Evidence map›Paper›PMID 41209227›Full record

ArticleQuantitative imaging in medicine and surgery2025

Characteristic magnetic resonance imaging features of atypical spindle cell/pleomorphic lipomatous tumor.

Kojiro Onohara, Jiro Ichikawa, Hiroaki Watanabe, Keiko Hayakawa, Tomonori Kawasaki, Kaoru Aoki, Taketsugu Fujibuchi, Masanori Wako, Yoji Shido

Abstract read
In one paragraph

Article in Quantitative imaging in medicine and surgery, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors.

Kojiro OnoharaDepartment of Radiology, Interdisciplinary Graduate School of Medicine, University of Yamanashi, Yamanashi, Japan.ORCID https://orcid.org/0009-0001-1282-247X
Jiro IchikawaDepartment of Orthopaedic Surgery, Interdisciplinary Graduate School of Medicine, University of Yamanashi, Yamanashi, Japan.ORCID https://orcid.org/0000-0002-9850-6047
Hiroaki WatanabeDepartment of Radiology, Interdisciplinary Graduate School of Medicine, University of Yamanashi, Yamanashi, Japan.ORCID https://orcid.org/0000-0002-8461-6317
Keiko HayakawaDepartment of Orthopaedic Oncology, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan.ORCID https://orcid.org/0000-0003-4905-4408
Tomonori KawasakiDepartment of Pathology, Saitama Medical University International Medical Center, Saitama, Japan.
Kaoru AokiPhysical Therapy Division, School of Health Sciences, Shinshu University, Nagano, Japan.ORCID https://orcid.org/0000-0002-7050-1455
Taketsugu FujibuchiDepartment of Orthopaedic Surgery, Ehime University Graduate School of Medicine, Ehime, Japan.ORCID https://orcid.org/0000-0002-7543-4642
Masanori WakoDepartment of Orthopaedic Surgery, Interdisciplinary Graduate School of Medicine, University of Yamanashi, Yamanashi, Japan.ORCID https://orcid.org/0000-0001-6311-7909
Yoji ShidoDepartment of Orthopaedic Surgery, Hamamatsu University School of Medicine, Shizuoka, Japan.ORCID https://orcid.org/0000-0003-4170-7005

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Atypical spindle cell/pleomorphic lipomatous tumor (ASPLT) is a newly classified benign lipomatous neoplasm characterized by diverse histological features, leading to broad differential diagnoses. This study evaluated the magnetic resonance imaging (MRI) features of ASPLT to identify markers for distinguishing them from other soft tissue tumors. Nineteen patients with histologically confirmed ASPLT across multiple institutions were retrospectively evaluated. MRI features, including tumor margins, capsules, septa, fat content, hyperintense areas on T2-weighted imaging (T2WI), edema, and contrast enhancement were assessed by two experienced radiologists. Interobserver agreement was evaluated using Cohen's kappa coefficient. Fourteen men and five women [median age: 70 years; interquartile range (IQR), 62.5-74.5 years] were included, with common tumor sites including the femoral (seven) and thoracic dorsal (three) regions. The median lesion size was 90.0 mm (IQR, 48.5-135.7 mm). MRI revealed well-defined margins in 42.1% of patients, capsules in 89.5%, septa in 100%, and varied fat content. T2WI high-signal areas appeared in 94.7% of tumors. Contrast enhancement occurred in 93.8% of tumors, with 93.8% and 75% showing enhancement in fat-suppressed T2WI high- and low-signal areas, respectively. The interobserver agreement for key features ranged between moderate and good, with κ values of 0.42 for enhancement area [95% confidence interval (CI): 0.13-0.71], 0.57 for capsule presence (95% CI: 0.15-0.98), 0.60 for hyperintense areas on T2WI (95% CI: 0.35-0.85), and 0.64-0.89 for other features. Although κ=0.42 was classified as moderate, the wide confidence interval indicated variability in agreement. This study analyzed ASPLT imaging features, highlighting trends in fat and nonfatty components. ASPLT typically shows low-fat content on T1WI, T2WI high-signal areas, and varying degrees of contrast enhancement. Differential diagnoses included spindle cell lipoma, atypical lipomatous tumor/well-differentiated liposarcoma, dedifferentiated liposarcoma, and myxoid liposarcoma. Although pathological diagnosis remains crucial, recognizing imaging differences may enhance early diagnosis and treatment.

Indexed as

Atypical spindle cell/pleomorphic lipomatous tumor (ASPLT)contrast enhancementfat contentmagnetic resonance imaging (MRI)T2-weighted imaging (T2WI)

Identifiers

PMID41209227
PMCPMC12591786

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.