1/22. Blue rubber bleb naevus: case report and literature review.Blue rubber bleb naevus syndrome is a rare cutaneous-digestive angiomatosis, described first by William Bean in 1958. Today, there are more than 200 cases published. The dangers of this syndrome include angiomata in the brain, kidneys or lungs (due to vasculature obliteration by in situ thrombosis). patients are scanned with technetium-labelled red blood cells in order to identify the affected organs. Multiple techniques are used to treat the lesions by gastrointestinal endoscopy.- - - - - - - - - - ranking = 1keywords = naevus (Clic here for more details about this article) |
2/22. Combined nevi of the conjunctiva.OBJECTIVE: To report the clinical and histologic features of combined nevi of the conjunctiva, a type of nevus that is not uncommon in the skin but rarely has been reported in the conjunctiva. methods: Conjunctival nevi and melanomas in the files of the University of california at san francisco eye pathology Laboratory from 1984 to 1999 were reviewed for the presence of features of both standard nevocytic nevi and blue nevi. Clinical histories and, when available, clinical photographs were obtained. RESULTS: Thirty combined nevi were discovered between 1984 and 1999. One case before 1984 had been incorrectly diagnosed as a junctional nevus. The dendritic and spindle-shaped blue nevus cells had been overlooked because they were not recognized as distinct from the standard nevocytic nevus cells. The recognition of blue as well as a brown color, a deep as well as a superficial component in the lesion, or a history of pigmentation since birth may help to establish the correct clinical diagnosis and prevent an unnecessarily deep surgical resection. Although growth of the lesion or "satellites" in some may favor a clinical diagnosis of melanoma, no lesions in this series were malignant. CONCLUSION: Despite a paucity of reports of combined nevi of the conjunctiva in the medical literature, this type of nevus, a combination of a nevocytic and a blue nevus, is common and has been overlooked in the past.- - - - - - - - - - ranking = 5.9673519628188E-6keywords = spindle (Clic here for more details about this article) |
3/22. Epithelioid blue nevus occurring in children with no evidence of carney complex.We report two pediatric patients who had biopsies of solitary lesions diagnosed as epithelioid blue nevi. Histologically these lesions had wedge-shaped, heavily pigmented infiltrates extending to the subcutaneous fat. The infiltrate was composed of spindled and polyhedral cells that were nevomelanocytic cells with nuclear pleomorphism. Also noted were pigmented globular cells interpreted as melanophages. These lesions have the same characteristics as those blue nevi occurring in patients with carney complex. More recently, adult patients have been identified with similar nevi, but without evidence of carney complex. To our knowledge, pediatric patients with epithelioid blue nevi, but no evidence of carney complex have not been described previously.- - - - - - - - - - ranking = 5.9673519628188E-6keywords = spindle (Clic here for more details about this article) |
4/22. Common blue naevus with satellite lesions: possible perivascular dissemination resulting in a clinical resemblance to malignant melanoma.We report a case of common blue naevus with polymorphous guttate and linear satellite lesions, thereby mimicking peripherally spreading malignant melanoma. Histopathologic examination showed that the naevus cells are clustered around blood vessels in the primary as well as satellite lesions, suggestive of spreading of the naevus cells along the perivascular space. Such biological behaviour resulting in a clinical manifestation of a malignant melanoma-like lesion is a rarity in common blue naevus, a benign cutaneous disorder that is devoid of a malignant potential, and has not been described before.- - - - - - - - - - ranking = 1.6keywords = naevus (Clic here for more details about this article) |
