DefinitionThis section has been translated automatically.
Subungual bleeding of varying severity. The term "nail haematoma" is incorrect from an etiopathological point of view, as it is not a bleeding into the nail plate, but a subungual bleeding of different age under the nail plate. Nail hematomas have a differential diagnostic significance, as they must be clearly distinguished from subungual malignant melanoma.
EtiopathogenesisThis section has been translated automatically.
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Clinical featuresThis section has been translated automatically.
Differential diagnosisThis section has been translated automatically.
- Melanoma, malignes, subunguales: In a circumscribed subungual malignant melanoma, melanin is always (most important differential diagnostic sign) released to the nail plate. This leads to localized longitudinal nail pigmentation distal to the lesion (see Melanonychia striata longitudinalis below).
- Naevus, melanocytic, subungual: Identical clinical sign of Melanonychia striata longitudinalis.
- Glomus tumor: Appears subungual (frequent localization) as circumscribed, very unpleasantly painful, rather discrete blue to blue-grey discolorations.
- Other types of nail dyschromas (DD see there).
General therapyThis section has been translated automatically.
Note(s)This section has been translated automatically.
To confirm a clinical suspicion of nail hematoma, pigmented material can be obtained from the free edge of the nail or, after trepanation of the nail plate (e.g. punch biopsy of the nail plate), also from the underside of the nail for examination. Nail hematomas have hardly any oxygen contact, are not converted into hemosiderin and are therefore negative in iron staining. With the help of the peroxidase reaction a histochemical proof can be made.
Outgoing links (6)Glomus tumor; Melanonychia striata; Nail dyschromia; Nail hematoma; Nevus, melanocytic, subungual; Subungual melanoma;
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