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A Case of Exophytic Pilomatricoma Clinically Resembling Keratoacanthoma

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Dear Editor: Pilomatricoma is a benign cutaneous tumor which presents as solitary, slow-growing, firm nodule with normal overlying skin... Exophytic pilomatricoma, an uncommon subtype, shows distinctive features such as rapid development, reddish exophytic appearance, surface alteration suggestive of perforation, and relatively shallow location... At initial visit the mass measured approximately 10 millimeters in diameter... The patient did not recall any history of trauma prior to lesion appearance... Under the impression of keratoacanthoma partial wedge biopsy was performed... Considering the visual appearance and the histologic features we diagnosed the mass as exophytic subtype of pilomatricoma... Pilomatricoma is a common tumor especially among children but its accurate preoperative diagnosis is challenging due to clinical resemblance to various other tumors... This finding suggests that clinical resemblance to keratoacanthoma is much more unusual... So far, it has been reported in only 2 cases... In some cases of exophytic pilomatricoma when elimination of the tumor content occur they are more often referred to as perforating pilomatricoma... These findings can also be found in cases of perforating pilomatricomas... Due to rapid growth of the tumor clinicians have a shorter time to diagnosis... With surgical excision the recurrence rate is low... In one study average time to recurrence was 1.6 years, indicating the need for long term follow-up monitoring after the treatment.

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Dome-shaped mass in the glabella with brownish crust in the central portion. Mixture of erythematous and whitish color can be observed in the peripheral area.
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Figure 1: Dome-shaped mass in the glabella with brownish crust in the central portion. Mixture of erythematous and whitish color can be observed in the peripheral area.

Mentions: An 89-year-old female patient visited dermatology clinic because 3-month-old mass on her glabella started to increase in size abruptly. The lesion was firm dome-shaped mass with brownish crust in the center. The peripheral area of the mass showed irregular mixture of erythematous and whitish color (Fig. 1). At initial visit the mass measured approximately 10 millimeters in diameter. The patient did not recall any history of trauma prior to lesion appearance. Under the impression of keratoacanthoma partial wedge biopsy was performed.


A Case of Exophytic Pilomatricoma Clinically Resembling Keratoacanthoma
Dome-shaped mass in the glabella with brownish crust in the central portion. Mixture of erythematous and whitish color can be observed in the peripheral area.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5383765&req=5

Figure 1: Dome-shaped mass in the glabella with brownish crust in the central portion. Mixture of erythematous and whitish color can be observed in the peripheral area.
Mentions: An 89-year-old female patient visited dermatology clinic because 3-month-old mass on her glabella started to increase in size abruptly. The lesion was firm dome-shaped mass with brownish crust in the center. The peripheral area of the mass showed irregular mixture of erythematous and whitish color (Fig. 1). At initial visit the mass measured approximately 10 millimeters in diameter. The patient did not recall any history of trauma prior to lesion appearance. Under the impression of keratoacanthoma partial wedge biopsy was performed.

View Article: PubMed Central - PubMed

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

Dear Editor: Pilomatricoma is a benign cutaneous tumor which presents as solitary, slow-growing, firm nodule with normal overlying skin... Exophytic pilomatricoma, an uncommon subtype, shows distinctive features such as rapid development, reddish exophytic appearance, surface alteration suggestive of perforation, and relatively shallow location... At initial visit the mass measured approximately 10 millimeters in diameter... The patient did not recall any history of trauma prior to lesion appearance... Under the impression of keratoacanthoma partial wedge biopsy was performed... Considering the visual appearance and the histologic features we diagnosed the mass as exophytic subtype of pilomatricoma... Pilomatricoma is a common tumor especially among children but its accurate preoperative diagnosis is challenging due to clinical resemblance to various other tumors... This finding suggests that clinical resemblance to keratoacanthoma is much more unusual... So far, it has been reported in only 2 cases... In some cases of exophytic pilomatricoma when elimination of the tumor content occur they are more often referred to as perforating pilomatricoma... These findings can also be found in cases of perforating pilomatricomas... Due to rapid growth of the tumor clinicians have a shorter time to diagnosis... With surgical excision the recurrence rate is low... In one study average time to recurrence was 1.6 years, indicating the need for long term follow-up monitoring after the treatment.

No MeSH data available.


Related in: MedlinePlus