Low-grade myofibroblastic sarcoma. Two rare tumors in two rare locations / Sarcoma miofibroblástico de bajo grado. Dos tumores infrecuentes en dos localizaciones poco habituales

Low-grade myofibroblastic sarcoma (LGMS) represents an atypical tumor composed of myofibroblasts with a predilection for the head and neck, especially in the tongue and oral cavity, with a high tendency to local recurrences and metastases, even after a long period. LGMS arising in the maxillary sinus and in the neck are extremely uncommon. To the best of our knowledge, only 50 cases of low-grade myofibroblastic sarcoma have been reported. We report two cases of LGMS of the maxillary sinus and neck, discussing clinical, histological, inmunohistochemical and therapeutic features (AU)

El sarcoma miofibroblástico de bajo grado (SMFBG) representa un tumor atípico, formado por miofibroblastos, que tiene predilección por cabeza y cuello, en especial la lengua y la cavidad oral, y se caracteriza por una elevada tendencia a las recidivas locales y a las metástasis, incluso después de transcurrido un período prolongado. Los SMFBG que se originan en el seno maxilar y en el cuello son excepcionales. Hasta lo que conocen los autores, solo se han publicado 50 casos de sarcoma miofibroblástico de bajo grado. Describimos 2 casos en los que se identificaron estos tumores, uno en el seno maxilar y el otro en el cuello, y abordamos sus características clínicas, histológicas, inmunohistoquímicas y terapéuticas (AU)

Solitary fibrous tumor surrounding the carotid sheath

Solitary fibrous tumors (SFTs) are rare spindle cell neoplasms that are mostly found arising from the pleura.Although SFTs recently have been reported in other regions, they are rare in the head and neck and have oftenbeen misdiagnosed due to their rarity. SFTs are benign in most cases. Clinically, SFTs usually manifest as wellcircumscribed,slow-growing, smooth and painless masses. Symptoms are often minimal, although they mayinclude sore throat, difficulty in swallowing, change of voice or trismus. CT-Scan and MRI are the most sensitiveimaging procedures used. The treatment of choice is complete surgical excision of the lesion. Because recurrenceshave been noted up to 30 years after surgery, long-term follow up is mandatory. In this article, we present a case ofa Solitary Fibrous Tumor arising in the parapharyngeal space in a 20-year-old man, involving the carotid sheath,treated by surgical excision with no recurrence after 1 year. The clinical presentation, surgical management andpathological findings are described (AU)

Solitary fibrous tumor surrounding the carotid sheath.

Solitary fibrous tumors (SFTs) are rare spindle cell neoplasms that are mostly found arising from the pleura. Although SFTs recently have been reported in other regions, they are rare in the head and neck and have often been misdiagnosed due to their rarity. SFTs are benign in most cases. Clinically, SFTs usually manifest as well-circumscribed, slow-growing, smooth and painless masses. Symptoms are often minimal, although they may include sore throat, difficulty in swallowing, change of voice or trismus. CT-Scan and MRI are the most sensitive imaging procedures used. The treatment of choice is complete surgical excision of the lesion. Because recurrences have been noted up to 30 years after surgery, long-term follow up is mandatory. In this article, we present a case of a Solitary Fibrous Tumor arising in the parapharyngeal space in a 20-year-old man, involving the carotid sheath, treated by surgical excision with no recurrence after 1 year. The clinical presentation, surgical management and pathological findings are described.

Delayed removal of a maxillary third molar from the infratemporal fossa.

Removal of an impacted superior third molar is usually a simple and uncomplicated procedure for an Oral and Maxillofacial Surgeon. Nevertheless, complications are possible and include infection, facial swallowing, trismus, wound dehiscence, root fracture or even orosinusal fistula. Iatrogenic displacement into the infratemporal fossa is frequently mentioned but rarely reported. This anatomical fossa includes several important structures such as the internal maxillary artery, the venous pterygoid plexus, the sphenopalatine nerve, the coronoid process of the mandible and the pterygoid muscles. Recommended treatment includes immediate surgical removal if possible or initial observation and secondary removal, as necessary, because of infection, limited mandibular movement, inability to extract the tooth, or the patient's psychological unease. Sometimes, the displaced tooth may spontaneously migrate inferiorly and becomes accessible intraorally. This report describes the location and secondary surgical removal of a left maxillary third molar displaced into the infratemporal fossa, two weeks after first attempt at extraction.