A case report of a rare intramuscular granular cell tumor

Benign granular cell tumor of the abdominal wall mimicking postpartum desmoid tumor

Granular cell tumors are uncommon soft tissue neoplasms derived from Schwann cells. It is extremely rare for granular cell tumors to be found in the anterior abdominal wall, with only 12 cases of benign abdominal wall granular cell tumors reported in the medical literature to date. We report a case of an upper abdominal wall granular cell tumor in a recently postpartum 35-year-old woman. Based on the patient's history, recent postpartum presentation, and imaging findings, the soft tissue tumor was initially suspected to be a desmoid tumor. Therefore, following biopsy and resection, the final histopathological diagnosis of benign granular cell tumor was quite unusual. Herein, we discuss a unique presentation of benign granular cell tumor and its diagnostic workup, including imaging and histopathologic findings, to highlight the possibility of this rare entity in the differential diagnosis of certain abdominal wall soft tissue masses.

Intramuscular granular cell tumor in the sternocleidomastoid muscle: A case report and literature review

Granular cell tumor (GCT) is a rare soft-tissue neoplasm that originates from Schwann cells. Most cases occur in the subcutaneous or submucosal regions, and intramuscular GCT is even more uncommon. Herein, we describe an atypical GCT growing in the sternocleidomastoid muscle. A 41-year-old Chinese man was admitted to our hospital for a right neck mass. In magnetic resonance images, the mass showed higher signal intensity than the adjacent normal muscle on T2-weighted images and intermediate signal intensity on T1-weighted images. Slightly enhanced and higher signal intensity was observed in the peripheral rim on contrast-enhanced fat-sat T1-weighted images, and the "stripe sign" was evident. The tumor was completely resected, and pathological examination indicated an atypical GCT. The patient tolerated the procedure well. This is a rare case report of an intramuscular GCT from diagnosis to treatment. Magnetic resonance imaging might help diagnose such tumors, and we review different magnetic resonance imaging characteristics of intramuscular GCTs at other sites.

A Rare Case Report of Granular Cell Tumour of the Abdominal Wall and a Review of the Literature

Granular cell tumours (GCTs) are rare soft tissue tumours of neural origin. They have been reported in multiple anatomical sites. However, only 14 cases worldwide have been reported arising from the abdominal wall. While they can clinically manifest in a variety of ways, often they present as a small, slow-growing nodule with benign features. They can, however, be malignant, and in rare cases, they have been reported to metastasise. Here, we present a case of a rare abdominal wall GCT, which was managed with local excision. The purpose of this paper is to report the patient's clinical history, presentation, and surgical management, as well as to review the current literature to highlight the existence of this rare entity and the possibility that this may occur and should be considered a differential diagnosis in clinical practice.

Granular cell tumor of soft tissues: MR findings

Granular cell tumors (GrCT) are histologically unique neoplasms that often manifest as painless solitary nodules located in the dermis or submucosal tissue. In this article we analyze the radiologic features of this type of tumor in five patients by magnetic resonance imaging (MRI), analyzing morphologic and signal characteristics. MR imaging findings were similar to other publications and we demonstrate low ADC values in our series.

Malignant granular cell tumor of the multifidus muscle: Case report and review of the literature

Granular cell tumors (GCTs) are uncommon soft tissue tumors characterized by cytoplasmic granular appearance of the neoplastic cells. Malignant GCTs comprise less than 2% of GCTs and are mostly found in the subcutaneous soft tissues of the lower extremities, especially the thighs. This report presents a case of malignant granular cell tumor in the right multifidus muscle. A 69-year-old woman presented to the surgeon with a 3 month history of light pain in the lumbar area and hip joint, with no particular history. CT and MRI revealed a soft tissue tumor with a maximum diameter of 7.5 cm. There is patchy unenhanced hypointense shadow in the mass. Widely excision was performed for the primary tumor, which was interpreted as an malignant GCTs. GCTs should be considered in the differential diagnosis in a rapidly growing intramuscular tumors. We investigated the CT and MRI findings of malignant granular cell tumor.