5/22. Persistent and recurrent blue nevi.Persistence of common melanocytic nevi has been fairly well characterized, clinically and histologically. In contrast, persistence of blue nevi has been reported infrequently. To define this entity better, nine cases of biologically persistent and clinically recurrent blue nevi are described. The persistent lesions in four cases were spindle-fascicular blue nevi; one showed senescent or "ancient" change and one had additional deep penetrating/epithelioid blue nevus features with atypical changes worrisome for malignancy. These changes included increased cellularity, cellular pleomorphism, mitotic figures, and a lymphocytic infiltrate. Three were biphasic dendritic-sclerotic/spindle-fascicular blue nevi, one of which had atypical changes. One case was a dendritic-sclerotic ("common") blue nevus. The original histology in one case was unavailable, but the recurrence was a combined blue nevus. The interval from initial biopsy to biopsy of the recurrent lesion was often longer (mean 2.7 years) for recurrent blue nevi than for recurrent common compound or intradermal melanocytic nevi. In addition, in contrast to recurrent common melanocytic nevi, the recurrence, in at least one case, extended beyond the scar of the original excision. These cases demonstrated that blue nevi of all histiotypes and combinations are capable of persistence with clinical recurrence. The persistence usually was histologically similar to the original, but in some cases was more "cellular" because, for the most part, the excisions of the persistent lesion revealed a deeper spindle-fascicular ("cellular") component not evident in the original superficial biopsy. In two cases, the original blue nevus appeared completely banal, but the persistent/recurrent lesions were histologically distinct and demonstrated atypical histologic features. Yet, follow-up (average 3.7 years) supports benign biology. Clinical recurrence is often associated with malignant transformation in blue nevus, but this series demonstrates that malignant tumor progression is not necessarily the case. In the absence of necrosis en mass, marked cytologic atypia, and frequent mitotic figures, the described atypical morphologic parameters in previously biopsied small blue nevi are probably reactive and "pseudomalignant." awareness of this potential change may avoid diagnostic and prognostic errors.- - - - - - - - - - ranking = 1.7902055888456E-5keywords = spindle (Clic here for more details about this article) |
6/22. Combined nevi of the conjunctiva.PURPOSE: To report the clinical and histologic features of combined nevi of the conjunctiva, a type of nevus that is not uncommon in the skin but has rarely been reported in the conjunctiva. methods: Conjunctival nevi and melanomas from the files of the University of california, san francisco, eye pathology laboratory were reviewed from 1984 to 1999 for the presence of features of both standard nevocytic nevi and blue nevi. Clinical histories and, when available, clinical photographs were obtained. RESULTS: Thirty-one combined nevi were discovered during the 15-year period between 1984 and 1999. One case before 1984 had been incorrectly diagnosed as a junctional nevus. The dendritic and spindle-shaped blue nevus cells had been overlooked because they were not recognized as distinct from the standard nevocytic nevus cells. The recognition of a blue as well as a brown color, a deep as well as a superficial component in the lesion, or a history of pigmentation since birth may help to establish the correct clinical diagnosis and prevent an unnecessarily deep surgical resection. Although growth of the lesion or "satellites" in some patients may favor a clinical diagnosis of melanoma, none of the lesions in this series were malignant. CONCLUSION: Despite a paucity of reports of combined nevi of the conjunctiva in the medical literature, this type of nevus--a combination of a nevocytic and a blue nevus--is common and has been overlooked in the past.- - - - - - - - - - ranking = 5.9673519628188E-6keywords = spindle (Clic here for more details about this article) |
7/22. Cellular blue naevus of the scalp with brain invasion.A case of a 28 year old woman with an intracranial cellular blue naevus (CBN) which was believed to be the extension from a pigmented skin/scalp lesion is reported. There was no similar pigmented skin lesion noted on other parts of her body. Radical intervention, including wide excision of the affected skin of the scalp, removal of the underlying pigmented skull bone and wide excision of the pigmented dura, together with wide excision of the intracranial mass, were performed. The skin defect was covered by rotation flap and free skin graft. The dura was closed by grafting with fascia lata. The skull defect was left open and would be repaired later at a second planned surgery.- - - - - - - - - - ranking = 1keywords = naevus (Clic here for more details about this article) |
