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Background Lipedema is a painful subcutaneous adipose tissue (SAT) disorder that mainly affects women. Patients present fat accumulation in the limbs, especially in the legs. Methods A pilot-controlled clinical trial was conducted on a sample of 18 patients with lipedema, equally divided into a control group (CG) and an experimental group (EG). Both groups were given 10 sessions of diathermy on the inner side of their knees, 10 min of treatment per knee. EG was given the diathermy dose at high-intensity heat, while CG was given sham treatment. Measurement instruments used were circumferential measurements, ultrasound measurements, algometry, VAS, and SF-12 questionnaire. Data were collected at baseline, at the end of the study and 5 weeks later. Results significant reductions in left knee circumference were observed in the EG compared with the CG (p = 0.004 post-intervention and p = 0.017 at follow-up). No significant differences were found in ultrasound, algometry, or VAS measurements within or between groups. Conclusions High-intensity heat diathermy resulted in a reduction in knee circumference, suggesting a potential effect on limb volume.

Lipedema is a chronic adipose tissue condition that primarily affects women. Despite increasing recognition of lipedema, the condition remains poorly understood and lacks standardized diagnostic criteria or confirmatory tests. Variability in definitions and measurement across clinical and research settings impedes comparability across studies, constraining the evidence base needed to support future advances in clinical practice and patient care. To address challenges associated with inconsistent definitions and data collection, the Lipedema Foundation (LF) partnered with clinicians, researchers, and biostatisticians to develop a Lipedema Common Case Report Form (CCRF). The CCRF was designed to be a research data harmonization tool and is not intended to define diagnostic standards or guide clinical treatment decisions. Its development involved review of published lipedema clinical guidelines and collaborative work to define data elements and attributes for inclusion. When they existed, validated or standardized measures were incorporated directly. When no suitable standardized measures were available, an iterative and collaborative process was used to develop lipedema-specific Common Data Elements (CDEs). The initial version of the CCRF was piloted in participants with and without lipedema, and updates based on participant and clinician feedback were incorporated into the CCRF. A biostatistical review evaluated data completeness, quality, and structure, leading to additional refinements. The final Version 1 instrument consists of 682 CDEs organized into four classifications: (1) Core, (2) Supplemental Highly Recommended, (3) Supplemental, and (4) Exploratory. The current version is prepared for dissemination in the field. By disseminating the CCRF broadly and encouraging adoption in all lipedema research beginning in 2026, including all newly initiated LF-funded projects, LF intends to evaluate its use with grantees and iterate systematically to achieve consistent and comparable data collection. The CCRF provides a structured framework for harmonized data collection that may facilitate comparability across studies and support future development of standardized diagnostic and research methodologies.

Objectives: To examine the associations of ultra-processed food (UPF) consumption, dietary inflammatory index (DII), and Mediterranean diet adherence with pain severity, physical quality of life, body composition, and inflammatory markers in women with lipedema. Methods: This cross-sectional study included women diagnosed with lipedema across different disease stages. Dietary intake was assessed using a validated food frequency questionnaire, and foods were classified according to the NOVA system to determine UPF consumption. The dietary inflammatory index was calculated to assess the inflammatory potential of the diet, and Mediterranean diet adherence was evaluated using a standardized scoring system. Anthropometric measurements, body composition parameters, inflammatory markers, pain intensity (VAS), and physical quality of life (SF-12 PCS) were assessed. Multivariable regression analyses were performed to investigate the associations between dietary variables and clinical outcomes. Results: A total of 86 women with lipedema (stage 1: n=36, stage 2: n=33, stage 3: n=17) were included. UPF consumption increased from 28.1% to 41.3% of total energy and DII scores from +1.46 to +3.02 across stages, while Mediterranean diet adherence decreased from 28.2 to 21.3. In parallel, BMI increased from 27.1 to 31.1 kg/m² and body fat percentage from 36.7% to 41.1%. Inflammatory markers also rose across stages (hs-CRP: 3.9 to 6.1 mg/L; IL-6: 3.1 to 4.6 pg/mL). In multivariable models, higher DII scores were associated with increased pain severity (β=0.29, p=0.007) and higher hs-CRP levels (β=0.41, p<0.001), whereas Mediterranean diet adherence was positively associated with physical quality of life (β=0.34, p=0.002). Conclusion: Higher ultra-processed food consumption and dietary inflammatory potential were associated with increased inflammation, pain, and adiposity, whereas greater Mediterranean diet adherence was associated with better physical quality of life in women with lipedema.

