Difference between revisions of "Femoral head"

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Femoral head (view source)

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[[Image:Head of femur.jpg|thumb|right|300px|Femoral head. (WC)]]
The '''femoral head''' is a common [[ditzel]] in surgical pathology at centres which have orthopaedic surgeons.
The '''femoral head''' is a common [[ditzel]] in surgical pathology at centres which have orthopaedic surgeons.


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==Avascular necrosis of the femoral head==
==Avascular necrosis of the femoral head==
*[[AKA]] ''avascular necrosis'', abbreviated ''AVN''.
*[[AKA]] ''avascular necrosis'', abbreviated ''AVN''.
===General===
{{Main|Avascular necrosis of the femoral head}}
Risk factors:
*Oral steroids, e.g. prednisone.<ref>URL: [http://www.merckmanuals.com/professional/musculoskeletal_and_connective_tissue_disorders/osteonecrosis/osteonecrosis.html http://www.merckmanuals.com/professional/musculoskeletal_and_connective_tissue_disorders/osteonecrosis/osteonecrosis.html]. Accessed on: 30 April 2012.</ref>
*[[Cushing disease]].
*[[Cushing syndrome]].
*Radiation.
 
===Gross===
Features:<ref name=Ref_Lester224>{{Ref Lester|224}}</ref>
*Wedge-shaped pale yellow abnormality below cartilage.
*+/-Cartilage separates from the bone.
*+/-Deformation of femoral head.
 
Image:
*[http://www.flickr.com/photos/11462589@N05/1126710488/in/photostream AVN (flickr.com)].
 
===Microscopic===
Features:<ref name=pmid20513874>{{Cite journal  | last1 = Steffen | first1 = RT. | last2 = Athanasou | first2 = NA. | last3 = Gill | first3 = HS. | last4 = Murray | first4 = DW. | title = Avascular necrosis associated with fracture of the femoral neck after hip resurfacing: histological assessment of femoral bone from retrieval specimens. | journal = J Bone Joint Surg Br | volume = 92 | issue = 6 | pages = 787-93 | month = Jun | year = 2010 | doi = 10.1302/0301-620X.92B6.23377 | PMID = 20513874 }}
</ref>
*Empty lacunae (indicative of necrotic bone).
 
===Sign out===
<pre>
FEMORAL HEAD, RIGHT, HIP ARTHROPLASTY:
- AVASCULAR NECROSIS OF THE FEMORAL HEAD.
</pre>
 
====AVN and degenerative joint disease====
<pre>
FEMORAL HEAD AND JOINT CAPSULE, LEFT, HIP ARTHROPLASTY:
- AVASCULAR NECROSIS OF THE FEMORAL HEAD.
- DEGENERATIVE JOINT DISEASE WITH MILD SYNOVITIS AND VILLOUS HYPERPLASIA.
- NEGATIVE FOR MALIGNANCY.
</pre>
 
====Remote AVN====
<pre>
FEMORAL HEAD AND JOINT CAPSULE, LEFT, HIP ARTHROPLASTY:
- FEMORAL HEAD WITH DEGENERATIVE JOINT DISEASE AND MARKED DEFORMATION CONSISTENT WITH A HISTORY OF
AVASCULAR NECROSIS.
- JOINT CAPSULE WITH MINIMAL CHRONIC INFLAMMATION.
</pre>
 
=====Micro=====
The sections show a femoral head with loss of cartilage and focal vertical cleft formation in the remaining thinned cartilage. Subchondral sclerosis is present. The underlying bone is viable. Bone marrow is present. The red blood cells have a sickled morphology.
 
Joint capsule tissue with focal lymphocytes and plasma cells is present.


==Osteoarthritis==
==Osteoarthritis==
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==Fracture of bone due to metastatic carcinoma==
==Fracture of bone due to metastatic carcinoma==
{{Main|Fracture of bone}}
{{Main|Fracture of bone}}
*[[AKA]] ''pathologic fracture''.
:''Pathologic fracture'' redirects here, as the underlying cause is usually a carcinoma.
===General===
===General===
*Uncommon ~ 10 of 90 suspected cases.<ref name=pmid15826621>{{Cite journal  | last1 = Ramisetty | first1 = NM. | last2 = Pynsent | first2 = PB. | last3 = Abudu | first3 = A. | title = Fracture of the femoral neck, the risk of serious underlying pathology. | journal = Injury | volume = 36 | issue = 5 | pages = 622-6 | month = May | year = 2005 | doi = 10.1016/j.injury.2004.08.034 | PMID = 15826621 }}</ref>
*Uncommon ~ 10 of 90 suspected cases.<ref name=pmid15826621>{{Cite journal  | last1 = Ramisetty | first1 = NM. | last2 = Pynsent | first2 = PB. | last3 = Abudu | first3 = A. | title = Fracture of the femoral neck, the risk of serious underlying pathology. | journal = Injury | volume = 36 | issue = 5 | pages = 622-6 | month = May | year = 2005 | doi = 10.1016/j.injury.2004.08.034 | PMID = 15826621 }}</ref>
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===Gross===
===Gross===
*Irregular/jagged femoral neck margin.
*Irregular/jagged femoral neck margin - '''important'''.
*Hemorrhage.
*Hemorrhage.


Michael
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