[Infection of the hand: a specific disease picture].

Certain anatomical and physiological features are responsible for the specific clinical presentations of hand infections: The dorsum of the hand possesses a loose mobile areolar layer, whereas the gripping function of the palm has determined the development of a dense, firmly anchored sheet layer of connective tissue. It follows that infections of the dorsum of the hand can spread easily and give rise to extensive cellulitis. This cannot occur on the palmar aspect, where infection always tracks along the path of least resistance into the deep tissues, rapidly reaching the functionally important structures of the flexor compartments, including the subfascial compartments of the deep palmar space and the space of Parona in the forearm. A similar chain of events characterizes infections of the thenar and hypothenar eminences. Distal finger infections around the nail are a separate clinical entity with a considerable risk of running a chronic course and involving bone or the distal interphalangeal joint. In this case the sequence leads form subcutaneous infection or paronychia via bone infection to joint sepsis. There is considerable scope for misdiagnosis of hand infections, and inappropriate conclusions may lead to serious consequences for future function of the hand. The treatment of hand infections is demanding, time-consuming and not infrequently requires the infrastructure of a hospital clinic; therefore, in cases of doubt, early referral is always advisable.