Multiple symmetric and multiple familial lipomatosis

Area of Science:

• Endocrinology
• Dermatology
• Genetics

Background:

• Lipomas are common benign soft tissue tumors, rarely malignant.
• Lipomatosis involves multiple lipomas without lipoatrophy, significantly affecting quality of life.
• Key entities include symmetrical multiple lipomatosis (MSL) and familial multiple lipomatosis (FML).

Purpose of the Study:

• To differentiate between MSL and FML.
• To highlight clinical features, associations, and potential pathophysiological mechanisms.
• To emphasize the need for therapeutic research.

Main Methods:

• Review of existing literature on MSL and FML.
• Clinical description and comparison of the two conditions.
• Discussion of associated conditions and genetic components.

Main Results:

• MSL primarily affects men with alcohol abuse, often presenting with upper body/neck lipomas (buffalo hump) and metabolic issues; it lacks pain.
• FML, described since 1846, affects men and women equally, typically in the third decade, with autosomal dominant inheritance and variable penetrance.
• FML is associated with nevi, angiomas, polyneuropathies, GI issues, and notably, insulin sensitivity, contrasting with other lipodystrophies.

Conclusions:

• MSL requires screening for associated conditions like metabolic syndrome, alcohol abuse complications, and cancers.
• FML presents with distinct genetic and clinical features, including insulin sensitivity.
• Further understanding of lipomatosis pathophysiology is crucial for developing targeted therapies beyond symptomatic treatment.