Difference between revisions of "Granulomatous prostatitis"

From Libre Pathology
Jump to navigation Jump to search
(redirect for now, w/ cat.)
 
 
(24 intermediate revisions by 2 users not shown)
Line 1: Line 1:
#redirect [[Prostate_gland#Granulomatous_inflammation]]
{{ Infobox diagnosis
| Name      = {{PAGENAME}}
| Image      = Granulomatous_inflammation_of_bladder_neck.jpg
| Width      =
| Caption    = Granulomatous prostatitis. [[H&E stain]].
| Micro      = [[granuloma]]s +/- eosinophils
| Subtypes  = non-specific, post-TURP, specific, allergic
| LMDDx      = disseminated granulomatous diseases
| Stains    = [[GMS stain]], [[Ziehl-Neelsen stain]]
| IHC        =
| EM        =
| Molecular  =
| IF        =
| Gross      =
| Grossing  =
| Site      = [[prostate gland]]
| Assdx      =
| Syndromes  =
| Clinicalhx =
| Signs      =
| Symptoms  =
| Prevalence = uncommon
| Bloodwork  =
| Rads      = may be [[PI-RADS]] 4 or 5
| Endoscopy  =
| Prognosis  = dependent on underlying etiology
| Other      =
| ClinDDx    = other types of [[prostatitis]], [[prostate carcinoma]]
}}
{{ Infobox external links
| Name          = {{PAGENAME}}
| EHVSC          = 10148
| pathprotocols  =
| wikipedia      =
| pathoutlines  =
}}
'''Granulomatous prostatitis''', also known as '''prostatic granuloma''' and '''[[prostate gland]] granuloma''', is an uncommon benign finding of the prostate.
 
==General==
*Common.
*Usually secondary to BCG treatment of [[urinary bladder cancer|bladder cancer]].
*Several classifications exist<ref name=pmid17092284>{{Cite journal  | last1 = Uzoh | first1 = CC. | last2 = Uff | first2 = JS. | last3 = Okeke | first3 = AA. | title = Granulomatous prostatitis. | journal = BJU Int | volume = 99 | issue = 3 | pages = 510-2 | month = Mar | year = 2007 | doi = 10.1111/j.1464-410X.2006.06585.x | PMID = 17092284 | URL = http://onlinelibrary.wiley.com/doi/10.1111/j.1464-410X.2006.06585.x/full }}</ref> - the most commonly used is by ''Epstein & Hutchins''.
 
===Epstein & Hutchins classification===
The groupings:<ref name=pmid6432674>{{Cite journal  | last1 = Epstein | first1 = JI. | last2 = Hutchins | first2 = GM. | title = Granulomatous prostatitis: distinction among allergic, nonspecific, and post-transurethral resection lesions. | journal = Hum Pathol | volume = 15 | issue = 9 | pages = 818-25 | month = Sep | year = 1984 | doi =  | PMID = 6432674 }}</ref>
#Non-specific.
#*No cause identified, usu. incidentally discovered.
#*Most common.
#Post-[[TURP]]. ‡
#*Palisading [[granuloma]] with necrotic core (histology similar to a [[rheumatoid nodule]]<ref name=pmid6703198>{{Cite journal  | last1 = Mies | first1 = C. | last2 = Balogh | first2 = K. | last3 = Stadecker | first3 = M. | title = Palisading prostate granulomas following surgery. | journal = Am J Surg Pathol | volume = 8 | issue = 3 | pages = 217-21 | month = Mar | year = 1984 | doi =  | PMID = 6703198 }}</ref><ref>URL: [http://www.humpath.com/spip.php?article18010 http://www.humpath.com/spip.php?article18010]. Accessed on: 26 September 2012.</ref>) +/- eosinophils.
#Specific.
#*Identifiable infectious agent, usu. BCG (in the context of treating bladder cancer), rarely [[tuberculosis]] and even more rarely various [[fungi]] and [[syphilis]].
#Allergic granulomatous prostatitis.
#*Usually associated with eosinophils.
#*Examples:
#*#[[Granulomatosis with polyangiitis]] (Wegener granulomatosis).
#*#[[Eosinophilic granulomatosis with polyangiitis]] (Churg-Strauss syndrome).
 
