Melanocitoma Epitelioide Pigmentado: Relato de Caso

Pigmented epithelioid melanocytoma is a rare, newly described melanocytic tumor that encompasses lesions previously classified as animal type melanomas and epithelioid blue nevus of the Carney complex. Pigmented epithelioid melanocytoma is a specific clinicopathological entity with particular clinical presentation and histological features. We present the case of a 5 year old female patient with a heavily pigmented papule on her right thigh that showed histological findings compatible with pigmented epithelioid melanocytoma and discuss the relevance /clinical significance of sentinel lymph node biopsy as a staging procedure in this particular neoplasm.Melanocitoma epitelioide pigmentado é um tumor raro, recentemente descrito que engloba lesões previamente classificadas como melanomas “tipo animal” e nevo azul epitelioide do complexo de Carney. Melanocitoma epitelioide pigmentado é uma entidade clinicohistopatológica específica com apresentação clínica e características histopatológicas particulares. Apresentaremos o caso de uma paciente do sexo feminino de 5 anos de idade com uma pápula densamente pigmentada em sua coxa direita que mostrou achados histológicos compatíveis com Melanocitoma epitelioide pigmentado e discutiremos a relevância/ significância clínica da biópsia de linfonodo sentinela como parte do processo de estadiamento dessa neoplasia em particular

Evaluating diagnostic accuracy of Ovarian instant frozen sections compared to delayed paraffin embedded permanent sections

Introduction: Frozen section is mainly performed to determine malignity, so it is of fundamental importance to evaluate the diagnostic accuracy of frozen sections performed for each group of tissues in order to reduce false diagnoses, unnecessary surgeries and following unwanted complications. This study is conducted to evaluate the diagnostic accuracy of frozen section performed on ovary tissue compared to permanent sections. Materials and Methods: In this retrospective study, we evaluate frozen sections performed at Taleghani hospital pathology department in five years and their results were compared with permanent sections’ results to calculate sensitivity, specificity, negative predictive value and positive predictive value. In cases which results were discordant, we check for probable reasons. Results: 83 species were evaluated from patients with a mean age of 42.9 years; the smallest was 19 and the oldest was 86 years old (Std. dev: 12.84). 75 cases of frozen sections were benign (90.4%) and 8 cases were malignant. 73 cases of permanent sections were benign (88%) and 10 cases were malignant (12%. Sensitivity, specificity, positive predictive value and negative predictive value rates were 66%, 100%, 100% and 96.55% respectively. Conclusions: This study shows the importance of cooperation between pathologist and surgeons that they can prevent unnecessary surgeries. In our study the only cases of discordancy were borderline tumors and the diagnostic accuracy for all other species were perfect.  &nbsp

Hybrid carcinoma of the salivary gland: salivary duct adenocarcinoma adenoid cystic carcinoma

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/73933/1/j.1365-2559.1999.00761.x.pd

Isolated fungus ball mimicking mucocele or frontal sinus tumour: a diagnostic pitfall

Frontal sinus fungus ball should be considered in the differential diagnosis of chronic, nonspecific forehead symptoms. To evaluate the underlying disease, computed tomography scans should first be performed, followed by magnetic resonance imaging if malignancy is suspected. It is essential to be aware of the possibility of an atypical fungus ball appearance on computed tomography and magnetic resonance imaging scans. If bony destruction and calcification coexist on radiological images, then endoscopic biopsy is an indispensable part of the diagnostic procedure, and should be performed to collect material for both histological and mycological analysis, and to aid surgical planning. In cases of sinus fungus ball, an endoscopic approach for biopsy may be curative

Maxillary fungus ball: zinc-oxide endodontic materials as a risk factor

open7openNICOLAI, Piero; MENSI, Magda; Marsili, F.; Piccioni, M.; SALGARELLO, Stefano Alessandro; GILBERTI, Maria Enrica; Apostoli, P.Nicolai, Piero; Mensi, Magda; Marsili, F.; Piccioni, M.; Salgarello, Stefano Alessandro; Gilberti, Maria Enrica; Apostoli, P

Angiomatoid giant cellular blue nevus of vaginal wall associated with pregnancy

<p>Abstract</p> <p>Background</p> <p>Blue nevi that arise from the Müllerian tract are rare melanocytic lesions. Several histopathologic variants of cellular blue nevi have been described. The angiomatoid variant is characterized by a vascular component, and is considered to be a rare variant. Few studies have explored the influence of pregnancy on melanocytic lesions.</p> <p>Case</p> <p>A 29-year-old woman was presented with a pigmented vaginal lesion that increased gradually during pregnancy. A full term gynecologic examination showed a tumor mass protruding into the vaginal canal. The mass was resected during cesarean-section under the clinical impression of vaginal hemangioma.</p> <p>Result</p> <p>Gross examination revealed a cystic mass measuring 6.0 × 4.3 × 3.5 cm, which was filled with dark friable material. Histologically, the mass showed a subepithelial cellular proliferation of heavily pigmented dendritic melanocytes with prominent vascular stroma. Cytologic pleomorphism, junctional activity, atypical mitosis, and necrosis were not found. The proliferation was immunoreactive for HMB-45, S-100 and melan-A, and non-immunoreactive for CD34, smooth muscle actin, and AE1/AE3. The MIB-1 proliferative index was less than 1%. The patient had a postoperative course without complication.</p> <p>Conclusions</p> <p>Angiomatoid giant cellular blue nevus arising from the vagina during pregnancy is extremely rare. The low proliferative index and absence of cytologic pleomorphism, or necrosis, supports a benign biological behavior. Clinical follow-up showed no evidence of recurrence at one year after the resection of the mass.</p

Isolated fungus ball mimicking mucocele or frontal sinus tumour: a diagnostic pitfall

Abstract Objective: To demonstrate the clinical, radiological and diagnostic pitfalls of managing an isolated frontal sinus fungus ball, and to compare with the literature. Material and methods: Retrospective analysis of two cases and literature review. Results: Isolated frontal sinus fungus ball is a rare cause of frontal sinus disease. We present two cases of isolated frontal sinus fungus ball which pre-operatively were suspected to be either a tumour or a mucocele. In both cases, cheesy, clay-like material was found intra-operatively within the frontal sinus, suggesting a fungus ball. Effective treatment included surgical debridement via an exclusively endoscopic or an external approach, variously. Final histopathological and mycological analysis revealed Aspergillus fumigatus. A literature review revealed 20 reported cases of isolated frontal sinus fungus ball, confirming the low prevalence of the disease. Conclusions: Frontal sinus fungus ball should be considered in the differential diagnosis of chronic, nonspecific forehead symptoms. To evaluate the underlying disease, computed tomography scans should first be performed, followed by magnetic resonance imaging if malignancy is suspected. It is essential to be aware of the possibility of an atypical fungus ball appearance on computed tomography and magnetic resonance imaging scans. If bony destruction and calcification coexist on radiological images, then endoscopic biopsy is an indispensable part of the diagnostic procedure, and should be performed to collect material for both histological and mycological analysis, and to aid surgical planning. In cases of sinus fungus ball, an endoscopic approach for biopsy may be curativ