unusual morphologic pattern of papillary carcinoma of the thyroid

We report a case of an unusual morphologic pattern of papillary carcinoma of the thyroid within a single large encapsulated nodule, consisting predominantly of microfollicles with bland nuclei to a transition of follicles lined by optically clear nuclei and ill-defined papillary structures

Fine needle aspiration and frozen section diagnsis in the management of thyroid nodles

Fine needle aspiration [FNA] is a valuable technique in the evaluation of thyroid nodules. A total of 182 FNA[s] of the thyroid performed at the Sultan Qaboos University Hospital were reevaluated and 153 were found to be adequate [84%]. The cytological results of FNA were divided into neoplastic and non-neoplastic groups. Subsequent histology was obtained in 53 patients with an intraoperative frozen section [FS] in 27 patients. Papillary carcinoma was found to be the most common, accounting for 70% of the cases with histological follow-up in the neoplastic group. The utility of performing FNA in all thyroid nodules and an intraoperative frozen section only in selected cases is discussed

Malignant peritoneal mesothelioma

Malignant mesothelioma is a rare tumour, especially when not associated with exposure to asbestos. Its diagnosis is difficult because of the non-specific clinical presentation and differential diagnostic problems mainly from peritoneal carcinoma and peritoneal metastasis. This report of a 60-year old omani woman illustrates these problems and emphasizes the role of modern imaging techniques and histochemical, immunohistochemical and ultrastructural studies to confirm its diagnosis