Note:
*‡ May also be seen post-biopsy.<ref>URL: [http://webpathology.com/image.asp?n=6&Case=15 http://webpathology.com/image.asp?n=6&Case=15]. Accessed on: May 10, 2016.</ref>
 
==Gross/Imaging==
*MRI findings may mimic significant prostate cancer ([[PI-RADS]] 4 or 5).<ref name=pmid28238033>{{Cite journal  | last1 = Rais-Bahrami | first1 = S. | last2 = Nix | first2 = JW. | last3 = Turkbey | first3 = B. | last4 = Pietryga | first4 = JA. | last5 = Sanyal | first5 = R. | last6 = Thomas | first6 = JV. | last7 = Gordetsky | first7 = JB. | title = Clinical and multiparametric MRI signatures of granulomatous prostatitis. | journal = Abdom Radiol (NY) | volume = 42 | issue = 7 | pages = 1956-1962 | month = Jul | year = 2017 | doi = 10.1007/s00261-017-1080-0 | PMID = 28238033 }}</ref>
 
==Microscopic==
Features:
*[[Granulomas]] in the prostate - '''key feature'''.
**+/-Palisading granulomas with a necrotic core (similar to a [[rheumatoid nodule]]) - consistent a with prior TURP.<ref name=pmid6703198/>
*+/-Eosinophils.
 
===Images===
<gallery>
Image:Granulomatous_inflammation_of_bladder_neck.jpg | Granulomatous inflammation of the prostate/bladder neck - low mag. (WC/Nephron)
Image:Granulomatous_inflammation_of_bladder_neck_high_mag.jpg | Granulomatous inflammation of the prostate/bladder neck - high mag. (WC/Nephron)
</gallery>
 
==Stains==
*[[GMS stain]].
*[[Ziehl-Neelsen stain]].
 
Note:
*Stains are indicated when there is a suspicion of an infective etiology based on histomorphology ([[necrosis]]) or clinical information (e.g. immunosuppression).
 
==Sign out==
===Post-TURP===
<pre>
Prostate Tissue, Transurethral Resection of the Prostate (TURP):
- Benign prostatic tissue with glandular and stromal proliferation.
- Palisading granulomas with necrotic cores and scarring, see comment.
 
COMMENT:
The granuloma morphology is consistent with post-TURP changes.
</pre>
 
====Block letters====
<pre>
PROSTATE GLAND, TRANSURETHRAL RESECTION OF THE PROSTATE (TURP):
- BENIGN PROSTATIC TISSUE WITH GLANDULAR AND STROMAL PROLIFERATION.
- PALISADING GRANULOMA WITH NECROTIC CORE, SEE COMMENT.
 
COMMENT:
This is morphologically consistent with a post-TURP granuloma.
</pre>
 
===Idiopathic===
<pre>
A-L. PROSTATE GLAND,
RIGHT LATERAL SUPERIOR, RIGHT MEDIAL SUPERIOR, RIGHT LATERAL MIDZONE,
RIGHT MEDIAL MIDZONE, RIGHT LATERAL INTERIOR, RIGHT MEDIAL INFERIOR,
LEFT LATERAL SUPERIOR, LEFT MEDIAL SUPERIOR, LEFT LATERAL MIDZONE,
LEFT MEDIAL MIDZONE, LEFT LATERAL INTERIOR, LEFT MEDIAL INFERIOR,
  CORE BIOPSIES:
- BENIGN PROSTATE TISSUE;
- GRANULOMATOUS PROSTATITIS, NON-NECROTIZING, SEE COMMENT.
 
