Pediatric myofibroma/myofibromatosis of the soft tissue and bone: a clinicopathological analysis of 28 cases / 中华病理学杂志

Objective: To investigate the clinicopathological features, diagnosis and differential diagnosis of pediatric myofibroma/myofibromatosis of the soft tissue and bone. Methods: All cases of pediatric myofibroma/myofibromatosis of the soft tissue and bone diagnosed between January 2011 and December 2018 were retrieved from the surgical pathology records in the Department of Pathology, Beijing Jishuitan Hospital, Beijing, China. Clinical and radiological data were collected. H&E and immunohistochemistry were used to examine histological and immunophenotypic features and to make the diagnosis and differential diagnosis. The relevant literature was also reviewed. Results: Twenty-eight cases of pediatric myofibroma/myofibromatosis of the soft tissue and bone were respectively collected. The patients' ages ranged from 2 months to 14 years, with a mean age of 7 years. There were 7 females and 21 males. There were 12 cases located in soft tissue, including the finger (n=9), upper arm (n=1) and foot (n=2). There were 14 cases located in the bone of limb, including the femur (n=8), tibia (n=4), clavicle (n=2), fibula (n=2) and radius (n=1). There were 2 cases of myofibromatosis involving multiple bones. Radiology showed lytic lesions in the bone. The proliferation of spindle-shaped myofibroblasts arranged in fascicles with indistinct eosinophilic cytoplasm and bland nuclei, with no pleomorphism and cytological atypia. The characteristic histologic structure was the biphasic nodular growth pattern with cellular and paucicellular regions. The tumors might arrange in a hemangiopericytoma-like pattern. The stroma varied between dense fibrosis and myxoid changes. The reactive new bone formation and inflammatory cell infiltration also existed. Immunohistochemical study showed that the SMA was positive. The surgical resections were performed. One of the patients had tumor recurrence as a result of 11-month follow-up. Conclusions: The pediatric myofibroma/myofibromatosis of the soft tissue and bone is a very rare benign tumor and has a good prognosis. It has a characteristic morphology and its differential diagnosis from other spindle cell tumors could be made with the immunohistochemical analysis.

Multiple dermatomyofibromas

Abstract: This study describes a case of a 19-year-old patient with seven asymptomatic lesions on the chest, measuring between 0.5 to 1cm in diameter, with no history of trauma in the region. The immunohistochemical evaluation was positive for vimentin and smooth muscle actin, determining Dermatomyofibroma as definitive diagnosis. Dermatomyofibroma is a benign skin tumor, with a myofibroblastic origin, prevalent in young women. It usually presents as a single lesion, with very few reports of multiple lesions.

Intraosseous myofi broma of the jaw: Review of the literature / Miofibroma mandibular intraósseo: revisão de literatura

The objective of this study was to perform a review of the pathological features and treatment of intraosseous myofi broma of the jaw. Electronic searches were performed of MEDLINE, via Pubmed (from 1950 to November 2012), EMBASE and Cochrane Wiley, on November 27th, 2012, with no language restrictions. The electronic search yielded 41 hits, of which 27 articles were considered relevant after evaluation of titles and abstracts and underwent eligibility assessment according to the eligibility criteria Of these, 10 did not meet one or more inclusion criteria and were rejected. The 17 articles selected included three retrospective studies, 13 case reports and one case series. These articles reported on a total of 24 cases of solitary myofi broma in the jaw. Intraosseous myofi bromas of the jaw are rare lesions and are part of the wide group of spindle-cell neoplasms and are generally observed in the posterior mandible. It is important to establish the appropriate treatment to avoid unnecessary aggressive therapy. Conservative surgery is the preferred option. Keywords: Myofi broma; Mandibular Neoplasm; Treatment.

