Difference between revisions of "Joints"
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A general differential diagnosis for joints is dealt with in the ''[[cartilage]]'' article. | A general differential diagnosis for joints is dealt with in the ''[[cartilage]]'' article. | ||
==Septic joint== | |||
===General=== | |||
*Uncommon. | |||
*May be treated in a one-stage ''or'' two-stage procedure.<ref name=pmid17483946>{{cite journal |author=Chen CE, Wang JW, Juhn RJ |title=Total hip arthroplasty for primary septic arthritis of the hip in adults |journal=Int Orthop |volume=32 |issue=5 |pages=573–80 |year=2008 |month=October |pmid=17483946 |pmc=2551720 |doi=10.1007/s00264-007-0366-1 |url=}}</ref> | |||
===Microscopic=== | |||
Features: | |||
*Microorganisms - '''key feature'''. | |||
*Inflammatory cells, esp. [[neutrophils]]. | |||
*+/-[[Osteomyelitis]]. | |||
==Prosthetic joint infection== | ==Prosthetic joint infection== | ||
Revision as of 16:47, 3 July 2014
Joints are important for locomotion. This article collects tidbits about their pathology.
A general differential diagnosis for joints is dealt with in the cartilage article.
Septic joint
General
- Uncommon.
- May be treated in a one-stage or two-stage procedure.[1]
Microscopic
Features:
- Microorganisms - key feature.
- Inflammatory cells, esp. neutrophils.
- +/-Osteomyelitis.
Prosthetic joint infection
General
- Bits of tissue come for frozen section to r/o infection.
- The interface membrane (not the pseudocapsule) should be sampled to obtain a high sensitivity.[2]
Microscopic
Features:
- Neutrophils - key feature.
Notes:
- Various criteria for the number of neutrophils exist (see below).[3]
- The definitions suffer from HPFitis.
- Finding of plasma cells and lymphocytes is not contributory for the diagnosis of infection.[3]
- Granulomatous inflammation that isn't of a foreign-body type should get the usual work-up.[4]
Feldman criteria
Athanasou criterion
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HEMATOMA, RIGHT HIP, IRRIGATION AFTER HIP REPLACEMENT/TISSUE REMOVAL: - FIBROADIPOSE TISSUE WITH POSTSURGICAL CHANGES INCLUDING: -- FOREIGN-BODY TYPE MULTINUCLEATED GIANT CELLS AND FOREIGN MATERIAL. -- GRANULATION TISSUE. -- FAT NECROSIS (FOCAL). - FIBRIN, BLOOD. - NEUTROPHILS IN BLOOD VESSEL WALLS/PERIVASCULAR (FOCAL), SEE COMMENT. - NEGATIVE FOR MICROORGANISMS WITH ROUTINE STAIN. COMMENT: Up to 17 neutrophils per high power field (0.55 mm field diameter) are seen.
FEMUR, LEFT, BIOPSY: - BONE MARROW WITH A PATCHY MILD FOCAL PROMINENCE OF PLASMA CELLS AND NEUTROPHILS. - FIBROUS TISSUE WITH HEMOSIDERIN, ISOLATED NEUTROPHILS AND RARE MACROPHAGES. - BONE FRAGMENTS. - NEGATIVE FOR MICROABSCESS FORMATION. - NEGATIVE FOR MICROORGANISMS WITH ROUTINE STAINS.
BONE AND SOFT TISSUE, LEFT HIP, EXCISION: - FIBROADIPOSE TISSUE, SKELETAL MUSCLE AND FRAGMENTS OF BONE WITH SURGICAL CHANGES. - NEGATIVE FOR MICROABSCESS FORMATION. - NEGATIVE FOR MICROORGANISMS WITH ROUTINE STAINS.
Juxta-articular myxoma
- Abbreviated JAM.
General
- Classically present as a mass or with pain.[5]
- May recur.
- Described as (microscopically) indistinguishable from intramuscular myxoma.[6]
Gross
Features:
- Close to large joints - classically around the knee.
- >85% of cases around the knee in one large series.[5]
Microscopic
Features:[5]
- Myxomatous stroma.
- +/-Cystic changes.
- Large nuclei with hyperchromasia and nuclear scalloping.[7]
DDx:
- Ganglion cyst.
- Intramuscular myxoma - surrounded by muscle.
Images:
Morton neuroma
Main article: Morton neuroma
Ganglion cyst
Main article: Ganglion cyst
Rheumatoid arthritis
Main article: Rheumatoid arthritis
Acute synovitis
Main article: Acute synovitis
See also
References
- ↑ Chen CE, Wang JW, Juhn RJ (October 2008). "Total hip arthroplasty for primary septic arthritis of the hip in adults". Int Orthop 32 (5): 573–80. doi:10.1007/s00264-007-0366-1. PMC 2551720. PMID 17483946. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2551720/.
- ↑ 2.0 2.1 Bori, G.; Muñoz-Mahamud, E.; Garcia, S.; Mallofre, C.; Gallart, X.; Bosch, J.; Garcia, E.; Riba, J. et al. (Apr 2011). "Interface membrane is the best sample for histological study to diagnose prosthetic joint infection.". Mod Pathol 24 (4): 579-84. doi:10.1038/modpathol.2010.219. PMID 21131917.
- ↑ 3.0 3.1 3.2 3.3 Bori, G.; Soriano, A.; García, S.; Mallofré, C.; Riba, J.; Mensa, J. (Jun 2007). "Usefulness of histological analysis for predicting the presence of microorganisms at the time of reimplantation after hip resection arthroplasty for the treatment of infection.". J Bone Joint Surg Am 89 (6): 1232-7. doi:10.2106/JBJS.F.00741. PMID 17545426.
- ↑ URL: http://path.upmc.edu/cases/case174.html. Accessed on: 8 January 2012.
- ↑ 5.0 5.1 5.2 Meis, JM.; Enzinger, FM. (Jun 1992). "Juxta-articular myxoma: a clinical and pathologic study of 65 cases.". Hum Pathol 23 (6): 639-46. PMID 1592386.
- ↑ Humphrey, Peter A; Dehner, Louis P; Pfeifer, John D (2008). The Washington Manual of Surgical Pathology (1st ed.). Lippincott Williams & Wilkins. pp. 624. ISBN 978-0781765275.
- ↑ URL: http://path.upmc.edu/cases/case38/micro.html. Accessed on: 2 January 2011.