Difference between revisions of "Leydig cell tumour"
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| Line 21: | Line 21: | ||
| Symptoms = | | Symptoms = | ||
| Prevalence = uncommon | | Prevalence = uncommon | ||
| Bloodwork = +/-elevated testosterone | | Bloodwork = +/-elevated testosterone (rarely elevated estradiol) | ||
| Rads = | | Rads = | ||
| Endoscopy = | | Endoscopy = | ||
| Prognosis = benign | | Prognosis = usu. benign | ||
| Other = | | Other = | ||
| ClinDDx = other testicular tumours | | ClinDDx = other testicular tumours | ||
| Line 35: | Line 35: | ||
*Arises from the interstitial cell. | *Arises from the interstitial cell. | ||
*May be associated with increased testosterone. | *May be associated with increased testosterone. | ||
*Can be malignant in adults.<ref name=pmid17284120>{{Cite journal | last1 = Al-Agha | first1 = OM. | last2 = Axiotis | first2 = CA. | title = An in-depth look at Leydig cell tumor of the testis. | journal = Arch Pathol Lab Med | volume = 131 | issue = 2 | pages = 311-7 | month = Feb | year = 2007 | doi = 10.1043/1543-2165(2007)131[311:AILALC]2.0.CO;2 | PMID = 17284120 | URL = http://www.archivesofpathology.org/doi/full/10.1043/1543-2165%282007%29131%5B311:AILALC%5D2.0.CO;2 }}</ref> | |||
Clinical:<ref name=pmid17284120/> | |||
*+/-Elevated testosterone. | |||
**Rarely elevated estradiol. | |||
*ACTH low. | |||
==Gross== | ==Gross== | ||
*Solid, lobulated. | *Solid, lobulated. | ||
*Red/tan. | *Red/tan. | ||
*Typically 3-5 cm.<ref name=pmid17284120/> | |||
Image: | Image: | ||
| Line 47: | Line 53: | ||
*Vacuolization (cytoplasm) - '''key feature'''. | *Vacuolization (cytoplasm) - '''key feature'''. | ||
*Cytoplasm - clear to eosinophilic - '''important'''. | *Cytoplasm - clear to eosinophilic - '''important'''. | ||
**Usually eosinophilic. | |||
*''Reinke crystals'' - classic finding, usually not present. | *''Reinke crystals'' - classic finding, usually not present. | ||
**Cylindrical crystalloid eosinophilic cytoplasmic bodies. | **Cylindrical crystalloid eosinophilic cytoplasmic bodies. | ||
| Line 55: | Line 62: | ||
*[[Spermatocytic seminoma]] - may have eosinophilic cytoplasm. | *[[Spermatocytic seminoma]] - may have eosinophilic cytoplasm. | ||
*[[Pregnancy luteoma]] - occurs during pregnancy, as the name implies. | *[[Pregnancy luteoma]] - occurs during pregnancy, as the name implies. | ||
*Leydig cell hyperplasia. | |||
*[[Granular cell tumour]].<ref name=pmid17284120/> | |||
===Images=== | ===Images=== | ||
Revision as of 04:25, 18 November 2013
| Leydig cell tumour | |
|---|---|
| Diagnosis in short | |
 Leydig cell tumour. H&E stain. | |
|
| |
| LM | cytoplasmic vacuolization, cytoplasm -- clear to eosinophilic, +/-Reinke crystals (cylindrical crystalloid -- eosinophilic cytoplasmic bodies), +/-nucleoli common, round nuclei |
| LM DDx | spermatocytic seminoma (testis only), pregnancy luteoma (females only), Sertoli-Leydig cell tumour |
| IHC | inhibin-alpha +ve, calretinin +ve, melan A +ve |
| Gross | solid, red/tan |
| Site | testis |
|
| |
| Prevalence | uncommon |
| Blood work | +/-elevated testosterone (rarely elevated estradiol) |
| Prognosis | usu. benign |
| Clin. DDx | other testicular tumours |
Leydig cell tumour, also known as interstitial cell tumour, is an uncommon benign sex cord-stromal tumour, typically seen in the testis.
Interstitial cell tumour should not be confused with renomedullary interstitial cell tumour.
General
- Arises from the interstitial cell.
- May be associated with increased testosterone.
- Can be malignant in adults.[1]
Clinical:[1]
- +/-Elevated testosterone.
- Rarely elevated estradiol.
- ACTH low.
Gross
- Solid, lobulated.
- Red/tan.
- Typically 3-5 cm.[1]
Image:
Microscopic
Features:[2]
- Vacuolization (cytoplasm) - key feature.
- Cytoplasm - clear to eosinophilic - important.
- Usually eosinophilic.
- Reinke crystals - classic finding, usually not present.
- Cylindrical crystalloid eosinophilic cytoplasmic bodies.
- Nucleoli common.
- Round nuclei.
DDx:
- Spermatocytic seminoma - may have eosinophilic cytoplasm.
- Pregnancy luteoma - occurs during pregnancy, as the name implies.
- Leydig cell hyperplasia.
- Granular cell tumour.[1]
Images
Leydig cell tumour - low mag. (WC)
Leydig cell tumour - intermed. mag. (WC)
Leydig cell tumour - high mag. (WC)
www:
IHC
- Inhibin-alpha +ve.
- Calretinin +ve.[3][4]
- Melan A +ve.[5]
- AKA MART-1.
- Expressed in melanoma, adrenal tissue, steroid-secreting tumours.
See also
References
- ↑ 1.0 1.1 1.2 1.3 Al-Agha, OM.; Axiotis, CA. (Feb 2007). "An in-depth look at Leydig cell tumor of the testis.". Arch Pathol Lab Med 131 (2): 311-7. doi:10.1043/1543-2165(2007)131[311:AILALC]2.0.CO;2. PMID 17284120.
- ↑ Zhou, Ming; Magi-Galluzzi, Cristina (2006). Genitourinary Pathology: A Volume in Foundations in Diagnostic Pathology Series (1st ed.). Churchill Livingstone. pp. 581. ISBN 978-0443066771.
- ↑ URL: http://www.antibodybeyond.com/reviews/cell-markers/leydig-cell-marker.htm. Accessed on: 18 May 2010.
- ↑ Bar-Shira Maymon B, Yavetz H, Yogev L, et al. (2005). "Detection of calretinin expression in abnormal immature Sertoli cells in non-obstructive azoospermia". Acta Histochem. 107 (2): 105–12. doi:10.1016/j.acthis.2005.02.002. PMID 15950053.
- ↑ Yao DX, Soslow RA, Hedvat CV, Leitao M, Baergen RN (September 2003). "Melan-A (A103) and inhibin expression in ovarian neoplasms". Appl. Immunohistochem. Mol. Morphol. 11 (3): 244–9. PMID 12966351.