O objetivo deste estudo foi realizar uma revisão de literatura sobre miofi broma intraósseo da mandíbula, suas características patológicas e tratamento. Foi realizada uma busca eletrônica nas base de dados MEDLINE via Pubmed (1950 a novembro de 2012), EMBASE e Wiley Cochrane, no dia 27 de novembro de 2012 sem restrição de linguagem. A busca eletrônica resultou em 41 citações, e 27 artigos foram considerados relevantes pela leitura do título e pela avaliação do resumo. Desses 27 artigos, 10 não atenderam um ou mais critérios de inclusão e foram excluídos. Entre os 17 artigos selecionados, havia três estudos retrospectivos, 13 relatos de caso e uma série de casos. Vinte e quatro casos de miofi broma solitário intraósseo da mandíbula foram identifi cados. Miofi bromas intraósseos dos maxilares são lesões raras que fazem parte do grupo de lesões neoplásicas fusiformes e são comumente encontrados na região posterior da mandíbula. É importante estabelecer o tratamento apropriado para evitar terapia agressiva desnecessária. Cirurgia conservadora é a opção desejada.

Uterine Lipoleiomyoma in Peri or Postmenopausal Women

Lipoleiomyoma is an uncommon neoplasm of the uterus, composed of smooth muscles intermixed with mature adipocytes. These tumors are considered a benign variant of uterine leiomyomas. Herein, we report six cases of lipoleiomyoma experienced in our institution from January 2005 to March 2015. The patients ranged in age from 45 to 70 years; the etiology may be related to estrogen deficiency occurring after menopausal transition. Except for one lipoleiomyoma in the broad ligament, all others were found in the uterine corpus. The presenting symptoms were nonspecific, and most cases were incidentally diagnosed during surgery for other reasons. We performed preoperative imaging studies, including abdominal and pelvic computed tomography and magnetic resonance imaging. Preoperatively, four patients were diagnosed as having a pelvic mass and one patient was diagnosed as having a right ovarian mature teratoma. In one case, we found a gynecologic malignancy (cervical cancer 1A1). Histologically, there was no gross or microscopic contiguity between the lipoleiomyoma and the malignancy. Lipoleiomyomas seem to have a benign clinical course. In our study, there were no recurrences of or deaths attributed to the lipoleiomyomas during a mean follow-up period of 16.17 +/- 23.80 months.

Adult Multiple Myofibromas on an Atrophic Patch on the Thigh

No abstract available.

Adult Multiple Myofibromas on an Atrophic Patch on the Thigh

No abstract available.

Solitary Myofibroma of the Adult Mandible: A Case Report and Review of Literature

No abstract available.

Intraosseous myofibroma of the mandible: a case report / Miofibroma intraoseo mandibular: reporte de caso

The myofibroma is defined as a benign neoplasm formed by myoid contractile cells localized around the wall of thin blood vessels, it is a tumor that presents itself mostly in infancy although it may occur at any age and it is most common in head and neck; it is uncommon to be localized in the oral cavity and even less common if it is intraosseous. It may also be associated to miofibromatosis or present itself as a solitary lesion. The differential diagnosis depends on the localization and the radiographic characteristics; it would be very difficult to include, at first hand, myofibroma as an intraosseous lesion. Histopathologically, a neoplasm with a biphasic pattern formed by spindle cells in fascicles and bundles, spindle nucleus with eosinophilic cytoplasm inside a hyalinized stroma was found. In lesions of neoplasms of spindle cells histological studies should be supported by an immunohistochemical panel and show positive results to antibodies Actin, smooth muscle Actin and Vimentin.

El miofibroma es una neoplasia benigna compuesta por células mioides contráctiles localizadas alrededor de la pared de vasos sanguíneos delgados, es un tumor que se presenta sobre todo en la infancia aunque puede ocurrir a cualquier edad, tiene predilección en cabeza y cuello, sin embargo en cavidad oral es raro y aún más si es intraóseo, puede estar asociado a miofibromatosis o bien presentarse de manera solitaria. Los diagnósticos diferenciales dependen de la localización y de las características radiográficas y de primera instancia es muy difícil incluir al miofibroma entre las lesiones intraóseas. Histológicamente presenta patrón bifásico conformado por células fusiformes dispuestas en fascículos y haces así como núcleos fusiformes con citoplasma eosinófilo dentro de un estroma hialinizado. Es necesario recurrir al panel de inmunohistoquímica en neoplasias de células fusiformes, positivo a Acs Actina, Actina músculo liso y Vimentina. Reportamos el caso de una mujer de 45 años con un miofibroma en la mandíbula.

