A 10-year-old male intact Corso dog was referred for lameness and for a large neoplasm affecting the right foreleg. Physical examination of the patient revealed a 5 x 5 x 3 cm mass in the distal right foreleg. Histopathology was consistent with a diagnosis of appendicular osteosarcoma. The staging process found no evidence of metastasis. Because of the large size of the patient, the owners elec...

A woman presented with a hard lump in the right breast and palpable nodes in the right axilla. Mammography and ultrasound disclosed a 4.5-cm, irregular, dense mass with lobulated borders in the upper outer quadrant of the right breast. Results of staging investigation, including chest radiographs and bone scans, were normal. The patient underwent a right modified radical mastectomy with axillar...

Positron emission tomography/computed tomography (PET/CT) has been widely utilized in the clinic and in animal research for detecting and serially staging various types of neoplasms, including lymphomas, melanoma, lung cancer, thyroid cancer, head and neck cancer, esophagus and gastric cancer, colorectal cancer, pancreatic cancer, gynecologic cancers, osteosarcoma, breast cancer, pheochromocyto...

Pediatric nasopharyngeal tumors are rare, and few clinicians possess more than anecdotal experience. The differential diagnosis includes a diverse group of benign and malignant tumors, but can be narrowed further based on the clinical and radiographic appearance of the mass. Nasopharyngeal angiofibroma has such characteristic angiographic and CT imaging that many authors suggest biopsy is not e...

A 52-year-old Caucasian female with complaints of chronic nasal obstruction and anosmia was conservative treated for 2 years. The patient was sent to our tertiary care center after developing a forehead swelling and decreased visual acuity. Contrast-enhanced CT-Scan and MRI (Figure 1 & 2) showed a large nasal cavity tumor, achieving both frontal sinuses, with bone expansion and erosion, and inf...

INTRODUCTION Splenic angiosarcoma is a rare tumor with only a few cases reported in the literature. Surgical resection offers the best chance of cure for this aggressive neoplasm but is often precluded by infiltration of the tumor to surrounding critical structures. We report a case of a locally advanced angiosarcoma rendered operable by treatment with Paclitaxel monotherapy. CASE PRESENTATIO...

BACKGROUND Cavernous hemangiomas are rare tumors, mainly localized in the liver and skin, but also reported in the cerebellum and eye fundus as a part of von Hippel Lindau Syndrome. Adrenal hemangiomas are less than 1% of all the adrenal neoplasms and usually are reported as benign, non-functioning tumors, originating from the adrenal cortex and surrounded by normal or hyperplastic adrenal tiss...

Primary spine tumors are rare, accounting for only 4% of all tumors of the spine. A minority of the more common primary benign lesions will require surgical treatment, and most amenable malignant lesions will proceed to attempted resection. The rarity of malignant primary lesions has resulted in a paucity of historical data regarding optimal surgical and adjuvant treatment and, although we now ...

BACKGROUND Malignant melanoma of the conjunctiva is an extremely rare non-cutaneous neoplasm with infrequent skeletal metastatic spread. CASE PRESENTATION We present the case of a 54 year old female Caucasian patient with osseous metastases originating from a malignant melanoma of her right conjunctiva. Metastatic deposits were identified in the left humeral diaphysis and left tibial metaphys...

Background: Kaposi's sarcoma continues to be the most common human immunodeficiency virus - associated neoplasm with considerable morbidity and mortality. Objective: To describe the clinical and laboratory characteristics, initial staging, and outcomes of aids patients with Kaposi's sarcoma at an university hospital of Recife, Pernambuco. Methods: This is a descriptive study with analytic c...