Angiosarcoma, epitheloid. condition after surgical removal of the nail for tissue sampling. bleeding tumour grown under the big toe nail, livid to brownish-red. rapid organ metastasis with lethal outcome within 6 months.
hematoma, nail hematoma. blue-blackish, sharply defined pigmentation (here of the big toe nail) due to a previous traumatic event. no distal stripy nail discoloration. the absence of distal stripy nail changes excludes the important differential diagnoses "subungual malignant melanoma" and "subungual melanocytic nevus".
Nail hematoma: sharply limited brownish discoloration of the nail; no streaky distal pigmentation of the nail (important differential diagnostic distinction to a malignant melanoma).
Nail hematoma: since exactly 6 weeks existing (trauma reminding), sharply forward limited blue-black discoloration of the big toe nail with discoloration of the epinychium; the sharp, here diagonally running dividing line without distal stripe-shaped discoloration of the nail matrix excludes a malignant melanoma!
Nail hematoma: since exactly 6 weeks existing (trauma recallable), sharply forward limited blue-black discoloration of the big toe nail (marked by arrows and line) with discoloration of the epinychium (circle); arrow (right) indicates a streaky (still red) apparently fresher bleeding
Mlelanom malignes acrolentiginous: Subungual malignant melanoma. Characteristic is the stripy growth through the entire length of the nail. The arrow marks the so-called Hutchinson sign.
Melanoma, malignant, acrolentiginous, subungual and paraungual, black pigmented tumor in the fingernail area, advanced stage with destruction of the nail.
Melanonychia striata longitudinalis: DD- subungual malignant melanoma; look for the discoloration of the cuticle (so-called Hutchinson's sign), as an indication of involvement of the nail root
Comedone-like keratosis follicularis (see there): in contrast to classical comedones, keratosis follicularis lacks sebaceous gland hyperplasia ; keratosis follicularis is a follicular, "dry horn graft" which does not occur in the seborrhoeic zones but mainly on the side of the extremities.
Comedo: multiple, chronically stationary, 0.5-1 mm large, firm, asymptomatic, grey, rough follicular papules with enlarged follicles, localized in the nasolabial fold; sebaceous content can be expressed on pressure.
basal cell carcinoma (overview): basal cell carcinoma pigmented. superficial (superficial), multi-segmental, symptomless, partly smooth, partly scaly plaque. arrows mark the pigmented nodular structure in the marginal area. encircles the prominent marginal structure in the "depigmented" part of the tumor. differential diagnosis excludes a malignant melanoma of the SSM type.
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