Glomus tumor of the ovary: report of a case with immunohistochemical and ultrastructural observations

Anastomosing Hemangioma of the Ovary With Leydig Cell Hyperplasia: A Clinicopathologic Study of 12 Cases

Anastomosing hemangioma is a recently described vascular neoplasm, initially identified in the male genitourinary tract. Since its first description, it has been reported at multiple anatomic sites, including rare cases in the female genital tract, most in the ovary. Herein we report the largest series to date of 12 ovarian anastomosing hemangiomas identified at our institution over a 15-yr period. The patients' age at the time of resection ranged from 50 to 76 yr (median: 62 yr), 3 patients presented with symptomatic pelvic masses, 3 tumors were identified by imaging studies, and the remaining 6 were incidentally discovered in ovaries removed for other indications. All tumors were unilateral, occurred at the ovarian hilum, and contained a vaguely lobulated architecture with sinusoidal-like vessels lined by hobnail endothelial cells with minimal to no cytologic atypia. A rim of luteinized/Leydig cells with abundant, eosinophilic cytoplasm and round, centrally placed nuclei surrounding the hemangioma was present in 9/12 tumors. Reinke crystals were observed in 3 of these 9 tumors. The volume of luteinized cells relative to the vascular proliferation ranged from 2% to 30%. All tumors with luteinized/Leydig cells also displayed numerous small eosinophilic, globular intracytoplasmic inclusions within the endothelial cells. The 3 tumors without luteinized/Leydig cells were exclusively intravascular lesions. Despite the frequent presence of luteinization/Leydig cells none of the patients experienced hormonal manifestations. Awareness of this rare benign ovarian entity is important, as its association with luteinized cells/Leydig cell hyperplasia (often exuberant) may be misinterpreted as a steroid cell tumor, Leydig-cell tumor, or as a mixed stromal-vascular tumor.

Case Report: The first case of primary pulmonary collision tumor comprising mixed squamous cell and glandular papilloma and glomus tumor

A collision tumor is a rare entity, particularly if occurring in the lung. We report a case of a 57-year-old woman with a primary pulmonary collision tumor comprising mixed squamous cell and glandular papilloma (MSGP) and glomus tumor (GT). An abnormal mass was discovered in the right lung by computed tomography (CT) of the chest. A right lower lobectomy with mediastinal lymph node dissection was performed. Histological examination of the surgical specimen suggested that the lung cancer was composed of two neoplastic components. To the best of our knowledge, this is the first report of a primary pulmonary collision tumor comprising two benign tumors of different origins, which were MSGP and GT.

Glomangioma of the Kidney: A Rare Case of Glomus Tumor and Review of the Literature

Background

Glomus tumors are rare mesenchymal tumors originating from glomus bodies in the skin. Glomus tumors of the kidney are rare tumors and only a few cases have been reported in the medical literature. An extensive search revealed a very limited number of primary renal glomus tumors. Although most of these cases were benign in nature, including a case with uncertain diagnosis of malignant potential, two were malignant.

Case Report

We present a unique case of a 57-year-old male patient with an incidentally discovered 2 cm left renal mass. Histopathology examination and immunohistochemical studies confirm the diagnosis of glomangioma (a form of glomus tumor). The patient was followed for one year after partial nephrectomy and showed a benign course without any evidence of local recurrence or metastasis.

Conclusion

To the best of our knowledge, this is the 16th case of primary benign renal glomus tumors. Primary renal glomus tumors are rare and may mimic other mesenchymal renal neoplasms radiologically. Proper investigation (including histopathological analysis and immunohistochemical staining) of kidney tumors is essential to make the diagnosis of glomus tumors, which usually show a benign clinical course following resection.

Two cases of glomus tumor arising in large airway: well organized radiologic, macroscopic and microscopic findings

Glomus tumors of the lung are rare benign neoplasm, originating from modified smooth muscle cells. The patients are usually presented with no or non-specific symptoms such as cough, dyspnea or hemoptysis. Although surgical treatment is considered as the treatment of choice, the endobronchial therapy can be applied to the patients who are unfit for surgical excision. Herein, we describe two rare cases of glomus tumor originated at large airway (trachea and main bronchus) without respiratory symptoms and review their characteristic radiologic, macroscopic and pathological features.

