Lipedema is classified by both anatomical distribution (types) and disease severity (stages), with staging systems reflecting progressive tissue changes and clinical severity.
Types (Anatomical Distribution)
Lipedema types describe the anatomical regions affected:
- Type I: Buttocks and hips
- Type II: Buttocks to knees (including medial thigh)
- Type III: Buttocks to ankles (entire lower extremity, sparing feet)
- Type IV: Arms affected (may occur with or without lower extremity involvement)
- Type V: Isolated lower legs (calves)
In clinical cohorts, Type III (48.3%) and Type IV (30.2%) are the most frequently observed distributions.[1]
Stages (Disease Severity)
The staging system reflects progressive pathological changes in subcutaneous adipose tissue:
Stage 1: Smooth skin surface with small, evenly distributed subcutaneous nodules; adipose tissue has normal texture[2-4]
Stage 2: Uneven skin surface with larger, palpable subcutaneous nodules creating an irregular texture; this is the most common stage at presentation (44.5%)[1-2]
Stage 3: Large tissue masses and extrusions, particularly around knees and ankles; significant tissue deformation with lobular appearance[1-4]
Stage 4 (also called lipolymphedema): Lipedema combined with secondary lymphedema, characterized by involvement of the feet and development of lymphatic dysfunction[3][5]
Stage-Dependent Pathological Changes
Disease progression correlates with measurable tissue alterations. Advanced stages demonstrate:
- Progressive adipocyte hypertrophy with stage-dependent shift toward larger cell sizes[6]
- Increasing interstitial fibrosis, with a trend toward progressive collagen accumulation in affected tissue[6]
- Elevated M2-like (anti-inflammatory) macrophage infiltration, particularly in intermediate stages[6]
- Increased subcutaneous tissue thickness that remains significant even after correction for age and BMI[2]
Clinical severity also increases with stage. Patients with Stages 3-4 report significantly more pain, loss of mobility, fatigue, and work-related problems compared to Stage 1-2.[7] Pain scores at lower limb examination points increase progressively with clinical stage, and comorbidity burden—particularly chronic venous disease, obesity, and metabolic disorders—correlates with advanced disease stage.[1-2]
Sources
- Clinical Characteristics, Comorbidities, and Correlation With Advanced Lipedema Stages: A Retrospective Study From a Swiss Referral Centre. Luta X, Buso G, Porceddu E, et al. PloS One. 2025;20(3):e0319099. doi:10.1371/journal.pone.0319099.
2. Observational Study on a Large Italian Population With Lipedema: Biochemical and Hormonal Profile, Anatomical and Clinical Evaluation, Self-Reported History. Patton L, Ricolfi L, Bortolon M, et al. International Journal of Molecular Sciences. 2024;25(3):1599. doi:10.3390/ijms25031599.
3. Lipedema: A Call to Action!.Buso G, Depairon M, Tomson D, et al. Obesity (Silver Spring, Md.). 2019;27(10):1567-1576. doi:10.1002/oby.22597.
4. Lipoedema: From Clinical Presentation to Therapy. A Review of the Literature.Langendoen SI, Habbema L, Nijsten TE, Neumann HA. The British Journal of Dermatology. 2009;161(5):980-6. doi:10.1111/j.1365-2133.2009.09413.x.
5. Lipedema-an Update. Wollina U. Dermatologic Therapy. 2019;32(2):e12805. doi:10.1111/dth.12805.
6. Lipedema Stage Affects Adipocyte Hypertrophy, Subcutaneous Adipose Tissue Inflammation and Interstitial Fibrosis. Kruppa P, Gohlke S, Łapiński K, et al. Frontiers in Immunology. 2023;14:1223264. doi:10.3389/fimmu.2023.1223264.
7. Stages of Lipoedema: Experiences of Physical and Mental Health and Health Care. Clarke C, Kirby JN, Smidt T, Best T. Quality of Life Research : An International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation. 2023;32(1):127-137. doi:10.1007/s11136-022-03216-w.
