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| ** [[Necrosis - Pathology|Necrosis]] | | ** [[Necrosis - Pathology|Necrosis]] |
| *** Once the active phase of [[Necrosis - Pathology|necrosis]] has resolved, an irregular, disrupted shape can be created by the traction of scar tissue on adjacent tissue. | | *** Once the active phase of [[Necrosis - Pathology|necrosis]] has resolved, an irregular, disrupted shape can be created by the traction of scar tissue on adjacent tissue. |
− | ** [[Disorders of Cell Growth - Pathology#Atrophy|Atrophy]] | + | ** [[Cell Growth Disorders#Atrophy|Atrophy]] |
| ** In the lung, collapse (lack of air). | | ** In the lung, collapse (lack of air). |
| | | |
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| [[Image:consolidation and haemorrhage lung.jpg|thumb|right|150px|Consolidation and haemorrhage in the lung (Courtesy of BioMed Archive)]] | | [[Image:consolidation and haemorrhage lung.jpg|thumb|right|150px|Consolidation and haemorrhage in the lung (Courtesy of BioMed Archive)]] |
| * This colouration is commonly seen with an increase in the amount of blood- may indicate | | * This colouration is commonly seen with an increase in the amount of blood- may indicate |
− | ** [[Haemorrhage - Pathology|Haemorrhage]] | + | ** [[Haemorrhage|Haemorrhage]] |
− | *** Significant [[Haemorrhage - Pathology|haemorrhage]] is usually very dark, since the haemoglobin is depleted of oxygen. | + | *** Significant [[Haemorrhage|haemorrhage]] is usually very dark, since the haemoglobin is depleted of oxygen. |
| ** Congestion. | | ** Congestion. |
| * This colour change is most obvious in light coloured tissues due to the contrast in colour. | | * This colour change is most obvious in light coloured tissues due to the contrast in colour. |
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| ** More difficult to see in e.g. spleen. | | ** More difficult to see in e.g. spleen. |
| * If seen in a nodular lesion, the lesion may be | | * If seen in a nodular lesion, the lesion may be |
− | ** A [[Haemorrhage - Pathology#Haematoma|haematoma]]. | + | ** A [[Haemorrhage#Haematoma|haematoma]]. |
| ** A vascular lesion. | | ** A vascular lesion. |
− | ** An abscess with [[Haemorrhage - Pathology|haemorrhage]]. | + | ** An abscess with [[Haemorrhage|haemorrhage]]. |
| | | |
| ====Black or Brown/ Black==== | | ====Black or Brown/ Black==== |
| * This pigmentation may be due to | | * This pigmentation may be due to |
− | ** [[Pigmentation and Calcification - Pathology#Melanin|Melanin]] | + | ** [[Pigmentation - Pathology#Melanin|Melanin]] |
− | ** [[Pigmentation and Calcification - Pathology#Carbon (Anthracosis)|Exogenous carbon]] | + | ** [[Pigmentation - Pathology#Carbon (Anthracosis)|Exogenous carbon]] |
| ** Putrefactive bacteria | | ** Putrefactive bacteria |
− | ** [[Pigmentation and Calcification - Pathology#Haemosiderin|Haemosiderin]]. | + | ** [[Pigmentation - Pathology#Haemosiderin|Haemosiderin]]. |
| * Examples | | * Examples |
| ** If the lesion is a mass, consider a melanoma. | | ** If the lesion is a mass, consider a melanoma. |
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| *** Hydrogen sulphide from gastro-intestinal bacteria can give black discolouration | | *** Hydrogen sulphide from gastro-intestinal bacteria can give black discolouration |
| **** Known as pseudomelanosis | | **** Known as pseudomelanosis |
− | ** [[Pigmentation and Calcification - Pathology#Haemosiderin|Haemosiderosis]] (brown to golden brown). | + | ** [[Pigmentation - Pathology#Haemosiderin|Haemosiderosis]] (brown to golden brown). |
− | *** Implies old/ chronic congestion or [[Haemorrhage - Pathology|haemorrhage]]. | + | *** Implies old/ chronic congestion or [[Haemorrhage|haemorrhage]]. |
| | | |
| ====Green==== | | ====Green==== |
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| * Yellow pigmentation can be given by: | | * Yellow pigmentation can be given by: |
| ** Fat | | ** Fat |
− | ** Bile pigment (bilirubin) | + | ** Bile pigment ([[Bilirubin|bilirubin]]) |
| ** Fibrin | | ** Fibrin |
− | ** [[Oedema - Pathology#Composition of oedema fluid|Cellular exudates]] | + | ** [[Oedema#Composition of oedema fluid|Cellular exudates]] |
| ** [[Neoplasia - Pathology|Neoplasms]] | | ** [[Neoplasia - Pathology|Neoplasms]] |
| | | |
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| | | |
| * Fluid may be: | | * Fluid may be: |
− | ** [[Oedema - Pathology|'''Oedema''']] | + | ** [[Oedema|'''Oedema''']] |
| *** Clear | | *** Clear |
| ** '''Serofibrinous''' | | ** '''Serofibrinous''' |
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| ** '''Blood''' | | ** '''Blood''' |
| *** Dark red. | | *** Dark red. |
− | *** Recent [[Haemorrhage - Pathology|haemorrhage]] into the body cavities is thick, and often contains clots. | + | *** Recent [[Haemorrhage|haemorrhage]] into the body cavities is thick, and often contains clots. |
| *** Serosanguinous fluid (blood tinged oedema) is often seen at necropsy. | | *** Serosanguinous fluid (blood tinged oedema) is often seen at necropsy. |
− | **** Is much thinner than [[Haemorrhage - Pathology|haemorrhage]], and does not contain clots. | + | **** Is much thinner than [[Haemorrhage|haemorrhage]], and does not contain clots. |
| * Fluid can also accumulate post-mortem. | | * Fluid can also accumulate post-mortem. |
| | | |
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| **** [[Purulent Inflammation|Abscess]], [[Granulomatous Inflammation|granuloma]] | | **** [[Purulent Inflammation|Abscess]], [[Granulomatous Inflammation|granuloma]] |
| *** A [[Neoplasia - Pathology|neoplasm]] | | *** A [[Neoplasia - Pathology|neoplasm]] |
− | *** A [[Haemorrhage - Pathology#Haematoma|haematoma]] | + | *** A [[Haemorrhage#Haematoma|haematoma]] |
| *** A cyst. | | *** A cyst. |
| ** Considering the categories for description of the lesion should allow a ‘most-likely’ identity to be reached, or at least a short list of possibilities to be made. | | ** Considering the categories for description of the lesion should allow a ‘most-likely’ identity to be reached, or at least a short list of possibilities to be made. |