Inflammatory myofibroblastic tumor of the larynx in a 9-year-old boy / 临床耳鼻咽喉头颈外科杂志

This 9-year-old boy presented with dysphonia and dyspnea for one month. Laryngoscopy showed a tumor of anterior vocal cord. The patient received a tumorectomy, immunohistochemistry concluded to the diagnosis of inflammatory myofibroblastic tumor.

Plexiform angiomyxoid myofibroblastic tumor of stomach / 中华病理学杂志

<p><b>OBJECTIVE</b>To study the clinicopathologic features, immunophenotype and differential diagnosis of plexiform angiomyxoid myofibroblastic tumor (PAMT) of the stomach.</p><p><b>METHODS</b>The clinical and pathologic findings of 3 cases of PAMT in the gastric antrum were retrospectively analyzed. Immunohistochemical study was carried out and the literature was reviewed.</p><p><b>RESULTS</b>The age of patients ranged from 31 to 47 years. The male-to-female ratio was 1:2. The clinical presentation included epigastric pain and distension. Endoscopically, the tumor mass protruded into the gastric cavity at the antrum and ranged from 4.5 cm to 8.0 cm in greatest dimension. One of the tumors studied was associated with surface ulceration. Histologically, the tumors were located in the gastric wall. They were composed of bland spindle cells and small vessels arranged in a plexiform or nodular pattern within a myxoid stroma. Immunohistochemical study showed that the spindle cells were consistently positive for smooth muscle actin and muscle-specific actin. There was focal staining for h-caldesmon, desmin in case 3 and focal positive for epithelial membrane antigen, CAM5.2 in case 1. Further, CD10 and progesterone receptor were positive in case 3.</p><p><b>CONCLUSIONS</b>PAMT represents a rare novel mesenchymal tumor of the stomach, with a propensity of gastric antral involvement. The distinctive pathologic features help to differentiate this entity from other benign and malignant tumors.</p>

Solitary Cutaneous Myofibroma on the Sole: An Unusual Localization

No abstract available.

Dermatomiofibroma: relato de caso de doença rara / Dermatomyofibroma: a case report of a rare disease

O Dermatomiofibroma está incluído no grupo de lesões neoplásicas mesenquimais benignas de linhagem fibroblástica e miofibroblástica da pele. É uma doença rara, havendo aproximadamente 100 casos descritos na literatura mundial até o momento. Este artigo relata o caso de uma mulher jovem com apresentação clínica típica e diagnóstico histopatológico de dermatomiofibroma. Foram realizadas colorações especiais que mostraram preservação das fibras colágenas e a imunohistoquímica revelou positividade para vimentina e negatividade para actina e S100. Por se tratar de doença rara, os achados histopatológicos são de grande importância, mas a supeição clínica é possível em casos típicos como este.

Dermato myofibroma is included in the group of benign cutaneous mesenchymal neoplastic lesions of fibroblastic and myofibroblastic lineage. It's a rare disease and there are approximately only one hundred cases described worldwide in the medical literature up to now. The present study reports the case of a young woman with typical clinical cutaneous lesion and histopathological diagnosis of dermato myofibroma. Special stains were carried out which showed preserved collagen fibers and immunohistochemistry was positive for vimentin and negative for actin and S100. As it is a rare disease, the histopathological findings are of great importance but clinical suspicion is possible in typical cases such as this one.

