Difference between revisions of "Ditzels"
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The challenge in ditzels is not falling asleep... so one misses the unexpected (subtle) tumour. | The challenge in ditzels is not falling asleep... so one misses the unexpected (subtle) tumour. | ||
= | =The big table of ditzels= | ||
= | {| class="wikitable sortable" | ||
! Specimen | |||
! System | |||
! Comment | |||
|- | |||
| [[Hernia sac]] | |||
| [[Gastrointestinal pathology]] | |||
| hernia | |||
|- | |||
| [[Stoma]] | |||
| [[Gastrointestinal pathology]] | |||
| stoma reversal | |||
|- | |||
| [[Sleeve gastrectomy]] | |||
| [[Gastrointestinal pathology]] | |||
| obesity | |||
|- | |||
| [[Vertebral disc]] | |||
| [[Neuropathology]] | |||
| herniated disc | |||
|- | |||
| [[Bands of Ladd]] | |||
| [[Paediatric pathology]] | |||
| | |||
|- | |||
| [[Cholesteatoma]] | |||
| [[Paediatric pathology]] | |||
|- | |||
| [[Femoral head]] | |||
| Orthopaedic | |||
| [[hip fracture]], hip [[osteoarthritis|OA]] | |||
|- | |||
| [[Bone reamings]] | |||
| Orthopaedic | |||
| | |||
|- | |||
| [[Tonsil]] | |||
| [[Head and neck pathology]] | |||
| tonsilitis | |||
|- | |||
| [[Leg amputation]] | |||
| [[Cardiovascular pathology]] | |||
| [[atherosclerosis]] | |||
|- | |||
| [[Lipoma]] | |||
| [[Soft tissue pathology]] | |||
| | |||
|- | |||
| [[Heterotopic ossification]] | |||
| [[Soft tissue pathology]] | |||
| contractures | |||
|- | |||
| [[Tubal ligation]] | |||
| [[Gynecologic pathology]] | |||
| completed family | |||
|- | |||
| [[Pressure ulcer]] ([[AKA]] decubitus ulcer) | |||
| [[Dermatopathology]] | |||
| | |||
|- | |||
| [[Vasectomy]] | |||
| [[Genitourinary pathology]] | |||
| completed family | |||
|} | |||
=Gastrointestinal pathology= | =Gastrointestinal pathology= | ||
Revision as of 02:39, 12 December 2012
This article collects ditzels, which are, in the context of pathology, little specimens that are typically one or two slides and usually of little interest.[1]
The challenge in ditzels is not falling asleep... so one misses the unexpected (subtle) tumour.
The big table of ditzels
| Specimen | System | Comment |
|---|---|---|
| Hernia sac | Gastrointestinal pathology | hernia |
| Stoma | Gastrointestinal pathology | stoma reversal |
| Sleeve gastrectomy | Gastrointestinal pathology | obesity |
| Vertebral disc | Neuropathology | herniated disc |
| Bands of Ladd | Paediatric pathology | |
| Cholesteatoma | Paediatric pathology | |
| Femoral head | Orthopaedic | hip fracture, hip OA |
| Bone reamings | Orthopaedic | |
| Tonsil | Head and neck pathology | tonsilitis |
| Leg amputation | Cardiovascular pathology | atherosclerosis |
| Lipoma | Soft tissue pathology | |
| Heterotopic ossification | Soft tissue pathology | contractures |
| Tubal ligation | Gynecologic pathology | completed family |
| Pressure ulcer (AKA decubitus ulcer) | Dermatopathology | |
| Vasectomy | Genitourinary pathology | completed family |
Gastrointestinal pathology
Hernia sac
General
- Hernia repair.
- Pathologic findings are very unusual and if present known to the surgeon.
Microscopic
Features:
- Fibrous tissue.
- +/-Adipose tissue.
- +/-Mesothelial cells.
Notes:
- One should not see vas deferens.
- Things worthy of some comment: granulation tissue, inflammation.