COMMENT:
Granulomatous prostatitis is usually idiopathic. Other possibilities include:
post-procedural granulomatous inflammation (e.g. post-TURP, BCG treatment),
allergic prostatitis and infections.
 
Infectious etiologies of granulomatous disease should be considered clinically.
</pre>
 
===Isolated granuloma without necrosis===
<pre>
D. PROSTATE, RIGHT MEDIAL INFERIOR, BIOPSY:
- BENIGN PROSTATE TISSUE;
- ACUTE AND CHRONIC INFLAMMATION;
- FOCAL GIANT CELLS AND AN ISOLATED GRANULOMA WITHOUT APPARENT NECROSIS.
 
COMMENT:
The granuloma (Part D) is histologically favoured to be nonspecific (as
most prostate granulomas are); however, this finding should be interpreted
within the clinical context.
</pre>
 
===Periprostatic foreign body-type===
<pre>
D. PROSTATE, RIGHT MEDIAL MIDZONE, BIOPSY:
- BENIGN PROSTATE TISSUE;
- FOREIGN BODY-TYPE GRANULOMA, NON-NECROTIZING, SEE COMMENT.
 
COMMENT:
The granuloma appears to be within the periprostatic soft tissue. It consists
of multinucleated (foreign body-type) giant cells, hyaline material, and rare
interspersed neutrophils. No necrosis is identified. This finding may represent
a reaction to displaced epithelium.
</pre>
 
==See also==
*[[Prostate gland]].
*[[Genitourinary pathology]]
 
==References==
{{Reflist|2}}


[[Category:Diagnosis]]
[[Category:Diagnosis]]
[[Category:Genitourinary pathology]]

Latest revision as of 15:19, 5 May 2019

Granulomatous prostatitis
Diagnosis in short

Granulomatous prostatitis. H&E stain.

LM granulomas +/- eosinophils
Subtypes non-specific, post-TURP, specific, allergic
LM DDx disseminated granulomatous diseases
Stains GMS stain, Ziehl-Neelsen stain
Site prostate gland

Prevalence uncommon
Radiology may be PI-RADS 4 or 5
Prognosis dependent on underlying etiology
Clin. DDx other types of prostatitis, prostate carcinoma
Granulomatous prostatitis
External resources
EHVSC 10148

Granulomatous prostatitis, also known as prostatic granuloma and prostate gland granuloma, is an uncommon benign finding of the prostate.

General

  • Common.
  • Usually secondary to BCG treatment of bladder cancer.
  • Several classifications exist[1] - the most commonly used is by Epstein & Hutchins.

Epstein & Hutchins classification

The groupings:[2]

  1. Non-specific.
    • No cause identified, usu. incidentally discovered.
    • Most common.
  2. Post-TURP. ‡
  3. Specific.
    • Identifiable infectious agent, usu. BCG (in the context of treating bladder cancer), rarely tuberculosis and even more rarely various fungi and syphilis.
  4. Allergic granulomatous prostatitis.

Note:

  • ‡ May also be seen post-biopsy.[5]

Gross/Imaging

  • MRI findings may mimic significant prostate cancer (PI-RADS 4 or 5).[6]

Microscopic

Features:

  • Granulomas in the prostate - key feature.
    • +/-Palisading granulomas with a necrotic core (similar to a rheumatoid nodule) - consistent a with prior TURP.[3]
  • +/-Eosinophils.

Images

Stains

Note:

  • Stains are indicated when there is a suspicion of an infective etiology based on histomorphology (necrosis) or clinical information (e.g. immunosuppression).

Sign out

Post-TURP

Prostate Tissue, Transurethral Resection of the Prostate (TURP):
	- Benign prostatic tissue with glandular and stromal proliferation.
	- Palisading granulomas with necrotic cores and scarring, see comment.

COMMENT:
The granuloma morphology is consistent with post-TURP changes.

