RESULTS Overall, the most common tumours excised from the hand were ganglions (n = 66/116, 56.9%) and giant cell tumours of the tendon sheath (GCTTSs; n = 11/116, 9.5%). However, distal to the MCPJs, GCTTSs (n = 11/39, 28.2%) were more common than ganglions (n = 7/39, 17.9%). Most of the ganglions (n = 59/66, 89.4%) arose from between the CMCJs and RCJ.CONCLUSION Most hand tumours were benign. Ganglions were the most common tumours between the CMCJs and RCJ, while GCTTSs were the most common tumours distal to the MCPJs.
We present a case of non-keratinizing carcinoma of the nasopharynx (NK-NPC) with an unusual histopathological pattern. The neoplastic cells were arranged in anastomosing cords embedded in a stroma which contained a significant component of alcian blue-positive myxoid substance forming a reticular pattern. These histopathological features gave an initial impression of a salivary gland-type carcinoma. On immunohistochemistry the tumor cells were strongly and diffusely positive for cytokeratins (AE1-3 and 5/6) and p63 and there was strong and diffuse nuclear positivity for Epstein-Barr virusencoded small RNA on in situ hybridization. This case highlights the histomorphological variability of NK-NPC. Awareness of the histological spectrum of NK-NPC is important in clinical practice and this is not always adequately highlighted in currently used standard textbooks of Head and Neck Pathology.
An 80-year-old woman presented with a mass in her left parotid region. An ultrasound-guided core biopsy showed sebaceous glands with lymphoplasmacytic infi ltration. Magnetic resonance imaging displayed a well-circumscribed lesion within the left parotid gland. The mass was completely excised, and the patient made a full recovery. Sebaceous lymphadenomas of the salivary glands are rare, benign tumors that are effectively treated by complete excision. The challenge that these tumors present lies in their accurate diagnosis. Because of their histologic similarity to related malignant tumors, such as mucoepidermoid carcinomas and sebaceous lymphadenocarcinomas, misdiagnosis could lead to unnecessarily radical treatment. We highlight the need for careful clinical and histologic diagnosis in tumors of the salivary glands.
Intravascular papillary endothelial hyperplasia (IPEH), often referred to as Masson’s Tumor, is an uncommon yet benign vascular disease of the skin and subcutaneous tissues. It usually arises within a blood vessel, but is considered to be a non-neoplastic reactive endothelial proliferation commonly associated with vascular injury. Although it is rare, knowledge of this disease is important as it may mimic other benign and malignant tumors, especially angiosarcoma, which may lead to unnecessary aggressive management. Typically, IPEHs are asymptomatic and are slow growing soft-tissue masses with extremely low-recurrence rates. In this article, we describe a 19-year-old male with a recurrence of Masson’s Tumor over the right little finger within 2 months of a routine excision of the lesion. We also present accompanying multimodality clinical, radiological, and pathological imaging. This case illustrates the innocuous nature of the initial lesion easily mistaken for a hemangioma. Awareness of the possibility of a recurrence of a Masson’s Tumor is important for clinicians to rule out the presence of malignant vascular lesions.
Schwannomas are rare tumors originating from Schwann cells of peripheral nerve sheath (neurilemma) of the ectoderm. They are also referred to as neurilemmomas and are generally be nign, solitary tumors arising from cranial and peripheral nerves. Rarely, they arise from the retroperitoneum and adrenal medulla. Retroperitoneal schwannomas constitute about 0.5 to 5% of all schwannomas and of which most of them are benign in nature. Most patients are asymptomatic or have vague abdominal symp toms. On imaging, they are often mistaken for adrenal tumors due to their location and preoperative diagnosis is often difficult. Magnetic resonance imaging (MRI) is the investigation of choice to demonstrate these lesions and its relation to other structures. Total excision is recommended as malignancy, although rare cannot be ruled out preoperatively. We present a case of a large retroperitoneal schwannoma that mimicked an adrenal incidentaloma and was excised laparoscopically. The imaging characteristics and management strategy are discussed.
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