Lipedema is a chronic adipose tissue disorder characterised by disproportionate accumulation of subcutaneous fat within specific anatomical depots, most commonly the lower extremities, with relative sparing of the trunk. Despite increasing clinical recognition, the mechanisms underlying the selective vulnerability of particular adipose depots and the progressive tissue remodelling observed in lipedema remain poorly understood. Emerging evidence suggests that lipedema is associated with complex alterations in adipocyte biology, adipose stem and progenitor cell (ASPC) function, immune signalling, vascular integrity, extracellular matrix remodelling, and lymphatic homeostasis, indicating that the disease extends beyond simple fat accumulation. Recent advances in adipose tissue biology have demonstrated that adipose depots are not functionally uniform structures, but rather anatomically distinct cellular ecosystems with unique developmental origins, transcriptional programs, stromal composition, immune niches, and metabolic properties. These depot-specific characteristics may provide an important framework for understanding the regional distribution and progression of lipedema. However, while substantial progress has been made in defining differences between visceral and subcutaneous adipose tissue, heterogeneity between individual subcutaneous depots remains comparatively underexplored despite its likely relevance to disorders of regional adipose expansion. The emergence of single-cell and spatial transcriptomic technologies has transformed the study of adipose tissue by enabling high-resolution mapping of adipocytes, stromal populations, vascular cells, and immune microenvironments within healthy and diseased tissue. These approaches offer an unprecedented opportunity to investigate depot-specific cellular states, intercellular signalling networks, and spatial tissue architecture in lipedema. In this review, we synthesise current evidence regarding tissue remodelling and adipose depot heterogeneity in lipedema and examine how single-cell and spatial omics approaches may advance mechanistic understanding of disease pathophysiology. We further discuss current technical and conceptual limitations within the field and highlight future directions for developing integrated adipose tissue atlases capable of identifying disease-driving cellular programs and therapeutic targets in lipedema.

Background: Lipedema is a chronic adipose tissue disorder with disproportionate fat accumulation in the extremities and is often misdiagnosed as obesity. Although women with lipedema appear to be metabolically distinct from body mass index (BMI)-matched controls, their fasting metabolism remains insufficiently characterized. We therefore aimed to define the metabolic signature of lipedema using serum NMR metabolomics and anthropometric profiling. Methods: We conducted a study with 24 premenopausal women with lipedema and 21 BMI-matched controls. Fasting serum samples were analyzed using NMR spectroscopy and anthropometric data were collected. Regional body composition was additionally assessed in an exploratory matched DXA subset (n=12). To characterize coordinated metabolic differences beyond single analytes, we derived exploratory composite indices and applied multivariate analyses. Results: Despite similar BMI, women with lipedema showed lower waist circumference, waist-to-hip ratio and lower fasting insulin than controls (age-adjusted p=0.032). NMR profiling revealed lower alanine (p<0.001), lactate (p=0.004), pyruvate (p=0.021), and elevated ketone bodies (3-hydroxybutyric acid: p=0.009; acetoacetic acid: p=0.035; acetone: p=0.006). These alterations were reflected by significant group differences in composite indices for fat distribution (g=1.26; p<0.001), glycolysis (g=0.74; p=0.018), and ketone metabolism (g=0.70; p=0.018). Principal component analysis of the selected indices explained 78% of the total variance and showed partial group separation between lipedema and controls. Conclusion: Lipedema is associated with a distinct fasting metabolic profile characterized by reduced glycolytic intermediates, enhanced ketone body signals, and a more peripheral fat distribution despite comparable BMI. These findings support the concept of lipedema as a metabolically distinct phenotype and suggest that multivariate metabolic signatures may help refine future diagnostic and interventional approaches.

