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2016 ; 36
(1
): 162-75
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Benign Conditions That Mimic Prostate Carcinoma: MR Imaging Features with
Histopathologic Correlation
#MMPMID26587887
Kitzing YX
; Prando A
; Varol C
; Karczmar GS
; Maclean F
; Oto A
Radiographics
2016[Jan]; 36
(1
): 162-75
PMID26587887
show ga
Multiparametric magnetic resonance (MR) imaging combines anatomic and functional
imaging techniques for evaluating the prostate and is increasingly being used in
diagnosis and management of prostate cancer. A wide spectrum of anatomic and
pathologic processes in the prostate may masquerade as prostate cancer,
complicating the imaging interpretation. The histopathologic and imaging findings
of these potential mimics are reviewed. These entities include the anterior
fibromuscular stroma, surgical capsule, central zone, periprostatic vein,
periprostatic lymph nodes, benign prostatic hyperplasia (BPH), atrophy, necrosis,
calcification, hemorrhage, and prostatitis. An understanding of the prostate
zonal anatomy is helpful in distinguishing the anatomic entities from prostate
cancer. The anterior fibromuscular stroma, surgical capsule, and central zone are
characteristic anatomic features of the prostate with associated low T2 signal
intensity due to dense fibromuscular tissue or complex crowded glandular tissue.
BPH, atrophy, necrosis, calcification, and hemorrhage all have characteristic
features with one or more individual multiparametric MR imaging modalities.
Prostatitis constitutes a heterogeneous group of infective and inflammatory
conditions including acute and chronic bacterial prostatitis, infective and
noninfective granulomatous prostatitis, and malacoplakia. These entities are
associated with variable clinical manifestations and are characterized by the
histologic hallmark of marked inflammatory cellular infiltration. In some cases,
these entities are indistinguishable from prostate cancer at multiparametric MR
imaging and may even exhibit extraprostatic extension and lymphadenopathy,
mimicking locally advanced prostate cancer. It is important for the radiologists
interpreting prostate MR images to be aware of these pitfalls for accurate
interpretation. Online supplemental material is available for this article.