8/22. Epithelioid blue naevus of the genital mucosa: report of four cases.Epithelioid blue naevi are an unusual cytological variant of blue naevus that have been recently described mostly in patients with the carney complex, although they may also occur in isolation. This variant of blue naevus is composed of melanin-laden polygonal epithelioid melanocytes situated within the dermis. The neoplastic cells show no maturation with progressive depth of dermal infiltration and, in contrast with the usual stromal changes in blue naevi, epithelioid blue naevi exhibit no dermal fibrosis. We describe four cases of epithelioid blue naevus located on the genital mucosa in four patients with no evidence of the carney complex. Three male patients showed an epithelioid blue naevus on the mucosa of the glans penis and a female patient had a lesion of the right labium minoris. Histopathologically, the lesions consisted of entirely intradermal melanocytic naevi composed mostly of heavily pigmented epithelioid melanocytes involving the dermis of the genital mucosa. Immunohistochemically, in all cases, epithelioid melanocytes expressed immunoreactivity for S-100 protein, HMB-45, Melan-A and MiTF antibodies.- - - - - - - - - - ranking = 1.6keywords = naevus (Clic here for more details about this article) |
9/22. Blue naevus with satellitosis mimicking malignant melanoma.Blue naevus is an acquired benign melanocytic naevus. It is a firm, sharply defined dark blue to grey-black papule or nodule, which is likely to arise from the arrested dermal melanocytes in the dermis. In the last few years, blue naevus has attracted much attention due to the recognition of new entities and to its confusion with malignant melanoma. We report a 69-year-old man who developed a blue-black nodular lesion with satellitosis on his scalp. Although clinically it was thought to be a malignant melanoma, histopathological investigation and conservative methods such as dermatoscopy and power Doppler ultrasonography did not confirm this diagnosis. Histopathological examination excluded malignant melanoma, as there were no cellular atypia and mitotic activity in either the nodular lesion or the satellitosis. Doppler ultrasonography confirmed the benign nature of the lesion. Dermatoscopic examination showed homogeneous steel-blue pigmentation with individual blue globules, dots and some brown veils, and confirmed the histopathological diagnosis. To the best of our knowledge, our case is the third reported case of a blue naevus with satellitosis mimicking malignant melanoma.- - - - - - - - - - ranking = 1.6keywords = naevus (Clic here for more details about this article) |
10/22. rosette formation within a proliferative nodule of an atypical combined melanocytic nevus in an adult.rosette formation is a feature that has not been described as occurring in melanocytic neoplasms. We present such a unique case. A 59-year-old man presented with an asymptomatic, soft, hairy 3.0 x 2.0-cm pigmented lesion that had been present for many years in the right external ear, extending from the conchal bowl onto the antitragus area. Examination of histologic sections showed a proliferation of nonatypical and heavily pigmented melanocytes in the superficial dermis and around deep adnexal structures, characteristic of a congenital nevus. In other areas, pigmented spindled and dendritic cells infiltrated thickened collagen bundles in a pattern of a blue nevus. A nodular proliferation of epithelioid melanocytes was seen within the deep dermis and subcutaneous tissue. The periphery of the nodule merged with the surrounding nevus cells. Neoplastic cells with nuclear atypia, melanin pigment, pseudonuclear inclusions, and balloon cell change were present. In addition, there was rosette formation by the tumor cells, with a central aggregate of coarse cell processes. Neuroid cords were also noted. No prominent mitotic figures, necrosis, or significant inflammatory infiltrate were noted. The neoplastic cells were positive for S-100 protein, Mart-1, tyrosinase, neuron-specific enolase, and vimentin. HMB-45 and Ki-67 (MIB-1) labeled only rare neoplastic cells within the proliferative nodule. The tumor cells were negative for synaptophysin, protein gene product 9.5, CD57, epithelial membrane antigen, CD31, and CD34. The central cell processes of the rosettes were negative for trichome, type IV collagen, neurofilament protein, glial fibrillary acidic protein, and tyrosine hydroxylase. We also retrospectively examined 78 congenital nevi of 65 pediatric patients at our institution. rosette formation was not seen in any of these cases.- - - - - - - - - - ranking = 5.9673519628188E-6keywords = spindle (Clic here for more details about this article) |
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