Sign out
Incarcerated without mesothelium
SOFT TISSUE ("HERNIA SAC"), RESECTION/HERNIA REPAIR:
- FIBROADIPOSE TISSUE WITH FAT NECROSIS -- CONSISTENT WITH HERNIA SAC.
- NEGATIVE FOR MALIGNANCY.
Micro
The sections show fibrofatty tissue with hemosiderin-laden macrophages, plump activated fibroblasts with pale staining nuclei, histiocytes with small nuclei and abundant grey vacuolated cytoplasm, fat necrosis and focal necrosis of the fibrous tissue.
Mesothelial lining present
SOFT TISSUE ("HERNIA SAC"), RESECTION/HERNIA REPAIR:
- FIBROADIPOSE TISSUE PARTIALLY COVERED BY MESOTHELIUM -- CONSISTENT WITH HERNIA SAC.
- NEGATIVE FOR MALIGNANCY.
Inflamed
SOFT TISSUE ("HERNIA SAC"), LEFT, RESECTION/HERNIA REPAIR:
- FIBROADIPOSE TISSUE PARTIALLY COVERED BY MESOTHELIUM WITH FOCAL CHRONIC
INFLAMMATION AND REACTIVE CHANGES -- CONSISTENT WITH HERNIA SAC.
- NEGATIVE FOR MALIGNANCY.
Stoma
- See: Colon and Small intestine.
General
- Reversal of ileostomy or colostomy.
Stomas are done for a number of reasons:
- Perforated viscous/peritonitis.
- Trauma.
- Colorectal adenocarcinoma.
- Diverticulosis.
Microscopic
Features:
- Colonic-type or small intestinal-type bowel wall.
- Lymphoid hyperplasia (abundant lymphocytes) - very common.
- +/-Fibromuscular hyperplasia of the lamina propria and submucosa.
- Skin.
Notes:
- One is looking for malignancy (e.g. colorectal carcinoma), especially if that is in the history.
DDx:
Sign out
COLOSTOMY, COLOSTOMY REVERSAL: - LARGE BOWEL WALL WITH SUBMUCOSAL FIBROSIS -- OTHERWISE WITHIN NORMAL LIMITS. - SKIN WITHOUT SIGNIFICANT PATHOLOGY. - NEGATIVE FOR DYSPLASIA AND NEGATIVE FOR MALIGNANCY.
Vagus nerve
General
- Seen from vagotomy.
Typical indication:
- Gastric outlet obstruction.[4]
Notes:
- Left vagus nerve -> anterior vagal trunk.
- Right vagus nerve -> posterior vagal trunk.
Microscopic
Features:
- Peripheral nerve.
DDx:
- Smooth muscle.
IHC
- S-100 +ve.
- Desmin -ve.
Sign out
A. VAGUS NERVE, POSTERIOR, VAGOTOMY: - PERIPHERAL NERVE WITHIN NORMAL LIMITS. B. VAGUS NERVE, ANTERIOR, VAGOTOMY: - SMOOTH MUSCLE WITHIN NORMAL LIMITS. - PERIPHERAL NERVE NOT IDENTIFIED, SEE COMMENT. COMMENT: The tissue was stained with desmin and S-100; it is positive for desmin. S-100 marks only small nerves fibres that innervate the muscle.
Pediatric
Bands of Ladd
General
- Associated with intestinal malrotation.
- Removed by Ladd's procedure.
Microscopic
Features:
- Benign fibrous tissue.
Cholesteatoma
General
- Squamous epithelium in the middle ear - leading to accumulation of keratinaceous debris.[5]
Microscopic
Features:[8]
- Keratinaceous debris - key feature.
- Squamous epithelium.
- Macrophages +/- giant cell (containing keratinceous debris).
- Chronic inflammation (lymphocytes).
DDx:
- Cholesterol granuloma.[9]
Genitourinary pathology
Foreskin
Main article: Penis
General
Indications:
Main considerations:
- Squamous cell carcinoma.
- Lichen sclerosus, AKA balanitis xerotica obliterans.
