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BACKGROUND: Lipedema is a chronic, progressive adipose tissue disorder that predominantly affects women and is characterized by disproportionate fat accumulation, pain, and edema. Hormonal fluctuations are frequently reported as triggers or modulators of symptoms, but the impact of exogenous hormones, especially hormonal contraceptives, remains poorly defined. OBJECTIVE: This study aimed to investigate the association between hormonal contraceptive use and the presence, severity, and self-reported worsening of lipedema symptoms in Brazilian women. METHODS: This observational, cross-sectional study was conducted at Amato - Instituto de Medicina Avançada using a structured online questionnaire applied between August and November 2025. We included women aged 18 years or older, residing in Brazil, with suspected or confirmed lipedema who provided electronic consent and completed core sections on lipedema symptoms, hormonal history, and contraceptive use. Questionnaires with less than 50% of core items answered, duplicate entries, and biologically implausible values were excluded. Symptom (0-8) and quality of life (0-15) scores were calculated. Self-reported changes in symptoms after starting hormonal contraceptives were analyzed as a four-level variable and as a binary worsening variable. Free text on side effects and timing of onset was categorized with natural language processing. Statistical analyses included chi-squared tests, Spearman correlations, and logistic and linear regression. RESULTS: A total of 637 women were included (mean age 41.8±8.7 years; mean body mass index (BMI) 28.9±6.4 kg/m²); 77.1% had a confirmed diagnosis of lipedema and 92.3% were current or previous users of hormonal contraceptives. Among users, 58.8% reported symptom worsening after starting contraceptives (34.5% severe; 24.3% slight), 40.3% reported no change, and 0.9% reported improvement (p<0.001). Free text analysis showed that 15.1% reported onset of lipedema symptoms temporally coinciding with contraceptive initiation. In multivariable analysis, a higher baseline symptom score was the strongest independent predictor of worsening, while duration of contraceptive use was not associated with risk. Pain intensity and BMI were the main independent predictors of quality of life impact. CONCLUSIONS: In this large sample of Brazilian women with suspected or confirmed lipedema, hormonal contraceptive use was frequently associated with self-reported worsening of symptoms, and a substantial minority reported symptom onset around contraceptive initiation. Women with higher baseline symptom burden appeared particularly vulnerable. These findings support individualized contraceptive counseling for women with lipedema and highlight the need for prospective studies with objective measures to clarify causality and mechanisms.

Objective The aim of this study is to assess the prevalence of HLA-DQ2 and HLA-DQ8 in women diagnosed with lipedema. Methods Leukocyte histocompatibility antigen (HLA) tests of 95 women diagnosed with lipedema were analyzed using non-probabilistic sampling for convenience. The prevalence of HLA-DQ2 and HLA-DQ8 was compared to the general population. Results The prevalence of HLA-DQ2+ was 47.4%, that of HLA-DQ8+ was 22.2%, the presence of any celiac disease associated HLA (HLA-DQ2+ or HLA-DQ8+) was 61.1%, both HLA (HLA-DQ2+ and HLA-DQ8+) was 7.4%, and the absence of celiac disease associated HLA was 39%. Compared to the general population, there was a significantly higher prevalence of HLA-DQ2, HLA-DQ8, any HLA, and both HLAs in lipedema patients. The mean weight of patients with HLA-DQ2+ was significantly lower than the overall study population, and their mean BMI significantly differed from the overall mean BMI. Conclusion Lipedema patients seeking medical assistance have a higher prevalence of HLA-DQ2 and HLA-DQ8. Considering the role of gluten in inflammation, further research is needed to establish if this association supports the benefit of gluten withdrawal from the diet in managing lipedema symptoms.

BACKGROUND: Lipedema is characterized by the deposition of abnormal fat in the lower and upper limbs bilaterally. It is a disease with high prevalence and genetic characteristics. Non-specific and non-quantified increases in the thickness of the subcutaneous tissue have previously been demonstrated using magnetic resonance imaging and computed tomography. OBJECTIVES: To evaluate the thickness of the dermis and subcutaneous tissue in predetermined areas as a distinguishing feature between individuals with and without lipedema using ultrasound. METHODS: Ultrasound images of 89 female patients were analyzed, including patients undergoing clinical investigation for venous insufficiency or lipedema who underwent ultrasound evaluations at our institution. Patients were divided in two groups: with lipedema clinically diagnosed and those without lipedema. They underwent a common Doppler protocol for venous mapping to assess venous insufficiency associated with the evaluation of dermis and subcutaneous thickness at pre-defined points of the lower limbs. RESULTS: There were 63 patients with lipedema. Anterior thigh, pre-tibial and lateral aspect of the leg and supra-just medial malleolar region were significantly different. Supra-just medial malleolar region was significantly different with BMI above 25. An optimal cutoff value was calculated for the ultrasound diagnosis of lipedema using thickness of the dermis and subcutaneous tissues. CONCLUSIONS: Studied criteria allow use of simple and reproducible ultrasound cutoff values to diagnose lipedema in the lower limbs. Pre-tibial region thickness measurement, followed by thigh and lateral leg thickness are recommended for the ultrasound diagnosis of lipedema.

BACKGROUND: Lipedema is characterized as an abnormal deposition of fat in the buttocks and legs bilaterally that may be accompanied by swelling, pain, and tenderness. It is still often confused with more frequent conditions such as obesity and lymphedema. The estimated prevalence in Europe varies between 0.06% and 39%. OBJECTIVES: To evaluate the prevalence of lipedema and identify health factors related to it in the Brazilian population. METHODS: Administration of a previously validated online screening questionnaire to a representative sample of the general population. The questionnaire was distributed and administered to anonymous volunteers representing the general Brazilian population using software designed for population analyses. RESULTS: 253 women answered the questionnaire, 12.3 ± 4% (Confidence Interval [CI] 95%) of whom presented symptoms compatible with a high probability of being diagnosed with lipedema. Furthermore, anxiety, depression, hypertension, and anemia were also correlated with a high probability of the diagnosis. CONCLUSIONS: The estimated prevalence of lipedema in the population of Brazilian women is 12.3%.