What is a Leiomyosarcoma?
Leiomyosarcoma is a type of soft tissuesarcoma , which ordinarily build up in roue vessels , brawn , and fat . Leiomyosarcoma is one of the common types of subdued tissue sarcoma . Among superficial soft tissue paper neoplasms , sarcomas constitute less than 1 % and , among them , leiomyosarcomas exemplify between 3 and 6.5 % , according to different expert , which means that they are rare or infrequent tumors .
These neoplasm are derived from the muscular fibers of the hair erector muscle , from the heftiness fibers located around the sweat gland or from the muscle fiber of the vascular tissue paper located at the colligation between the dermis and the hypodermis . They tend to have a not bad incidence in the ordinary age of life-time , between 50 and 65 years of age , without prevalence by a particular sex .
From a clinical point of view , in the legal age of case the most frequent symptom is the presence of a awful nodular wound that can be exclusive or multiple . In the case of primary forms of leiomyosarcoma , the wound is characteristically solitary or undivided , while the existence of multiple nodules must make consider the chance that it is a metastatic form or secondary to an internal leiomyosarcoma , a rare configuration , alike , of evidence itself as an inner neoplasia , and that in these case almost 70 % are located in the retroperitoneal and/or mesenteric zone . Thus , in some sheath , and in a generic way , cutaneal metastasis , even within the oddment , may found the first symptom or materialisation of the existence of a silent internal neoplasm .
These lesion are commonly locate in the grim limbs ( 50 - 70 % ) , upper limb ( 20 - 30 % ) , and between these location , they normally do so on the surfaces of extension and the proximal region of the tree branch , trunk ( 10 - 15 % ) and drumhead ( 1 - 5 % ) .
The diagnosis by the clinical examination of this eccentric of lesion is prodigious , although there are differences in the clinical exploration between the cutaneous and subcutaneous nodule , being in almost all cases histopathological and immunohistochemical .
Clinically , cutaneous leiomyosarcoma usually present as nodules adhered to the skin in some case ulcerous and with changes in coloration order from cherry-red , brown or even grayish - calamitous , for example , and with slow growth . The hypodermic leiomyosarcomas do not adhere , they are mobile and the skin is intact and without variety in color . The most frequent symptom of these tumor is painful sensation ( 85 to 95 % of fount ) , with less frequent symptom such as pruritus ( itching ) , burning or bleed from the lesion . The differential diagnosing of leiomyosarcomas includes all those process or consideration that attest as soft tissue neoplasm and , as it is easy to take , it basically goes through confirmation by histopathological written report and admit , for example , fibrosarcomas , malignant histiocytomas , rhabdosarcoma , untypical or malignant fibroxanthomas , dermatofibromas , schwannomas , melanomas , neurofibromas , synovial sarcoma or dermal metastasis , among others .
The division of the leiomyosarcomas , with histopathological criteria , in dermal or cutaneous and subcutaneous or hypodermic , is interesting from the prognostic - evolutionary point of horizon for the patient . Thus , in the shell of dermal leiomyosarcomas , the local return rate is 10 to 30 % and that of metastasis is non - existent for some generator . The hypodermic ones present a recurrence rate of 50 to 70 % and metastasis between 30 and 40 % of lawsuit . Thus , primary cutaneous leiomyosarcoma , in contrast to the hypodermic leiomyosarcoma , is a relatively benignant disease , in relation to the life-sustaining prognosis and tumor recurrence with passable discourse for these forms .
The diagnosing , given the said clinical characteristics , is ground above all on the histopathological and immunohistochemical field .
The intervention is fundamentally operative , performing an extirpation with safety margins , which harmonize to most generator should be about 3 to 5 cm , pay that it is a tumour with a poor response to radiation and / orchemotherapy . last , it should be noted the importance of occasional clinical follow - up of these patient , given the rate of recurrence and the incidence of metastasis , as well as the predictive importance of early detection of them .
Conclusion
The elapsed fourth dimension between the diagnosis of the basal tumor and the evolution of skin lesions varies between 3 and 16 months . cutaneal leiomyosarcomas are very olympian . They can be primary or metastatic . The primary can be epidermal ; they have a very good prognosis , or subcutaneous , of poor medical prognosis . The metastatic leiomyosarcoma to the skin are infrequent .
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