- Lichen planus.
- Infection, e.g. syphilis.
Microscopic
Features:
- Usu. fibrotic dermis.
- +/-Inflammation.
DDx:
- See Penis.
Paraurethral cyst
General
- Rare.
- Benign.
Clinical:[10]
- Presentation: mass lesion, dyspareunia or dysuria.
- Multipareous.
Microscopic
Features:
- Cystic space with epithelial lining - diagnosis based on epithelial lining.
- Epithelial inclusion cyst.
- Müllerian cyst.
- Gartner duct cyst (AKA mesonephric duct cyst AKA Wolffian duct cyst).[13]
- Skene duct cyst.
Head and neck pathology
Tonsillitis
- Tonsil redirects here.
General
- Commonly removed (tonsillectomy) when enlarged.
- Very low probability of malignancy (<0.2%) in tonsilectomies in individuals <19 years old if no clinical suspicion.[14]
Gross
- Symmetrical and equal size.
Note:
- Gross exam is considered sufficient if there is no asymmetry.[15]
Microscopic
Features:
- Follicular hyperplasia - see lymph node pathology.
- +/-Colonies (clusters) of actinomycetes in the tonsillar crypts.
DDx:
Sign out
A. TONSIL, LEFT, TONSILLECTOMY: - REACTIVE FOLLICULAR HYPERPLASIA. - REACTIVE SQUAMOUS MUCOSA. B. TONSIL, RIGHT, TONSILLECTOMY: - REACTIVE FOLLICULAR HYPERPLASIA. - REACTIVE SQUAMOUS MUCOSA.
Without squamous mucosa
A. TONSIL, LEFT, TONSILLECTOMY: - REACTIVE FOLLICULAR HYPERPLASIA. B. TONSIL, RIGHT, TONSILLECTOMY: - REACTIVE FOLLICULAR HYPERPLASIA.
Cardiovascular pathology
Main article: Cardiovascular pathology
Vascular thrombus
- Venous thrombus and arterial thrombus redirect here.
General
- Uncommonly comes to pathology.
Risk factors - think Virchow's triad:
- Stasis, e.g. atrial fibrillation.
- Hypercoagulable states, e.g. cancer - see risks factors venous thromboembolism.
- Endothelial injury.
Gross
- See pulmonary embolism.
Features:
- Dull appearance.
- Laminations.
Microscopic
Features:
- Layers consisting of platelets and fibrin.
- Classically alternating with layers of RBCs - known as Lines of Zahn.[17]
Note:
- Multiple laminations (layers), in general, suggest that clot was formed in a dynamic environment, i.e. in the context of blood flow.
DDx:
- Tumour embolus.
- Thromboembolus.
- Fat embolism.
- Amniotic fluid embolus.
- Foreign body.
Images:
- www:
- WC:
Sign out
BLOOD CLOT, LEFT ILIAC ARTERY, THROMBECTOMY: - THROMBUS. - NEGATIVE FOR MALIGNANCY.
Micro
The sections show layers of red blood cells alternating with fibrin and white blood cells (Lines of Zahn).
Leg amputation
Overview
Comes in two basic flavours:
- Above the knee ampuation (AKA).
- Below the knee ampuation (BKA).
Etiology:
- Diabetes mellitus - most common - see atherosclerotic peripheral vascular disease.
- Trauma.
- Infection - see chronic osteomyelitis.
- Drug use, e.g. cocaine.[18]
Atherosclerotic peripheral vascular disease
Main article: Atherosclerosis
General
- Very strong association with diabetes mellitus.
Gross
- +/-Ulceration.
- +/-Gangrene - black skin - subclassified:
- "Wet" = moist/oozing fluid.
- "Dry" = shriveled, no moisture apparent.
- +/-Loss of hair.
DDx - gross:
Image:
Sections - grossing:
- Resection margin (check for viability).
- Gangrenous area.
- Blood vessels.
- Bone (check for osteomyelitis).
