Medical Science: Recent Advances and Applications Vol. 9

Macrodystrophia lipomatosa (MDL) is an uncommon, non-hereditary congenital overgrowth disorder that can present manageable yet vexing challenges when it manifests in the adult foot. Building on our previously published case, this chapter provides an expanded, practice-oriented overview of pre-operative work-up, definitive resection of the involved ray, soft-tissue balancing, and post-operative rehabilitation. Recent literature confirms that complete ray excision with meticulous soft-tissue debulking remains superior to serial debulking alone, offering durable cosmesis and function while reducing recurrence rates to below 20% in carefully selected adults. Emerging concepts—including nerve-territory mapping, adjunct alpelisib therapy for progressive forms, and algorithmic multi-technique protocols in younger patients were integrated that can inform adult care. Novel reconstructive methods, such as targeted digital-nerve resection with allograft sensory reconstruction and modified Tsuge-type composite flap transfers, are critically appraised. Post-operative outcomes at 6- and 18-month review demonstrate pain-free ambulation in standard footwear, preserved plantar stability, and high patient-reported aesthetic satisfaction. Future directions encompass molecular diagnostics (PIK3CA mosaicism) and image-guided 3-D planning to further personalise surgery. By synthesising current evidence with detailed operative pearls, this chapter equips foot-and-ankle surgeons with a step-wise, outcome-focused roadmap for treating adult foot MDL.