Author, Donkey, Bureaucrats, Administrators
53,803
edits
Changes
Male External Genitalia - Pathology (view source)
Revision as of 13:41, 7 November 2011
, 13:41, 7 November 2011no edit summary
==Pathology of external genitalia==
===Pathology of external genitalia===
===Congenital abnormalities of the penis===
* '''Absence of penis''':usually seen only as part of a major whole-body malformation.
* '''Micropenis''':seen in bulls (malformation of sigmoid flexure). Also some dogs.
* '''Persistent penile frenulum''':bulls and dogs. Associated with cork screw or deviation of penis.
*CONGENITAL ANOMALIES OF PENIS
===Congenital abnormalities of the prepuce===
* '''Absence or agenesis''':may be associated with pseudo-hermaphroditism.
* '''Absence of preputial orifice''':seen in pups.
* '''Phimosis''':small preputial orifice, penis cannot be extruded from prepuce.
* '''[[Paraphimosis]]''': prepuce can be drawn behind the glans but cannot return after erection).
* '''[[Urethra - Developmental Pathology|Hypospadias/epispadius]]''':failure of anatomical closure of prepuce and/or urethra.
===Inflammation===
* '''Posthitis''':inflammation of prepuce
* '''Balanitis''':Inflammation of glans penis
* '''[[Ulcerative Balanoposthitis|Balanoposthitis]]''':usual for both to be involved
Dogs:suppuration and/or ulceration due to ''[[Escherichia coli|E. coli]], [[Proteus|Proteus]]'' or [[Haemophilus species|''Haemophilus'' spp]].
<br>Bulls:IBR virus causes ulceration which may become secondarily infected.
<br>Bulls:IBR virus causes ulceration which may become secondarily infected.
<br>Rams and wethers:occlusion of the urethral appendage as a result of calculi causing a necrotising lesion of the glans ± urethral rupture and subcutaneous leakage of urine.
<br>Rams and wethers:occlusion of the urethral appendage as a result of calculi causing a necrotising lesion of the glans ± urethral rupture and subcutaneous leakage of urine.
*NEOPLASIA
===Neoplasia===
* '''[[Bovine Papillomaviruses|Transmissible fibropapilloma]]''': seen in bulls, bovine papillomavirus type 2.
Multiple luxuriant growths, painful, easily traumatised. Transmissible to females. Spontaneous regression.
Multiple luxuriant growths, painful, easily traumatised. Transmissible to females. Spontaneous regression.
* '''[[Squamous Cell Carcinoma|Squamous cell carcinoma]]''':seen in geldings.
Less common in bulls and dogs, low-grade malignancy may ulcerate and haemorrhage.
Less common in bulls and dogs, low-grade malignancy may ulcerate and haemorrhage.
* '''[[Melanoma]]''':occurs on prepuce and scrotum of grey horses. Often benign.
* '''Transmissible venereal tumour''':seen in dogs and bitches.
* '''[[Sarcoids]]''':equine prepuce
{{Learning
|flashcards = [[Small Animal Soft Tissue Surgery Q&A 05]]}}
Information by kind permission of Professor R W Else
Information by kind permission of Professor R W Else
[[Category:To Do - Reproductive]]
[[Category:To Do - Reproductive]]
[[Category:Male Reproductive System - Pathology]]
[[Category:Male Reproductive System - Pathology]]