Microscopic
Features:
- Atherosclerosis.
- Coagulative necrosis (gangrene).
- Inflammation (wet gangrene).
- Neutrophils.
- Lymphocytes.
- Plasma cells.
- +/-Thrombosis.
- +/-Chronic osteomyelitis.
- +/-Reactive fibroblasts.
Note:
- Ischemia may be associated with marked nuclear changes. Uninitiated eyes may think they are seeing a sarcoma.
DDx:
- Vasculitis associated with a connective tissue disorder.
- Drug use, e.g. cocaine.[18]
- Chronic osteomyelitis.
Sign out
LEFT LEG, BELOW KNEE AMPUTATION: - MODERATE-TO-SEVERE ATHEROSCLEROSIS. - COAGULATIVE NECROSIS OF SOFT TISSUE. - NECROTIC BONE. - MARROW CAVITY FIBROSIS WITH SIDEROPHAGES. - RESECTION MARGIN WITH VIABLE TISSUE.
Orthopaedic
Femoral head
Main article: Femoral head
Bone reamings
General
- Taken during the surgical repair of a fracture, e.g. intramedullary nail placement.
- Done to rule-out a pathologic fracture; considered reliable for detecting malignancy.[19]
- Hassan et al.[20] advocate against their use, suggesting the yield is low and a biopsy should be preferred.
Microscopic
Features:[21]
- Fragments of bone (scattered trabeculae).
- Necrotic bone = bone with empty lacunae, i.e. lacunae missing osteocytes.
- Bone marrow.
- Megakaryocytes - large cells, multinucleated, eosinophilic cytoplasm.
- Nucleated RBCs - perfectly round, dense nucleus, bright red cytoplasm.
- Myeloid cells and precursors.
- Adipocytes.
DDx:
- Metastatic carcinoma.
Sign out
BONE, LEFT FEMUR, REAMINGS: - FEATURES CONSISTENT WITH A RECENT FRACTURE. - NEGATIVE FOR MALIGNANCY.
Heterotopic ossification
- Abbreviated HO.
General
- Definition of heterotopic ossification: bone formation in soft tissue.[22]
- Injury at site.
- May be seen in the context of tetraplegia.
Clinical:[22]
- +/-Joint stiffness.
- +/-Swelling.
- +/-Pain.
Microscopic
Features:
- Lamellar bone - has layering/lines (best seen with polarized light).
- +/-Skeletal muscle (within the marrow space).
DDx:
- Myositis ossificans - inflammation, cellular.
- Osteosarcoma, extraskeletal.
Sign out
LESION ("HETEROTOPIC OSSIFICATION"), RIGHT FEMUR, EXCISION:
- BONE -- CONSISTENT WITH MUSCLE HETEROTOPIC OSSIFICATION.
- NEGATIVE FOR MALIGNANCY.
Micro
The sections show laminar bone with a marrow space containing adipose tissue and benign skeletal muscle. The osteocytes show no nuclear atypia. No mitotic activity is appreciated.
See also
References
- ↑ Weedman Molavi, Diana (2008). The Practice of Surgical Pathology: A Beginner's Guide to the Diagnostic Process (1st ed.). Springer. pp. 37. ISBN 978-0387744858.
- ↑ Siddiqui K, Nazir Z, Ali SS, Pervaiz S (February 2004). "Is routine histological evaluation of pediatric hernial sac necessary?". Pediatr. Surg. Int. 20 (2): 133–5. doi:10.1007/s00383-003-1106-2. PMID 14986035.
- ↑ Partrick DA, Bensard DD, Karrer FM, Ruyle SZ (July 1998). "Is routine pathological evaluation of pediatric hernia sacs justified?". J. Pediatr. Surg. 33 (7): 1090–2; discussion 1093–4. PMID 9694100.
- ↑ Okawada, M.; Okazaki, T.; Takahashi, T.; Lane, GJ.; Yamataka, A. (2009). "Gastric outlet obstruction possibly secondary to ulceration in a 2-year-old girl: a case report.". Cases J 2 (1): 8. doi:10.1186/1757-1626-2-8. PMID 19123936.