Inflammatory myofibroblastic tumor of the urinary bladder

Inflammatory myofibroblastic tumor [IMT] of bladder is an uncommon benign tumor of bladder, which is of unknown potential, characterized by spindle cell proliferation with characteristic fibroinflammatory and pseudosarcomatous appearance. Essential criteria for the diagnosis of IMT are: spindle myoepithelial cell proliferation and lymphocytic infiltrate. Complete surgical resection is the treatment of choice

Fibrous hamartoma of infancy in an unusual location - a case report

Fibrous hamartoma of infancy is an uncommon fibroproliferative lesion that occurs only in infancy and childhood. It predominantly affects healthy boys and can be found in almost any subcutaneous tissue. The tumor is most frequently found in the axilla, followed by shoulder, inguinal area, and chest wall. This tumor can cause much concern about malignancy because it is firm and may be fixed to underlying tissues. Despite the occasional local recurrence, the clinical course is benign and the prognosis is excellent. Treatment is by local excision. The diagnosis is made by the characteristic histologic features. In order to avoid the misdiagnosis of malignancy and unnecessary radical therapy, both surgeon and pathologist must be familiar with this entity. We report a case of fibrous hamartoma of infancy in a 4-year-old boy in gluteal region

Computed tomography of infantile myofibroma in the ethmoid sinus: a case report

We report a 4-year-old girl complaining of diplopia and a small lump in the medial side of the left orbit. CT scan showed a mass at the anterior ethmoid sinus with erosion and expansion. The mass was excised and the diagnosis was solitary infantile myofibroma [IM]

Adult cutaneous myofibroma.

A 63-year-old male presented with an asymptomatic, slow-growing swelling on the right lower limb for the past one and half years. The histopathology revealed a lobular neoplasm with a biphasic pattern of spindle shaped cells and hemangiopericytoma like areas at the periphery of the lobule. The diagnosis of adult cutaneous myofibroma was made. This case highlights the importance of histopathology in reaching a definitive diagnosis.

Congenital Sialoblastoma: a Case Report

Sialoblastoma is a rare tumor of salivary gland origin, developing in the fetal or neonatal period. Most tumors arise in parotid gland, and rarely in submandibular gland. Because of its rare incidence, diagnosis of the sialoblastoma in head and neck tumors of children is not easy. The case of a congenital submandibular gland sialoblastoma is presented. A neonate was transferred right after birth due to a submandibular mass. CT scan showed a lobulating mass located posterior to the left submandibular gland, suggesting neurogenic tumor or myofibroma. The tumor was excised easily after division of a duct-like structure connecting with the submandibular gland. The microscopic findings showed the basaloid cells and ductules forming cellular nests, separated by thin fibrous tissue. Immunohistochemical staining was positive for cytokeratin, vimentin and Ki-67, which was consistent with sialoblastoma.

Solitary myofibroma of the breast: a case report.

Solitary myofibromas are relatively rare neoplasms but one of the most common fibrous neoplasms occurring in infancy and childhood. Adult cases have also been reported in the literature. We describe here a case report of an eighteen-month-old child who presented with a gradually enlarging nodule in the right breast. The case is presented for an insight into contemporary knowledge about its histogenetic origin, behaviour and prognosis.

Fetal neck myofibroma.

Magnetic resonance imaging (MRI), as an adjunct to ultrasonography, has become a promising tool in prenatal diagnosis and therapy. In this report, the authors described a case of giant solid mass arising in the fetal neck region diagnosed by prenatal sonographic examination at the gestational age of 33 weeks'. MRI was used to confirm the diagnosis, and to assist fetal airway assessment. Due to the concern of fetal airway compromise, the ex utero intrapartum treatment (EXIT) was strategically planned with help from specialists in the according fields. This allowed the authors to secure the fetal airway before fetomaternal circulation was disconnected. It was performed successfully through Cesarean section at the time of birth. Histopathology revealed infantile myofibroma, which is a rare form of such a tumor arising on the fetal head and neck region diagnosed prenatally.