Lipedema affects an estimated 11–12% of women worldwide and is characterized by bilateral, symmetric adipose deposition in the lower extremities, disproportionate pressure pain, spontaneous bruising, and resistance to conventional dietary interventions. Despite its prevalence, lipedema lacks a unifying mechanistic framework. Current descriptions treat it as a fat storage disorder with secondary vascular and inflammatory features, leaving critical observations mechanistically unexplained: a highly characteristic quantitative sensory testing (QST) pattern with no published alternative mechanistic explanation, a paradoxical immunological profile, a 35–40% comorbidity with fibromyalgia, a 1.42 relative risk for ADHD, estrogen-dependent onset, and asymmetric expression in the presence of local vascular triggers. We propose the gfWAT-IIT2 framework, which posits that lipedema is fundamentally a syndrome of polarization of the gluteofemoral white adipose tissue (gfWAT) microenvironment toward innate type 2 immunity (IIT2), amplified by estrogen via mast cell estrogen receptors, and generating neuropathic pain through selective histaminergic sensitization of Aδ/C fibers (H1/H4 receptors, PPT↓) and inhibition of Aβ fibers (H3 receptor, VDT↑), with thermal thresholds remaining normal: a triad that is mechanistically explained by histaminergic peripheral sensitization. The gfWAT-IIT2 framework integrates reported clinical, sensory, immunological, and depot-specific observations into a testable mechanistic cascade, generates fourteen falsifiable predictions, and repositions the therapeutic target from adipocyte to mast cell. The framework further proposes that asymmetric lipedema (where one limb expresses the disease more severely due to an identifiable local trigger) constitutes a natural controlled experiment suggesting that local trigger removal may be disease-modifying in selected patients with documented triggers.

Lipedema has long been misclassified as a cosmetic concern or a subtype of obesity, leading to delayed diagnosis and suboptimal surgical outcomes. Growing molecular, histopathologic, and imaging evidence supports lipedema as a systemic disorder involving adipose tissue, connective matrix, vascular–lymphatic integrity, and neuroimmune regulation. To integrate these findings into a clinically actionable model, we introduce the concept of Adipoconnective Fragility Syndrome (AFS), framing lipedema as a multisystem condition with direct implications for surgical planning and perioperative management.

INTRODUCTION: Lipedema is a chronic adipose tissue disorder characterized by disproportionate fat deposition, primarily in the lower extremities, leading to pain, functional impairment, and reduced quality of life. While Power-Assisted Liposuction (PAL) is the standard surgical approach, the integration of Ultrasound-Assisted Liposuction (UAL) with PAL has been proposed to enhance fat removal and improve patient outcomes. OBJECTIVE: To compare the clinical efficacy, postoperative outcomes, and complication rates of PAL alone versus UAL + PAL in patients with Stage II and III lipedema. METHODS: A retrospective cohort study was conducted on 60 female patients diagnosed with lipedema (Stage II and III). 30 patients underwent PAL alone, while 30 received UAL followed by PAL. Primary outcomes included the volume of fat aspirated, circumferential reduction, and postoperative pain, measured at multiple time points over a 12-month follow-up. Secondary outcomes assessed patient satisfaction, time to return to daily activities, and complication rates. RESULTS: The UAL + PAL group demonstrated a significantly higher mean fat extraction volume (5,500 ± 450 mL) compared to the PAL group (4,100 ± 380 mL; p < 0.01). Circumferential reduction was greater in the UAL + PAL group, with an average reduction of 12.5 cm versus 8.2 cm in the PAL group (p < 0.01). Postoperative pain, assessed using a Visual Analog Scale (VAS), was significantly lower in the UAL + PAL group (VAS 4.5 ± 0.7) compared to the PAL group (VAS 6.2 ± 0.8 at 24 hours post-surgery; p < 0.01). Additionally, patients treated with UAL + PAL reported a faster return to daily activities (9.3 ± 1.8 days vs. 12.8 ± 2.1 days; p < 0.01) and higher satisfaction scores (4.8 ± 0.5 vs. 4.2 ± 0.6 on a 5-point Likert scale; p < 0.05). Complication rates were comparable between the two groups, with no major adverse events reported. CONCLUSION: UAL + PAL offers significant advantages over PAL alone in the surgical management of lipedema, providing superior fat removal, reduced postoperative pain, faster recovery, and improved patient satisfaction. These findings support the integration of UAL into standard liposuction protocols for advanced-stage lipedema, emphasizing its efficacy in overcoming the challenges posed by fibrotic adipose tissue. LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .

Lymphedema and Lipedema are chronic disorders that are often misdiagnosed, leading to complications ranging from infection to impaired mobility. While the genetic basis of lymphedema is well characterized, the genetic contributions to lipedema remain unclear despite clear familial hereditary patterns. This review examines current knowledge on the genetic foundations of both conditions, examining established causative genes in lymphedema and emerging evidence of heritability in lipedema. It also evaluates the role of genetic testing in diagnosis and classification. By emphasizing established findings and highlighting ongoing gaps, this review supports efforts to refine diagnosis and guide therapeutic development.

Lipedema is a chronic and progressive adipose tissue disorder characterized by disproportionate fat accumulation, microvascular dysfunction, chronic inflammation, and progressive fibrosis. Despite its prevalence and significant impact on quality of life, current therapeutic approaches remain largely symptomatic and fail to address the underlying biological mechanisms of the disease. Emerging evidence suggests that lipedema should be understood as a multifactorial condition involving genetic susceptibility, endothelial alterations, immune dysregulation, and extracellular matrix remodeling. In this context, pharmacological strategies targeting these pathways have gained increasing attention. Metformin, through activation of AMP-activated protein kinase (AMPK), exerts antifibrotic and immunometabolic effects, including inhibition of TGF-β signaling, reduction of extracellular matrix deposition, and modulation of adipose tissue inflammation. In parallel, incretin-based therapies, particularly glucagon-like peptide-1 (GLP-1) receptor agonists and dual GLP-1/GIP agonists such as tirzepatide, have demonstrated pleiotropic effects that extend beyond weight reduction, including improvements in metabolic homeostasis, reduction of systemic inflammation, and enhancement of endothelial function. These therapies appear to act through complementary mechanisms, with metformin primarily targeting tissue remodeling and fibrosis, and incretin-based therapies exerting broader systemic effects on metabolism, inflammation, and vascular integrity. This review proposes a hypothesis-generating mechanistic framework, supporting a shift from weight-centric and symptomatic approaches toward disease-modifying strategies. Although current evidence in lipedema is largely indirect, the convergence of experimental and clinical data provides a strong rationale for further investigation. Future studies should focus on evaluating combined therapeutic approaches and identifying biomarkers that reflect fibrosis, inflammation, and microvascular dysfunction, with the aim of developing targeted and personalized treatments for this complex disorder.

Lipedema is a chronic, multifactorial disorder characterized by connective tissue dysregulation, in which vascular dysfunction plays a significant role. Lipedema manifests as symmetrical, painful accumulation of adipose tissue, predominantly in the lower body and arms, with progressive pain, tissue heaviness, and soft-tissue changes across disease stages. Emerging evidence from the micro-to macro-scale implicates endothelial dysfunction, aberrant angiogenesis, and vessel fragility in the pathological accumulation of interstitial fluid leading to tissue edema. Vascular changes are compounded with extracellular matrix remodeling in the form of adipose tissue expansion and fibrosis. Immune cell infiltration and chronic inflammation further contribute to tissue stiffening and adipose hypertrophy, highlighting the role of immune-mediated mechanisms in disease progression. The interplay between vascular, lymphatic, connective tissue, and immune dysfunction emerges as a central determinant of lipedema pathophysiology. Understanding these interconnected mechanisms is critical for elucidating the fundamental biology of lipedema, identifying novel biomarkers, and guiding the development of translational interventions and optimized clinical management strategies.