Malignant glomus tumor of kidney: the first reported case and review of literature

Glomus tumors are mesenchymal neoplasms and are rarely seen in visceral organs like the kidney. Our patient presented with a metastatic, malignant, and highly aggressive glomus tumor in the kidney. In our extensive literature review, we did not come across even a single case of malignant glomus tumor arising in the kidney. We report the clinical presentation, radiologic, and pathological features of our case. Immunohistochemical findings that distinguish our case from other reported cases of glomus tumors arising from the kidney have been discussed. We have also reviewed the criteria for malignancy and other reported malignant glomus tumors.

Glomus Tumor of the Ovary: A Case Report

A 55-year-old woman underwent a total hysterectomy, bilateral salpingo-oophorectomy, partial omentectomy, and lymphadenectomy for endometrial cancer. Histologically, the cancer was endometrioid adenocarcinoma grade 1, which invaded the myometrium. There was no macroscopically detectable mass in the ovaries. However, histological examination revealed a small tumor, 1 mm in size, in the medulla of the right ovary. The ovarian tumor was composed of uniform epithelioid cells that grew in nests. Vessels of various sizes were observed within the tumor, and they were surrounded by tumor cells. Immunohistochemically, the ovarian tumor was positive for smooth muscle actin and vimentin but negative for desmin and CD34. Based on these findings, the authors made the diagnosis of ovarian glomus tumor. Although an ovarian glomus tumor is extremely rare, the authors believe that it should be included in the differential diagnosis of ovarian mesenchymal tumors and sex cord tumors.

Infiltrating glomus tumor of uncertain malignant potential arising in the kidney

Glomus tumors closely resemble the normal glomus body and have a predilection for skin and subcutaneous tissue. These tumors rarely present in visceral organs. We report a case involving the kidney. This glomus tumor displays typical cytology and immunohistochemical profile of glomus tumors elsewhere. However, this tumor is large, has a deep location and exhibits an infiltrative margin and increased mitotic activity. These features, by current definition, would suggest malignant behavior. However, the rarity of such an entity in the kidney highlights the need for caution and a diagnosis in a continuum between benignity and malignancy. To the best of our knowledge, this report is the first case of infiltrating glomus tumor or glomus tumor of uncertain malignant potential arising in the kidney.

Glomus tumor of the kidney: a report of 3 cases involving renal parenchyma and review of the literature

Glomus tumor is a rare mesenchymal neoplasm affecting the subcutaneous tissue of the distal extremities in the majority of cases. It only rarely involves visceral organs. We report 3 cases of the glomus tumor family in the kidney, a solid glomus tumor, a glomangioma, and a glomangiomyoma. All 3 tumors involved the renal parenchyma and occurred in 3 men aged 36, 81, and 48 years, respectively. All 3 tumors were well-circumscribed and showed morphology otherwise identical to those seen in soft tissue. All 3 tumors were immunoreactive for actin and negative for desmin and S100 and only 1 tumor expressed CD34 in tumor cells. To date, all 3 tumors have followed a benign course without evidence of recurrence or metastasis. This report expands the spectrum of mesenchymal tumors of the kidney.

Glomus tumor of the mesocolon

Glomus tumors are rare distinctive benign neoplasms, which arise from modified smooth muscle cells of the normal glomus body and are most commonly located in the subungual region of the finger. Intraabdominal locations are relatively rare. We report a case of glomus tumor of the mesocolon in a 10-year-old girl. Surgical exploration showed a lesion in the transverse mesocolon, which was excised. Histopathology showed it to be a glomus tumor of the mesocolon.

Primary pulmonary glomus tumor with contiguous spread to a peribronchial lymph node

Glomus tumors are uncommon soft tissue tumors. Rare occurrences in visceral organs including the respiratory tract have been reported. The vast majority of these tumors are biologically benign. We report a case of primary pulmonary glomus tumor with atypical features characterized by mild nuclear atypia, local infiltration, and contiguous spread to a peribronchial lymph node. The current literature is reviewed.