Atypical presentation of burrowing bug pigmentation involving a non-acral site

“Transient pseudo‐lentigines sign” in burrowing bug pigmentation

“…Patients present, particularly during rainy season, with sudden appearance of asymptomatic pigmented spots that clear spontaneously. Akin to most arthropod‐related pigmentation, there is a predilection for acral areas but involvement of abdomen, back, and chest has also been observed 2,3 . The pigmented spots are small, pinpoint to a few millimeters in size, grouped or reciprocal macules, showing streaky shapes and tapering edges 4 .…”

“…Akin to most arthropod-related pigmentation, there is a predilection for acral areas but involvement of abdomen, back, and chest has also been observed. 2,3 The pigmented spots are small, pinpoint to a few millimeters in size, grouped or reciprocal macules, showing streaky shapes and tapering edges. 4 The few cases of burrowing bug pigmentation documented in the literature mostly describe acral lesions masquerading as acral melanoma or lentigines.…”

Clinico‐dermoscopic features of Cydnidae pigmentation – a cluster of three cases within a family

“…[3][4][5] The dermoscopic findings observed in CP and its differentials are explained in Table 1. [4][5][6] The parallel ridge pattern observed in our case has not been reported in other cases of CP published in the literature. Though parallel ridge pattern (accentuated pigmentation of ridges of skin markings) is 99% specific for acral melanoma, it has also been demonstrated in benign lesions like acral melanocytic nevus, acral blue nevus, acral pigmented macules of Peutz-Jeghers syndrome, and occupation-related pigmentation.…”

“…4 The differential diagnosis of CP includes eruptive lentigines, petechiae of dengue fever, darkling beetle (Tenebrionidae) pigmentation, millipede pigmentation, junctional melanocytic nevi, in-situ acral melanoma, pigmentation secondary to contact with irritant chemicals, acral pigmented macules associated with Peutz-Jeghers syndrome, pigmented purpuric dermatoses, tinea nigra, dermatosis neglecta, occupation-related pigmentation secondary to contact with para-phenylenediamine, black rubber, and black walnut. [3][4][5] The dermoscopic findings observed in CP and its differentials are explained in Table 1. [4][5][6] The parallel ridge pattern observed in our case has not been reported in other cases of CP published in the literature.…”

“…1 The lesions have a predilection for acral areas, but the involvement of the trunk is also known in our cases. 5 The lesions usually resolve without any treatment in 1-2 weeks. 4 The differential diagnosis of CP includes eruptive lentigines, petechiae of dengue fever, darkling beetle (Tenebrionidae) pigmentation, millipede pigmentation, junctional melanocytic nevi, in-situ acral melanoma, pigmentation secondary to contact with irritant chemicals, acral pigmented macules associated with Peutz-Jeghers syndrome, pigmented purpuric dermatoses, tinea nigra, dermatosis neglecta, occupation-related pigmentation secondary to contact with para-phenylenediamine, black rubber, and black walnut.…”