pseudotumour is a benign inflammatory lesion. mycobacterial spindle cell pseudotumour (msp) is a rare pseudotumour. it is a benign proliferation of spindle-shaped histiocytes containing acid-fast mycobacterium, commonly reported in immunocompromised patients. msp is usually associated with mycobacterium avium complex (mac). here, we present the case of a 38-year-old gentleman with acquired immu...

BACKGROUND Primary malignant tumors of the pericardium are rare, and most primary malignant pericardium tumors are mesotheliomas. Primary pericardial angiosarcoma is extremely rare, and it is associated with a poor prognosis. CASE PRESENTATION We report of a 47-year-old woman who complained of activity-related chest tightness and shortness of breath. Computed tomography, magnetic resonance im...

  Kaposiform hemangioendothelioma (KHE) appears as a single lesion at birth or early infancy in an equal sex ratio. A rare aggressive vascular proliferation has been recognized as a separate entity from other childhood vascular neoplasm. A 3-year-old Iranian boy with a rapidly enlarging mass in his (posterior aspect of skull at the midline) skull was present here. Physical examination revealed...

kaposiform hemangioendothelioma (khe) appears as a single lesion at birth or early infancy in an equal sex ratio. a rare aggressive vascular proliferation has been recognized as a separate entity from other childhood vascular neoplasm. a 3-year-old iranian boy with a rapidly enlarging mass in his (posterior aspect of skull at the midline) skull was present here. physical examination revealed a ...

Retiform hemangioendothelioma is a rare intermediate or borderline neoplasm of the blood vessels that mostly occurs in extremities. Here we report a unique case of retiform hemangioendothelioma presented in the external auditory canal. 58-year-old male patient presented with the complaint of right ear swelling for 4 years. On examination, a spherical swelling in the right ear was found occludin...

Kaposiform hemangioendothelioma (KHE) is a rare vascular neoplasm that can be potentially low malignant and mainly affects infants and adolescents. This tumor usually is seen in the skin, soft tissue, and retroperitoneum. This study is a case of KHE in the long bone of the ulna. The subject was a 7-year-old female patient with osteolytic lesion in the forearm without cutaneous lesions. Histolog...

BACKGROUND AND PURPOSE Hemangioendothelioma is the most common parotid gland tumor of childhood, and is diagnosed on clinical grounds, supported by imaging findings. Previous work has suggested that MR is the best imaging technique for assessment of parotid hemangioendothelioma. Demonstration of a reliable sonographic appearance would reduce the need for MR imaging in infants with this lesion. ...

Kaposiform hemangioendothelioma (KHE) is a locally aggressive vascular tumor which usually occurs in infants. Clinically it appears as ill-defined red to purple indurated plaque. KHE is commonly associated with Kasabach-Merritt syndrome (KMS) and lymphangiomatosis. Microscopically, the tumor is composed of infiltrating lobulated nodules with slitlike or crescentic vessels which are poorly canal...

malignant transformation of ameloblastomas arising from an odontogenic cyst or de novo is wellrecognized. malignancies in ameloblastomas may involve metastasis or a local dysplastic change in the tissue. the latter are classified as ameloblastic carcinomas. a 75-year-old male presented with a mandibular cystic swelling, with no evidence of metastasis. dysplastic ameloblastic cells with spindlec...

Vascular tumors of intermediate malignancy encompass a broad range of histologic entities. They are characterized clinically by having a high risk of local recurrence and limited risk of regional or distant metastasis. Vascular tumors of intermediate malignancy frequently present in the skin and often cause diagnostic diffi culty. This article reviews the clinical and histologic features of kap...