Block letters

PROSTATE GLAND, TRANSURETHRAL RESECTION OF THE PROSTATE (TURP):
- BENIGN PROSTATIC TISSUE WITH GLANDULAR AND STROMAL PROLIFERATION.
- PALISADING GRANULOMA WITH NECROTIC CORE, SEE COMMENT.

COMMENT:
This is morphologically consistent with a post-TURP granuloma.

Idiopathic

A-L. PROSTATE GLAND,
 RIGHT LATERAL SUPERIOR, RIGHT MEDIAL SUPERIOR, RIGHT LATERAL MIDZONE,
 RIGHT MEDIAL MIDZONE, RIGHT LATERAL INTERIOR, RIGHT MEDIAL INFERIOR,
 LEFT LATERAL SUPERIOR, LEFT MEDIAL SUPERIOR, LEFT LATERAL MIDZONE, 
 LEFT MEDIAL MIDZONE, LEFT LATERAL INTERIOR, LEFT MEDIAL INFERIOR, 
  CORE BIOPSIES:
	- BENIGN PROSTATE TISSUE;
	- GRANULOMATOUS PROSTATITIS, NON-NECROTIZING, SEE COMMENT.

COMMENT:
Granulomatous prostatitis is usually idiopathic. Other possibilities include: 
post-procedural granulomatous inflammation (e.g. post-TURP, BCG treatment), 
allergic prostatitis and infections.

Infectious etiologies of granulomatous disease should be considered clinically.

Isolated granuloma without necrosis

D. PROSTATE, RIGHT MEDIAL INFERIOR, BIOPSY:
- BENIGN PROSTATE TISSUE;
- ACUTE AND CHRONIC INFLAMMATION;
- FOCAL GIANT CELLS AND AN ISOLATED GRANULOMA WITHOUT APPARENT NECROSIS.

COMMENT:
The granuloma (Part D) is histologically favoured to be nonspecific (as
most prostate granulomas are); however, this finding should be interpreted
within the clinical context.

Periprostatic foreign body-type

D. PROSTATE, RIGHT MEDIAL MIDZONE, BIOPSY:
- BENIGN PROSTATE TISSUE;
- FOREIGN BODY-TYPE GRANULOMA, NON-NECROTIZING, SEE COMMENT.

COMMENT:
The granuloma appears to be within the periprostatic soft tissue. It consists 
of multinucleated (foreign body-type) giant cells, hyaline material, and rare 
interspersed neutrophils. No necrosis is identified. This finding may represent 
a reaction to displaced epithelium.

See also

References

  1. Uzoh, CC.; Uff, JS.; Okeke, AA. (Mar 2007). "Granulomatous prostatitis.". BJU Int 99 (3): 510-2. doi:10.1111/j.1464-410X.2006.06585.x. PMID 17092284.
  2. Epstein, JI.; Hutchins, GM. (Sep 1984). "Granulomatous prostatitis: distinction among allergic, nonspecific, and post-transurethral resection lesions.". Hum Pathol 15 (9): 818-25. PMID 6432674.
  3. 3.0 3.1 Mies, C.; Balogh, K.; Stadecker, M. (Mar 1984). "Palisading prostate granulomas following surgery.". Am J Surg Pathol 8 (3): 217-21. PMID 6703198.
  4. URL: http://www.humpath.com/spip.php?article18010. Accessed on: 26 September 2012.
  5. URL: http://webpathology.com/image.asp?n=6&Case=15. Accessed on: May 10, 2016.
  6. Rais-Bahrami, S.; Nix, JW.; Turkbey, B.; Pietryga, JA.; Sanyal, R.; Thomas, JV.; Gordetsky, JB. (Jul 2017). "Clinical and multiparametric MRI signatures of granulomatous prostatitis.". Abdom Radiol (NY) 42 (7): 1956-1962. doi:10.1007/s00261-017-1080-0. PMID 28238033.