Eccrine porocarcinoma (EPC) is a rare skin adnexal malignancy with a high potential for metastases. The most common metastatic sites are the lymph nodes and lungs. CCutaneous metastasis is extremely rare, particularly the zosteriform variant, with fewer than 5 cases reported in the literature. Here, we report a unique case of EPC in a 71-year-old male, clinically presenting with multiple clusters of ulcerated nodules distributing as a zosteriform pattern throughout his upper left limb, along with draining lymphatic metastases and lymphedema.

We described a 58-year-old female diagnosed with zosteriform cutaneous metastases from breast carcinoma. She was initially diagnosed with herpes zoster. Correct diagnosis was obtained after pathological biopsy. Various forms of cutaneous metastases have various forms, which require careful discrimination by dermatologists to reduce the rate of misdiagnosis.

Lichen planus pigmentosus (LPP) is a rare chronic variant of lichen planus. LPP distribution tends to be symmetrical and is frequently seen on the face, neck, and trunk. Atypical clinical patterns of LPP, including segmental, zosteriform, and linear, were reported in the literature. Herein, we report a rare presentation of LPP in a 16- year-old female with a unilateral linear pattern along the Blascko lines.

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A case of phakomatosis pigmentovascularis (PPV) type III a with a zosteriform distribution of nevus spilus as the main manifestation was reported. A 41-year-old man was born with a zosteriform distribution of pigmented rash on the left half-body, namely upper limb, shoulder and back. Physical examination revealed light brown pigments in a giant zosteriform distribution on the extensor side of the left upper limb and the left shoulder and back, with scattered brown spots and patches of variant sizes on the surface, which are consistent with the appearance of nevus spilus (NS). A relatively small area of dark red patch occurred on the left anterior shoulder, which showed telangiectasia and fading after pressing. It was consistent with the performance of a port-wine stain (PWS). Dermoscopy showed a clearer appearance and localized fusion of blood vessels and pigmented patch. He has no systemic involvement. The patient was diagnosed with phakomatosis pigmentovascularis type Ⅲa. NS and PWS can be treated with lasers if required.

Zosteriform lichen planus is a variant of cutaneous lichen planus that may develop at the site of healed herpes zoster or may evolve spontaneously with no previous history of herpes zoster or varicella-zoster virus infection. Lichen planus is an immune-mediated disorder that affects the skin and mucous membrane. Nonetheless, its exact etiology remains unclear. The lesion consists of polygonal, pruritic, flat-topped papules that may coalesce to form a plaque. This is a case of a 39-year-old female presenting with a three-month history of pruritic skin lesion over the right side of her trunk. On dermatological examination, there were large, discrete, band-like, hyperpigmented, papular patches following Blaschko\'s lines on the right side of the trunk and abdomen. The histological examination of a biopsy taken from the lesion showed hypergranulosis, sawtooth rete ridges, band-like inflammatory infiltrate, confirming the diagnosis of lichen planus and was treated with topical steroids. Based on the findings, a planer, pruritic skin rash that follows Blaschko\'s lines distribution rather than dermatomal distribution should raise the suspicion of zosteriform lichen planus.

Cutaneous metastases occur in approximately 10% of oncology patients as a feature of a persistent solid tumor or the harbinger of recurrent neoplastic disease. However, they can be the presenting manifestation of an unsuspected visceral malignancy in one percent of previously cancer-free individuals. Metastatic skin lesions from breast carcinoma are diverse in their appearance. The clinical presentation of cutaneous metastases in three women with breast cancer is described and both the morphology of skin metastases caused by breast carcinoma and the conditions that are mimicked by breast cancer cutaneous metastases are reviewed. Skin metastases from breast carcinoma commonly appear as firm, flesh-colored to red, smooth or ulcerated or crusted, nodules, papules, and plaques on the ipsilateral chest wall and breast. However, unique sites of breast cancer cutaneous metastases are the eyelids, inframammary folds, ipsilateral lymphedematous arm, scalp, subungual nail bed, and umbilicus; in addition, skin metastases can occur in mastectomy scars and radiation therapy ports. Carcinoma erysipelatoides, carcinoma telangiectoides, and carcinoma en cuirasse are classic patterns of skin metastases that can be observed in breast cancer patients; carcinoma hemorrhagiectoides is a recently observed skin metastases pattern that has also been noted in oncology patients with breast carcinoma. The pleomorphic skin lesions of breast cancer metastases can masquerade as benign cutaneous lesions and tumors (such as a collision tumor, cyst, dermatofibroma, and milia-en-plaque), cutaneous malignancies (such as melanoma and non-melanoma skin cancers), infections (such as cellulitis, folliculitis, herpes zoster, and paronychia), reactive erythema (such as erythema annulare centrifugum, and urticaria), skin conditions (such as alopecia areata, dermatitis, hidradenitis suppurativa, and scleroderma), and vascular lesions (such as angiokeratoma, angiosarcoma, lymphangioma circumscriptum, purpura, and pyogenic granuloma). In addition, breast carcinoma cutaneous metastases can not only mimic other miscellaneous conditions such as erosions and ulcers, Paget\'s disease, and papillomatosis cutis lymphostatica but also have unusual morphology such as targetoid lesions or a sharply demarcated red infiltration of the nasal tip similar to a clown\'s nose. The possibility of a breast cancer cutaneous metastasis should be considered in the evaluation of a patient with breast cancer--and although less likely, in a cancer-free individual--who develops a new and/or a treatment-unresponsive cutaneous lesion. A biopsy of the skin lesion is necessary to confirm the diagnosis of breast cancer cutaneous metastasis.

Angioma serpiginosum is a rare benign nevoid disorder affecting the small vessels of the upper dermis. We are presenting a case of this rare disease in an 11-year-old girl who presented with this condition on abdomen in zosteriform pattern which is rare presentation and is the first of its type.

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