- ↑ URL: http://www.harrisonspractice.com/practice/ub/view/Harrisons%20Practice/141015/all/otitis_media_and_mastoiditis. Accessed on: 16 March 2011.
- ↑ Piepergerdes MC, Kramer BM, Behnke EE (March 1980). "Keratosis obturans and external auditory canal cholesteatoma". Laryngoscope 90 (3): 383–91. PMID 7359960.
- ↑ Shire JR, Donegan JO (September 1986). "Cholesteatoma of the external auditory canal and keratosis obturans". Am J Otol 7 (5): 361–4. PMID 3538893.
- ↑ Iino Y, Toriyama M, Ohmi S, Kanegasaki S (1990). "Activation of peritoneal macrophages with human cholesteatoma debris and alpha-keratin". Acta Otolaryngol. 109 (5-6): 444–9. PMID 1694387.
- ↑ URL: http://path.upmc.edu/cases/case273/dx.html. Accessed on: 14 January 2012.
- ↑ Isen, K.; Utku, V.; Atilgan, I.; Kutun, Y. (Aug 2008). "Experience with the diagnosis and management of paraurethral cysts in adult women.". Can J Urol 15 (4): 4169-73. PMID 18706145.
- ↑ Satani, H.; Yoshimura, N.; Hayashi, N.; Arima, K.; Yanagawa, M.; Kawamura, J. (Mar 2000). "[A case of female paraurethral cyst diagnosed as epithelial inclusion cyst].". Hinyokika Kiyo 46 (3): 205-7. PMID 10806582.
- ↑ Das, SP. (Jul 1981). "Paraurethral cysts in women.". J Urol 126 (1): 41-3. PMID 7195943.
- ↑ URL: http://webpathology.com/image.asp?n=3&Case=540. Accessed on: 5 February 2012.
- ↑ PMID 15963574.
- ↑ PMID 14608541.
- ↑ Wang, XY.; Wu, N.; Zhu, Z.; Zhao, YF. (May 2010). "Computed tomography features of enlarged tonsils as a first symptom of non-Hodgkin's lymphoma.". Chin J Cancer 29 (5): 556-60. PMID 20426908.
- ↑ Kumar, Vinay; Abbas, Abul K.; Fausto, Nelson; Aster, Jon (2009). Robbins and Cotran pathologic basis of disease (8th ed.). Elsevier Saunders. pp. 124. ISBN 978-1416031215.
- ↑ 18.0 18.1 Dhawan, SS.; Wang, BW. (Feb 2007). "Four-extremity gangrene associated with crack cocaine abuse.". Ann Emerg Med 49 (2): 186-9. doi:10.1016/j.annemergmed.2006.08.001. PMID 17059855.
- ↑ Clarke, AM.; Rogers, S.; Douglas, DL. (Dec 1993). "Closed intramedullary biopsy for metastatic disease.". J R Coll Surg Edinb 38 (6): 368-9. PMID 7509409.
- ↑ Hassan, K.; Kalra, S.; Moran, C. (Aug 2007). "Intramedullary reamings for the histological diagnosis of suspected pathological fractures.". Surgeon 5 (4): 202-4. PMID 17849954.
- ↑ Tydings, JD.; Martino, LJ.; Kircher, M.; Alfred, RH.; Lozman, J. (Mar 1987). "Viability of intramedullary canal bone reamings for continued calcification.". Am J Surg 153 (3): 306-9. PMID 3548454.
- ↑ 22.0 22.1 Leblanc, E.; Trensz, F.; Haroun, S.; Drouin, G.; Bergeron, E.; Penton, CM.; Montanaro, F.; Roux, S. et al. (Jun 2011). "BMP-9-induced muscle heterotopic ossification requires changes to the skeletal muscle microenvironment.". J Bone Miner Res 26 (6): 1166-77. doi:10.1002/jbmr.311. PMID 21611960.