From a review of the literature, it would appear that lipomas of the foot are relatively rare and that, when they do exist, they are of little clinical significance other than cosmetic appearance. The authors presented a case in which the size, location, and character of the mass predisposed the patient to entrapment syndrome of the intermediate dorsal cutaneous nerve. It is important to emphasize, however, that in these cases symptoms are related to a pressure phenomenon and are not a direct result of tumor physiology.
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Shh signaling directs dorsal ventral patterning in the regenerating X. tropicalis spinal cord.
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Department of Biochemistry, University of Washington School of Medicine. Electronic address:
Tissue development and regeneration rely on the deployment of embryonic signals to drive progenitor activity and thus generate complex cell diversity and organization. One such signal is Sonic Hedgehog (Shh), which establishes the dorsal-ventral (D/V) axis of the spinal cord during embryogenesis. However, the existence of this D/V axis and its dependence on Shh signaling during regeneration varies by species.
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