Resumen

HERNANDEZ GONZALEZ, Erick Héctor; MOSQUERA BETANCOURT, Gretel  y  RONDON MARTINEZ, Evarelis. Malignant pleomorphic storiform fibrous histiocytoma of the left arm. AMC [online]. 2017, vol.21, n.3, pp. 370-377. ISSN 1025-0255.

Background: malignant fibrous histiocytoma is the most frequent soft tissue sarcoma in adulthood. It is seen in extremities in about 70-75 % and lower limbs are the most affected ones with 60 %. Objective: to present a case of malignant storiform pleomorphic histiocitoma of the left arm who underwent surgical treatment at universitary hospital Manuel Ascunce Domenech of Camagüey in 2016. Clinical case: a 60 year old male patient with a round increasing volume in posterolateral proximal left arm with collateral circulation. It was palpated a 20 cm diameter smooth, firm, fix to deep planes and painful mass with negative auscultation. Simple left humerus radiography informed a homogeneous radiopacity in surrounding soft tissues, no periosteal reaction or bone damage. Ecography of soft tissues: hypoecoic image of 200 x 170 mm between triceps and deltoid muscles reaction, with well defined pseudocapsule and no bone affection. An aspiration biopsy was done which inform a malignant mesenchimal neoplasia as a possible malignant histiocytoma. Surgical treatment was carried out to remove the tumor with oncologic margins. Final biopsy after immunohystochemical staining revealed a malignant fibrous pleomorphic storiform histiocytoma. The patient was sent to oncologic treatment with radiotherapy and a local recurrence was diagnosed, that is why a four quarter amputation was achieved. Conclusions: malignant fibrous histiocytoma is the most frequent soft tissue sarcoma in adulthood. There are different histological varieties, that is why immunohystochemical staining is a key tool for accurate diagnosis. Surgery and radiotherapy are the best therapeutic combination. Age, tumor depth, histological variety, location, absence of metastasis and size are the most important prognosis factors.

Palabras clave : HISTIOCYTOMA, MALIGNANT FIBROUS; THERAPEUTICS; SARCOMA [therapy]; AGED; CASE REPORTS.

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