Archives of Dermatology
 1987
DOI: 10.1001/archderm.123.7.865
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Pilomatricoma with melanocytic hyperplasia: an uncommon occurrence and a diagnostic pitfall

M. T. Zaim1
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Cited by 6 publications

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“…These tumours were constituted by nodules of epithelial cells, composed of matrical and supramatrical cells, surrounding clusters of ‘ghost’ or ‘shadow’ cells admixed with dendritic melanocytes. This tumour shows some resemblance to pilomatrixoma, of which pigmented variants have been reported, 1 but differs from the present case, since squamous cells with keratin pearls were absent.…”
Section: Discussioncontrasting
confidence: 46%
“…Pigmentation of epithelial neoplasm is well known and the majority of cutaneous tumours can harbour melanin pigment and/or melanocytes 1–8 . Pigmented non‐melanocytic tumours can be either the result of tumour colonization of normal melanocytes, 2,6,8,9 , the product of a neoplastic multidirectional differentiation, 3,10 or the expression of a collision tumour 11 …”
Section: Discussionmentioning
confidence: 99%
“…Pigmented non‐melanocytic tumours are skin lesions characterized by the presence of melanin and/or melanocytes within an epithelial neoplasm. Almost all the commoner epithelial tumours have been reported in their pigmented variant 1–8 . The biological behaviour of pigmented non‐melanocytic tumours is similar to that of their non‐pigmented counterpart 4,5 …”
Section: Introductionmentioning
confidence: 93%
See 2 more Smart Citations
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
“…These tumours were constituted by nodules of epithelial cells, composed of matrical and supramatrical cells, surrounding clusters of ‘ghost’ or ‘shadow’ cells admixed with dendritic melanocytes. This tumour shows some resemblance to pilomatrixoma, of which pigmented variants have been reported, 1 but differs from the present case, since squamous cells with keratin pearls were absent.…”
Section: Discussioncontrasting
confidence: 46%
“…Pigmentation of epithelial neoplasm is well known and the majority of cutaneous tumours can harbour melanin pigment and/or melanocytes 1–8 . Pigmented non‐melanocytic tumours can be either the result of tumour colonization of normal melanocytes, 2,6,8,9 , the product of a neoplastic multidirectional differentiation, 3,10 or the expression of a collision tumour 11 …”
Section: Discussionmentioning
confidence: 99%
“…Pigmented non‐melanocytic tumours are skin lesions characterized by the presence of melanin and/or melanocytes within an epithelial neoplasm. Almost all the commoner epithelial tumours have been reported in their pigmented variant 1–8 . The biological behaviour of pigmented non‐melanocytic tumours is similar to that of their non‐pigmented counterpart 4,5 …”
Section: Introductionmentioning
confidence: 93%
See 1 more Smart Citation
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
“…The clinical differential diagnosis includes pigmented basal cell carcinoma, malignant melanoma and hemangioma. Histologically, the appearance of reported cases 6,9,10 is quite similar and characterized by a dual cell population including admixed epithelial and melanocytic cells. The epithelial component contains matrical, supramatrical and 'shadow' or 'ghost' cells.…”
Section: Discussionmentioning
confidence: 92%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
“…Whether PM regress spontaneously is unknown 4 . There are several clinical types of PM: perforating, 3,5,15 bullous, 20,21 melanocytic, 22,23 giant, 7,24 keratoacanthomalike, 15,25 exophytic, 26 anetodermic, 27 lymphangiectatic, 17 multinodular, 18 malignant, 19,28,29 symmetrical involvement 30 and multiple 6,16,30–32 . Most PM do not cause clinical complications.…”
Section: Discussionmentioning
confidence: 99%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
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