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Introduction. Personal observations (20 cases, 19 photographs). Consideration of special clinical varieties or syndromes—groups of cases. Group I. Adiposis dolorosa. Group II. Obesity. Group III. Nodular circumscribed lipomatosis. Group IV. Diffuse symmetrical lipomatosis (Fetthals, Madelung; adéno-lipomatose symétrique à prédominance cervicale, Launois and Bensaude). Group V. Neuropathic edema, pseudoedema, pseudolipoma and lipoma. Group VI. Adipositas cerebralis (Fröhlich, Madelung and others). Consideration of the combined groups. General summary (including special subjects, arthritism, heredity, etc.). Etiology (including glands of internal secretion). Treatment. Conclusions. Bibliography.The object of this study is to simplify or unify the clinical classification of abnormal subcutaneous fat deposits by correlating the symptomatology and constitutional relations common to the several varieties or clinical groups that have been separated under descriptive designations according to their predominant characteristics. It is with special reference to Dercum's ``adiposis dolorosa'' that this study is undertaken. I shall
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Background: Lipedema is a common, female-predominant disorder characterized by disproportionate, painful lower-limb adipose tissue, and it still lacks an objective biomarker, a disease-modifying therapy, or consensus on whether its core lesion is inflammatory. Its molecular literature is openly contradictory, reporting both immune enrichment and immune down-regulation in the same gluteofemoral depot. Because the dominant morbidity is pain rather than adipose mass, this ambiguity carries direct clinical cost. We therefore asked the following three questions: whether the reported molecular hallmarks survive control for cell-type composition, whether pain and adipose volume behave as separable endpoints, and what the germline architecture implies about the primary lesion. Materials and methods: From a theory-neutral standpoint, we reprocessed the largest publicly deposited adipose bulk RNA-seq dataset of lipedema (14 women with lipedema versus seven controls, paired by depot) with Salmon (College Park, MD: University of Maryland) and DESeq2 (Seattle, WA: Bioconductor Project), estimated cell-type composition by single-sample gene-set enrichment (ssGSEA), and refitted differential expression with leukocyte and erythroid composition covariates to test identifiability. We also synthesized published treatment cohorts (pain versus volume) and reviewed the architecture of germline genome-wide association studies (GWAS). Results: There is no transcriptional lipolytic brake (ADRA2A +0.001; lipases unchanged or mildly up). The apparent immune down-regulation is not identifiable from blood content; adjusting for tissue composition reduces genome-wide-significant genes from 1,501 to four, with blood content correlated with disease at r approximately -0.7, so bulk data can neither establish nor exclude immune involvement, including the NLRP3 inflammasome. Pain and adipose volume are dissociable across treatments, so body weight is a confounded endpoint. The germline architecture reported to date (GRB14-COBLL1, VEGFA, RSPO3, ADAMTS9) is adipo-vascular and extracellular-matrix-based rather than immune, although the largest contributing study defined cases by a bioimpedance proxy rather than by clinical diagnosis. Conclusions: Lipedema's inflammatory status is currently undecidable from composition-confounded bulk tissue rather than settled, which explains the field's contradictory literature; the germline evidence, limited by its case definitions, supports as a hypothesis an adipo-vascular and connective program rather than a primary immune lesion; and pain, not weight, should anchor trials. We specify, but do not perform, the single decisive experiment - paired thigh-versus-abdomen single-nucleus RNA-seq with explicit composition control.
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Lipedema is a chronic and progressive disorder, a primary lipotrophy characterized by abnormal fat deposition, primarily in the buttocks and legs bilaterally. It is symmetrical and disproportionate. It is estimated to affect 10 to 18% of women in Europe and approximately 12.3% of the Brazilian female population.
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