Malignant melanoma with adjacent hutchinson's melanotic freckle in black Africans

Rippey, J. J.; Rippey, E

doi:10.3109/00313027709085246

Cited by 11 publications

(7 citation statements)

References 4 publications

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“…The overall it obtained for Lake Okeechobee (0.003-0.75 h" 1 ) sediments are in agreement with the results obtained for a-FeOOH (Atkinson et al, 1972) systems (Table 4). The k values obtained in this study, however, were much lower than those reported for noncalcareous sediments (Rippey, 1977;Furumai and Ohgaki, 1988) and higher than those reported for soils (Munns and Fox, 1976), kaolinite, and a-Al 2 O 3 systems. The differences in k values among the sediments (Table 4) could be explained by the differences in methodology and laboratory techniques (i.e., either batch or core experiments) and by differences in chemical and mineralogical composition between calcareous and noncalcareous systems.…”

Section: Phosphorus Sorptioncontrasting

confidence: 88%

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Influence of pH on Phosphorus Retention in Oxidized Lake Sediments

Olila

Reddy

1995

Soil Science Soc of Amer J

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Diel pH changes in lake waters resulting from high photosynthetic activity may regulate water-soluble P concentration (WSP) and P sorption by suspended sediments in shallow eutrophic lakes. Laboratory studies were conducted to determine the pH effect on P fractions and P sorption kinetics in oxidized sediment suspensions from two subtropical lakes (Lake Apopka and Lake Okeechobee, Florida). The P sorption rate was calculated for sediment suspensions adjusted to various pH levels: 6

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Section: Phosphorus Sorptioncontrasting

confidence: 88%

“…The second stage shows the decline in P sorption with increasing pH at moderate P levels (4.8-11 mmol P kg" 1 ). This suggests a typical adsorption mechanism controlled by Fe-Al oxides (Goldberg and Sposito, 1984) and clay minerals (Rippey, 1977). Pure samples of Fe-Al oxides have been reported to have a PZC at =8.0 (Barrow, 1984).…”

Section: Phosphorus Sorptionmentioning

confidence: 95%

Influence of pH on Phosphorus Retention in Oxidized Lake Sediments

Olila

Reddy

1995

Soil Science Soc of Amer J

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“…This statement is certainly more accurate than that of Rippey & Rippey (1977) who not only regard this lype of lesion as resembling HMFM clinically and histologically, but also as having a similar prognosis. In every other published account the prognosis of this type of melanoma is dismal.…”

Section: Nature Of a Lmmentioning

confidence: 75%

“…These often have a very bizarre appearance (Reed 1976, Arrington et al 1977, Coleman et al 1980, Feibleman et al 1980. Rippey & Rippey (1977) regard this preinvasive stale as identical with Hutcbinson's melanotic freckle. However, this is not so.…”

Section: J\cral-lentiginous Melanoma (Alm)mentioning

confidence: 99%

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The nature of melanoma. A critical review

McGovern

1982

J Cutan Pathol

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The main object of this review was to examine the various histogenetic types of melanoma in order to determine their nature. Nodular melanoma and superficial spreading melanoma differ in the more rapid growth of the former. For tumors of equal depth of invasion in patients of the same sex, the prognoses are similar. Clinical features with prognostic significance are sex, age, and site of the lesion. Women have a decided superiority in survival up to the age of about 50 years when their superiority declines. Survival rates for men also decline after the age of 50 years but to a lesser degree. Melanomas of the extremities have a better prognosis than melanomas of the axial regions. The histological feature of most prognostic significance is depth of invasion (thickness). Ulceration is partly bound to thickness of the lesion, but has an augmentative effect of its own which is related to rate of growth. Thin lesions with or without regression are often associated with meta‐stases. Melanomas arising in Hutchinson's melanotic freckle have a better prognosis than nodular or superficial spreading melanoma but there has not been any series large enough for definitive markers with prognostic significance lo be determined. A similar state pertains in palmar, plantar and subungual melanomas. The initial surgical approach in nodular and superficial melanoma should be based upon the thickness of the tumour, site of the tumour, and sex of the patient. The current classification of malignant melanoma is unsatisfactory. Melanoma arising in Hutchinson's melanotic freckle seems to be a distinct entity. Melanomas of other histogenetic types would be best classified according to site.

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Lentigo Maligna With Spread Onto Oral Mucosa

Kroumpouzos¹

2002

Arch Dermatol

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Background: Lentigo maligna (LM) is a form of melanoma in situ most often seen in white patients on sunexposed areas, primarily the head and neck. Spread of LM onto the conjunctiva has been reported. There have been no reports of LM extending onto oral mucosa. Observations: We report 4 cases of LM in white women with contiguous spread from perioral areas to oral mucosa. The locations of the primary lesions were the vermilion of the lip, vermilion and perioral skin, cheek, and cutaneous aspect of the lip. Three cases showed focal histopathologic evidence of invasion during the course of the disease. The lesions ran a prolonged course characterized by repeated recurrences after surgery. Three of

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Malignant melanoma with adjacent hutchinson's melanotic freckle in black Africans

Cited by 11 publications

References 4 publications

Influence of pH on Phosphorus Retention in Oxidized Lake Sediments

Influence of pH on Phosphorus Retention in Oxidized Lake Sediments

The nature of melanoma. A critical review

Lentigo Maligna With Spread Onto Oral Mucosa

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