Investigation of the Molecular Profile of Granular Cell Tumours and Schwannomas of the Oral Cavity

Granular cell tumours (GCTs) are rare submucosal lesions, thought to develop from Schwann cells, characterised by large polygonal cells with abundant lysosomes. The objectives of this study are to investigate whether GCTs have an antigen-presenting cell (APC) phenotype or a neural crest phenotype using immunohistochemistry and to compare expression profiles with Schwannomas. Immunoreactivity to CD68, HLA-DR, CD163, CD40 and CD11c (APC phenotype) and markers of neural crest cell (NCC) origin S100, SOX10, NSE and GAP43 in 23 cases of GCTs and 10 cases of Schwannomas were evaluated. RT-qPCR was used to identify a possible NCC developmental phenotype in 6 cases of GCTs. GAP43 was identified as a new NCC marker for GCTs, and some evidence was found for an APC phenotype from CD68 and HLA-DR immunoreactivity. RT-qPCR failed to identify an NCC developmental phenotype of GCTs, likely due to technical issues.

Non-epithelial tumors of the larynx: case series of 12 years

PURPOSE

Laryngeal neoplasms are almost always epithelial in origin and squamous cell carcinoma is the most common tumor of the larynx. Non-epithelial tumors make a small subset of laryngeal neoplasms. We present the experience of a single institution to define clinical presentations and outcomes.

MATERIALS AND METHODS

The pathology archives and clinical records of our center with the diagnosis of laryngeal tumors between the 2005 and 2018 were reviewed. Age, gender, symptoms, location of the tumor, histopathological diagnosis, treatment modality and disease status were discussed.

RESULTS

657 patients were diagnosed with laryngeal tumor between 2005 and 2018 and 13 patients with non-epithelial tumors were identified. The majority of the patients were male. The age ranged between 13 and 93 years. The most common tumor localizations were vocal cords and subglottis. Seven patients were diagnosed with malignant tumors and six patients had benign tumors. Chondrosarcoma was the most common malignant mesenchymal tumor. Others were leiomyosarcoma, fibrosarcoma and liposarcoma. The most common benign non-epithelial tumors were schwannoma and hemangioma. Plexiform neurofibroma and granular cell tumor were the other benign tumors. Eleven patients underwent excisional biopsy. One patient underwent partial laryngectomy and one had total laryngectomy. Three cases presented with recurrent tumor. Among the recurrent cases, two were malignant tumors.

CONCLUSION

Non-epithelial tumors of the larynx are rare and have a wide histological diversity. Immunohistochemical studies are of great importance in the diagnosis of these tumors. Primary mesenchymal tumors of the larynx should be kept in mind in differential diagnosis.

Metastasizing Malignant Granular Cell Tumor (Abrikossoff Tumor) of the Anterior Abdominal Wall, with Prolonged Survival

Malignant granular cell tumor (MGCT) is a rare high-grade mesenchymal tumor of Schwann cell origin. MGCTs commonly affect thigh, extremity, and trunk; however, involvement of the abdominal wall is quite rare. It has poor prognosis with 39% mortality rate in 3-year interval. We report a 50-year-old female who had MGCT arising in the anterior abdominal wall and developed massive metastatic deposits in both lungs and in the right inguinal lymph nodes, with prolonged survival for 11 years. A brief review of the literature is presented.

Synchronous subcutaneous granular cell tumours, a rare presentation

We describe a unique presentation of a rare disease presentation of a granular cell tumour. A 36-year-old woman presents with a large symptomatic left flank mass that had been slowly increasing in size. Multiple synchronous subcutaneous masses were found at presentation on the left breast, right auricle and right cheek. After diagnosis of granular cell tumour by core needle biopsy, the masses were excised with histopathological and immunohistochemical analysis of both specimens confirming the presence of non-malignant granular cell tumours. Granular cell tumours are rare Schwann cell derived tumours that are typically asymptomatic and benign. These tumours are most often located in the head and neck, with multifocal disease present in approximately 5-16% of patients. Final pathology is necessary for diagnosis and frozen section is rarely helpful. Malignancy is present in approximately 2% of cases and can be diagnosed by the presence of a high mitotic rate, large nucleoli, necrosis, spindling and pleomorphism are other suspicious features. Granular cell tumours do not generally require adjuvant treatment. The mainstay of therapy is surgical resection with surveillance.