An ulcerated, 1 x 0.5 cm, subcutaneous mass on the craniolateral aspect of the right tibiotarsus of a 4-year-old male cockatiel was removed. Histologically, the neoplasm was non-encapsulated, infiltrative and composed of irregular vascular channels lined by branching and variably sized spindle-shaped cells with large vesicular nuclei, prominent nucleoli and rare mitoses. Surrounding these vascu...

  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...

Extraskeletal myxoid chondrosarcoma (EMC) is a relatively rare but well-defined neoplasm. This report describes two patients, one with EMC of the buttock and one with EMC of the knee. The two cases presented with large lobed masses and long T1 and T2 signaling identified by magnetic resonance imaging (MRI). An enhanced MRI scan demonstrated enhancement of the tumors. The tumors were composed of...

Mammary myofibroblastoma is a rare mesenchymal neoplasm that typically presents in older men and women. Less commonly, these benign tumors may also occur in soft tissues located outside of the breast, in which case they are referred to as mammary-type myofibroblastomas. The histologic composition of this benign spindle cell tumor can be markedly varied. We present a case of a large mammary myof...

Neurofibromatosis is extremely variable in its presentation. Segmental neurofibromatosis (SNF), which corresponds to NF-type 5 in the Riccardi classification, is a rare disorder. It may go unrecognized if few lesions are observed. We present a case of segmental neurofibromatosis in a 28 year-old patient who presented with multiple papules and nodules distributed in dermatomal fashion on the tru...

Anaplastic lymphoma kinase (ALK) rearranged spindle cell mesenchymal tumours are an emerging category of soft tissue neoplasm with variable clinical and pathological features.1–3 We describe a case 6-year-old female who presented pigmented lesion on her abdomen. Biopsy the showed low-grade dermally based prominent storiform architecture, some entrapped collagen focal extension into subcutis. Th...

Sarcomas of the esophagus, including carcinosarcoma, are rare neoplasm cases and comprise 0.1-1.5% of all esophageal tumors. Leiomyosarcoma is the most common of the pure mesenchymal tumors of the esophagus, but sarcomas with combined histological types such as carcinosarcoma occur more frequently than pure sarcomas. We report a rare case of spindle cell sarcoma of esophagus in a 55-year-old wo...

This report concerns a case of primary de-novo origin malignant fibrous histiocytoma of breast in a 32 years young lady involving almost the entire right breast. Fine needle aspiration cytology of the breast mass suggested a malignant spindle cell lesion. Then she was treated by simple mastectomy followed by chest wall irradiation. Histopathology together with immunohistochemistry confirmed the...