Methods: Skin and subcutaneous adipose tissue (5-μm sections) were collected from one patient (hand, foot, back), fixed in formaldehyde, and stained for inflammatory markers (CD68, CD163) and endothelial cells (CD31). H&E and Masson’s trichrome staining were performed. Images were captured and manually quantified. Results: Cutaneous tissue from the hands and feet demonstrated increased microvascular density (CD31) with thickened walls, perivascular fibrosis, and macrophage infiltration (CD68, CD163). Macrophages were observed along the nerve fibers and outer nerve layers, consistent with localized nerve inflammation alongside vascular remodeling. Conclusion: This study demonstrates concurrent vascular remodeling and nerve-associated inflammation in lipedema adipose tissue of the hand and feet. These findings highlight that pain in lipedema involves both vascular and neurogenic inflammatory mechanisms, extending the understanding of lipedema pathology beyond the lower extremities.

Background Lipoedema is a condition of abnormal accumulation of painful adipose tissue, usually in the lower body of women. The disproportionate subcutaneous adipose tissue may negatively impact health-related quality of life (HRQoL). There are currently no patient reported outcome measures (PROM) specifically designed to assess the HRQoL in individuals with lipoedema. The aim of this study was to compare scores on validated lower limb lymphoedema PROMs between females with lipoedema and lymphoedema. Methods In a private lymphoedema clinic in Australia between 1 October 2021 and 22 August 2023, individuals assigned female at birth, aged 18 years and older who consented to the entry of de-identified data into a research databank and completed the Lymphoedema Quality of Life tool (LYMQOL-leg) and/or Lymphoedema Symptoms Intensity and Distress Survey (LSIDS-L) for the legs were included in this study. Between group analysis was conducted on 151 participants who were either diagnosed with lipoedema (N = 90) or bilateral leg lymphoedema (N = 61). Participants with both conditions were excluded. Results Participants with lipoedema reported significantly higher burden scores for symptoms (p = 0.003), appearance (p = 0.003) and mood (p = 0.011) in the LYMQOL-leg survey when compared to participants with bilateral leg lymphoedema. Participants with lipoedema also reported significantly worse LSIDS-L scores for neurological sensation (p = 0.003), biobehavioral (p = 0.016) and resource (p = 0.008) questions compared to participants with lymphoedema. Conclusions This study highlights that although females with lipoedema and lymphoedema experience similar symptoms, their experiences differ in specific outcomes that influence their HRQoL. These findings warrant further investigation into the HRQoL concerns of individuals with lipoedema.

Introduction: Lipedema, a painful disease that almost exclusively affects women, leads to an excessive accumulation of subcutaneous adipose tissue, primarily in the extremities. Morphologically, it is characterized by hyperplasia and hypertrophy of adipocytes as well as by inflammation-associated cells and fibrosis. Limited knowledge exists regarding the background of adipocyte pathology. In the present study, we aimed to identify morphological alterations of lipedema adipocytes, which could cause functional implications in lipedema adipose tissue. Methods: Approximately 3000 adipocytes from nine lipedema and five control adipose tissue samples, originating from non-obese donors, were analyzed. The ratio of atypical nuclei (Lochkerne) in relation to the total amount of nuclei was assessed and compared between lipedema and non-lipedema samples. Results: Lipedema adipose tissue exhibits a significantly higher proportion of Lochkerne compared to controls (p=0.001). While 24% of adipocyte nuclei presented as Lochkerne in lipedema samples, only 3% were identifiable in controls. We further show that the process of Lochkern-formation involves the nuclear indentation by small lipid droplets and their subsequent transmigration through the nucleus towards the central lipid content. Conclusion: The significantly increased occurrence of lipoma-associated Lochkerne in lipedema adipose tissue compared to controls reveals that, from a morphological point of view, lipedema is a form of lipomatosis.

Background/Objectives: Non-invasive radiofrequency (NIRF) therapy is increasingly used in physical rehabilitation. However, its efficacy across differ...