Visceral Abnormalities – 27-Jul-2006 draft



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Terminology of Developmental Abnormalities in Common Laboratory Mammals (Version 2)

Visceral Abnormalities – 27-Jul-2006 draft

Region / Organ / Structure

Observation

Code Number

Synonym or Related Term

Non-preferred Term

Definition

Note

General

Abdomen

Blood-filled

New

Intra-abdominal hemorrhage

Hemorrhagic ascites in abdomen






Effusion and accumulation of blood/ascites (watery fluid) in abdomen










Fluid-filled

10126

Ascites in abdomen













Abdominal wall

Cyst

New



















Thin

New
















Aneurysm




10125







Localized sac formed by dilatation of an artery or vein that is filled with blood







Cyst on thoracic wall




New



















Fluid-filled

New
















Subcutaneous edema

General

New

Anasarca
















Localized

New
















Subcutaneous hemorrhage




New
















Situs inversus

Abdominal

New







Mirror-image transposition of the abdominal viscera










Thoracic

New







Mirror-image transposition of the thoracic viscera










Total

10127







Mirror-image transposition of the abdominal and thoracic viscera







Thorax

Blood-filled

New

Intra-thoracic hemorrhage




Effusion and accumulation of blood/ascites (watery fluid) in thorax




Brain

Brain

Cyst

New







Discrete ‘hole’ within brain tissue










Large

New



















Misshapen

New



















Small

New
















Cerebellar lobe

Absent

New










May be further defined as specific structure (e.g., flocculus, paraflocculus)







Large

New



















Small

New
















Cerebellum

Discolored

New



















Hemorrhagic

10129



















Large

New



















Misshapen

10132



















Small

10134
















Cerebral hemisphere

Large

New



















Small

New
















Cerebrum

Discolored

New



















Hemorrhagic

10130



















Large

New



















Misshapen

10133



















Small

10135
















Fourth ventricle

Dilated

New







Slight to moderate dilatation of fourth ventricle

Also see hydrocephaly




Hydrocephaly

External

New







Marked increase in space between brain and skull










Internal

20131







Excessive cerebrospinal fluid within the skull. Marked dilatation of ventricle(s)

Also see dilated third and fourth ventricles

Brain - continued

Lateral ventricle

Dilated

10128

Dilated cerebral ventricle, Large lateral ventricle




Slight to moderate dilatation of lateral ventricles

Involvement of anterior portion of lateral ventricle, within olfactory lobe, may also be noted; also see hydrocephaly




Olfactory lobe

Absent

New










To be used when laterality of absent lobe cannot be determined







Single

New
















Perimeningeal space

Large

New







Slight to moderate increase in space between brain and skull

May be due to processing artifact







Hemorrhagic

New

Subdural hemorrhage




Blood between brain and skull

Not to be confused with blood within dural sinus




Pineal gland

Large

New



















Small

New
















Pituitary gland

Absent

New












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