Dermoscopic features of pigmentation in Laugier-Hunziker-Baran syndrome

Pagetoid dyskeratosis with a palmar localization: Rapid resolution following biopsy

BACKGROUND

Pagetoid dyskeratosis (PD), which is found in more than 2% of skin biopsy specimens, is accepted as a histopathological finding reflecting the abnormal keratinization process. However, to date, only a limited number of cases have been described to have brown pigmentation on the hands, triggered by friction, and present with pagetoid dyskeratosis as the only sign on histopathology and a parallel ridge pattern on dermoscopy.

AIM

To present and discuss the typical clinical, histopathological, and dermoscopic features of pagetoid dyskeratosis, and to draw attention to the spontaneous resolution following biopsy.

PATIENT

We present a case of pagetoid dyskeratosis with a palmar localization, which rapidly resolved following biopsy, in a patient with no history of friction.

RESULTS

PD is the only important histopathological finding in typical irregular pigmented lesions located in the hand. PD should also be considered in the differential diagnosis of lesions that show parallel ridge pattern on the hand. Two weeks after the biopsy, disappearance of the lesion may be due to the effect of inflammatory response revealed by biopsy.

CONCLUSIONS

Although the cause of this condition is not yet fully understood, most cases being associated with friction or rapid spontaneous resolution following biopsy, as in the current case, may indicate the reactive nature of the lesion. Further researches are required to be clarify etiology of PD.

Mystery behind labial and oral melanotic macules: Clinical, dermoscopic and pathological aspects of Laugier-Hunziker syndrome

Labial and oral melanotic macules are commonly encountered in a broad range of conditions ranging from physiologic pigmentation to a sign of an underlying life-threatening disease. Although Laugier-Hunziker syndrome (LHS) shares some features of labial and oral pigmentation with a variety of conditions, it is a benign and acquired condition, frequently associated with longitudinal melanonychia. Herein, the demographic, clinical, dermoscopic, and pathological aspects of LHS were reviewed comprehensively. The important differential diagnoses of mucocutaneous and nail pigmentation are provided. An accurate diagnosis is crucial to design a reasonable medical strategy, including management options, malignant transformation surveillance, and psychological support. It is important that clinicians conduct long-term follow-up and surveillance due to the potential risks of malignant transformation and local severe complications in some conditions.

Laugier-Hunziker syndrome: A case report

Laugier-Hunziker syndrome (LHS) is a rare, benign, acquired pigmentary condition mainly affecting lips, oral mucosa and acral area, frequently associated with longitudinal melanonychia. Herein, we reported a 45-year-old female case with LHS. The clinical, dermoscopic, histopathologic features of LHS were reviewed and the important differential diagnosis was discussed.

Laugier-Hunziker syndrome: case report and review of the literature

Laugier-Hunziker syndrome is a rare acquired disorder characterized by diffuse pigmented macules of the oral mucosa. Other mucosal and cutaneous surfaces may be affected, and nail involvement is frequent. A case of Laugier-Hunziker syndrome in a Greek female with multiple buccal and labial mucosal lesions and unusual conjunctival involvement is presented here. In addition, a thorough review of the English language literature of this rather under-recognized syndrome is included and the main differential diagnostic possibilities are discussed.