytes, although this feature is much less obvious in sarcoid lesions. In tissues other than lymph nodes, the granulomas are described as being ** **’ naked ’ , i.e. lacking a rim of lymphocytes and fibroblasts. Micrograph (b) shows a typical sarcoid granuloma at high magnification. Note the epithelioid macrophages M . Multinucleate giant cells are a feature of most of the granulomas. The cytoplasm of sarcoid giant cells may contain inclusion bodies of two types: eosinophilic star-shaped asteroid bodies A or small, laminated calcified concretions called Schaumann bodies S . In practice, these inclusion bodies are rare. Although characteristic of sarcoid giant cells, such inclusion bodies are not pathognomonic of sarcoidosis (i.e. not exclusive to sarcoidosis) and are occasionally found in other chronic inflammatory granulomas. Sarcoidosis has many possible clinical presentations, including no clinical symptoms; in persistent cases, the granulomas undergo progressive fibrosis, although some giant cells still remain. In the lungs, this may culminate in pulmonary fibrosis and honeycomb lung (see Fig. 3.6 ) and may lead to chronic respiratory failure.
Chronic inflammation
Young, Barbara, BSc Med Sci (Hons), PhD, MB BChir, MRCP, FRCPA, Wheater’s Basic Pathology: A Text, Atlas and Review of Histopathology, 3, 27-36
Copyright © 2011 © 2011, Elsevier Limited
Cells in chronic inflammation (HP) In chronic inflammation the major infiltrating cells types are macrophages , lymphocytes and plasma cells (sometimes collectively called ** **’ __ mononuclear cells __ ’ __ ) as well as eosinophils , mast cells and some neutrophils . These cells may be derived from resident tissue populations and/or migrate into the tissue from the circulating blood. As well as killing and disposing of infective organisms, inflammatory cells secrete a wide variety of soluble factors that regulate the inflammatory and healing processes. In this micrograp h, plasma cells P are identified by their amphophilic (purple) cytoplasm and eccentric __ ’ clock face ’ __ nuclei. Plasma cells are differentiated B lymphocytes that are committed to antibody production. Lymphocytes L are seen as dark, rounded nuclei with a thin, almost invisible, rim of basophilic cytoplasm. These are the effector cells of the specific immune response and include both helper and cytotoxic T cells as well as B cells. Macrophages Ma are recognised by their oval or kidney-bean-shaped nuclei and pale cytoplasm. Eosinophils E have bilobed nuclei and brightly eosinophilic granules in their cytoplasm. When stimulated, eosinophils release their granule contents, including major basic protein, a substance that is effective in killing parasites. Some neutrophils and many active fibroblasts Fi are commonly also found in chronic inflammation. Fibroblasts secrete the components of the extracellular matrix including collagen. When the damaging stimulus has been removed and repair is completed, often after weeks or months, these cells progressively disappear from the tissue.__
Chronic inflammation
Young, Barbara, BSc Med Sci (Hons), PhD, MB BChir, MRCP, FRCPA, Wheater’s Basic Pathology: A Text, Atlas and Review of Histopathology, 3, 27-36
Copyright © 2011 © 2011, Elsevier Limited
Pilonidal sinus (LP) A common example of a chronic abscess is the pilonidal sinus. In this condition, a chronic subcutaneous abscess forms, most commonly in the sacrococcygeal area. Hair shafts H , derived from locally destroyed follicles and shed body hair, are present in the abscess and act as a focus for chronic inflammation. Successful healing and repair are hindered by the persistence of the hairs which are resistant to phagocytosis. Secondary infection may further complicate the process. As part of the attempt at healing, surface epithelium proliferates and comes to line the tract leading down into the abscess cavity (not seen in this micrograph); such a tract is known as a sinus. In this micrograph, note the subcutaneous abscess cavity A , the wall of which is formed by granulation tissue G , heavily infiltrated by lymphocytes and plasma cells. There is surrounding fibrosis F in the dermis as a result of previous attempts at fibrous repair. A pilonidal sinus, like any other chronic inflammatory lesion, will only heal if the source of persistent irritation is removed; surgical excision or laying open the complex of sinuses and abscess cavities is usually the only satisfactory method in this situation.
Chronic inflammation
Young, Barbara, BSc Med Sci (Hons), PhD, MB BChir, MRCP, FRCPA, Wheater’s Basic Pathology: A Text, Atlas and Review of Histopathology, 3, 27-36
Copyright © 2011 © 2011, Elsevier Limited
RUBINS PATHOLOGY Clinicopathologic Foundations of Medicine
Robbins and Cotran’s Pathological Basis of Diseases
Granülomlardaki aktive makrofajlar
Pembe granüler sitoplazma
Belirsiz hücre sınırları
Epiteloid makrofaj kümelerini çevreleyen lenfosit agregatları by lymphocytes
Sıklıkla 40-50 μm boyutta çok çekirdekli dev hücreler
Çok sayıda aktive makrofajın birleşmesiyle oluşur
Robbins and Cotran’s Pathological Basis of Diseases
Granülomlardaki aktive makrofajlar
Pembe granüler sitoplazma
Belirsiz hücre sınırları
Pathology - The Big Picture
Robbins Basic Pathology
Hipoksi ve serbest radikal hasarı ile merkezde nekroz zonu oluşur
Eozinofilik, amorf, yapısız, granüler çöküntü, hücresel detay tümüyle kayıp
Robbins Basic Pathology
Granüler ve peynirimsi görünüm nedeniyle kazeifikasyon nekrozu
Eski ve iyileşmekte olan granülomların çevresinde fibroblast ve bağ dokudan oluşan bir sınırlayıcı doku bulunur
Autopsy Pathology: A Manual and Atlas
Robbins Basic Pathology
RUBINS PATHOLOGY Clinicopathologic Foundations of Medicine
http://phil.cdc.gov/
RUBINS PATHOLOGY Clinicopathologic Foundations of Medicine
**Foreign body reaction **
**Foreign body reaction **
RUBINS PATHOLOGY Clinicopathologic Foundations of Medicine
The granulomas associated with Crohn disease, sarcoidosis, and foreign body reactions
Do not have necrotic centers
**Noncaseating **
Robbins and Cotran’s Pathological Basis of Diseases
“Asistanlardan biri, Fransızca anlamadığıma hükmederek;”Tumeur blanche’ların ekseriya bol akıntılarla ciğer veremi tevlit edebileceğini anlatıyor. Mithat Bey ona susmasını ihtar etti.“
Peyami Safa - Dokuzuncu Hariciye Koğuşu
Sitokinler, TNF, IL-1 ve IL-6 ile kontrol edilir
Çoğunlukla karaciğerde sentezlenir (IL-6)
Akut inflamasyonda konsantrasyonları yüzlerce kat artar
C-reactive protein (CRP)
Fibrinojen
Serum amyloid A (SAA) protein