DR [page 26] [Dermatology Reports 2012; 4:e9] Zosteriform metastases from colon carcinoma: an unusual pattern Paula Maio,1 Cristina Amaro,1 Ana Rodrigues,1 Adelaide Milheiro,2 Jorge Cardoso1 1Department of Dermalology and Venereology and 2Department of Pathology, Hospital de Curry Cabral, Lisbon, Portugal Abstract Cutaneous metastases of internal malignan- cies occur infrequently and the zosteriform spread of the skin lesions represents a rare entity. We report here a case of cutaneous metastases from a colon carcinoma clinically mimicked Herpes varicella-zoster. The litera- ture is also reviewed. Introduction Cutaneous metastases of internal malignan- cies occur infrequently and the zosteriform spread of the skin lesions represents a rare entity with only a few cases reported in the lit- erature. Skin metastases are more frequently seen as papules or nodules overlaying the skin that can show ulceration in later stages. The zosteri- form pattern of distribution of these lesions is a particular and an even rarer form of presen- tation. The authors report a case in which cutaneous metastases from a colon carcinoma clinically mimicked Herpes varicella-zoster. The corre- sponding literature is also reviewed. Case Report A 72-year-old-man presented with a six-week history of small papules and plaques limited to the inframammary region and left flank deny- ing pruritus or pain with respect to this specif- ic lesions. He had been previously diagnosed with a Herpes varicella-zoster infection by a general practitioner and was treated with oral valacy- clovir, 1000 mg three times a day. After the third day of therapy, he described clinical wors- ening and the additional appearance of multi- ple papules with similar morphology. The patient had a known medical history of hemicolectomy for adenocarcinoma of the colon 5 years before and was being followed up regularly for known loco-regional lymph node metastasis (Modified Dukes staging system C2 and T3N1M0). He had been treated with adju- vant chemotherapy with 5-fluourouracil and folinic acid until two months before the time of evaluation at our clinic. Clinical examination revealed patches, papules and small nodules limited to the skin on a background of erythema. The lesions had a zosteriform distribution pattern (Figure 1). The histopathological examination revealed infiltration by adenocarcinoma that was con- sistent with colorectal origin, showing an immunostaining that was CK 20 positive and CK7 negative (Figures 2 and 3). The search for varicella zoster virus DNA was negative. Regarding treatment and follow-up, the area was too extensive to excise and the concomitant existence of multiple lesions was not suitable for surgical removal. The patient returned for systemic chemotherapy with capecitabine with slight improvement of the preexisting lesions. This partial remission was maintained for nine months until progression of the systemic dis- ease, resulting from the patient death. Discussion and Conclusions The pattern of presentation of zosteriform cutaneous metastasis is rare and should be included in the differential diagnosis of zoster- iform eruptions in immunocompromised patients.1,2 The common clinical characteris- tics are mainly of a topographic nature, with lesion distribution along dermatomes. The skin lesions can be heterogeneous, including papular, nodular or vesicobullous forms.3,4 Cutaneous metastasis is defined as cancer spreading through the blood stream or lym- phatic system to involve the skin.5,6 Cutaneous involvement by direct extension of the tumor or iatrogenic implantation is normally exclud- ed from this specific definition. The mechanisms that might predispose cer- tain types of internal malignancies to give rise to cutaneous metastasis have rarely been dis- cussed in the literature. In recent years, chemokines and their receptors have been shown to mediate tumorigenesis and the metastasis spreading process.7 One proposal mechanism for cutaneous metastization is the expression of the chemokine receptor CCR10, which is involved in cutaneous metastasis of melanomas by mediating the survival, migration and growth of melanoma cells. The ligand CCL27/CTACK is a skin-specific chemokine that is expressed by epidermal keratinocytes. These interactions (CCR10 on tumor cells and CCL27/CTACK on the epidermis) may mediate the colonization by melanoma cells of non-primary cutaneous sites.7,8 Other potentially implicated chemokines include CXCR4, which has been shown to be of major importance on not only the growth, angiogenesis and invasion of cutaneous basal cell carcinomas but also in the skin- homing mechanisms of Sézary cells.7,9 The molecular mechanisms by which tumor metastasis occurs, are complex and incom- pletely understood. Because the majority of cutaneous metastasis is found in the dermis, it is probable that the interaction between tumor cells and dermal and epidermal factors may play a crucial role in the skin-homing mechanism of metastatic cells.7 Different internal malignancies metastasize to the skin with different frequencies.10,11 The dermis may provide a favorable environment for the colonization and survival of metastatic breast carcinoma, as cutaneous adnexa and lactiferous ducts share similar embryonic ori- gins. This may provide at least a partial expla- nation for the occurrence of a higher rate of skin metastasis of breast adenocarcinoma compared with adenocarcinomas of the gas- trointestinal tract. Usually, the median survival after diagnosis is approximately six months although it was slightly higher in the case of our patient.12,13 The vast majority of cases exhibit a poor prog- nosis and an upgrading of the tumor staging. We found that most of the reported cases in the literature (about one third) had previous been medicated with antiviral therapy before the correct diagnosis was made.12-14 The high degree of clinical suspicion and the histopathological examination are therefore essential for diagnosis and the correct thera- peutic approach. Dermatology Reports 2012; volume 4:e9 Correspondence: Paula Maio, Department of Dermalology and Venereology, Hospital de Curry Cabral, Lisbon, Portugal. E-mail: paulamaio@gmail.com Key words: cutaneous metastases, zosteriform, skin-homing mechanisms. Conflict of interests: the authors report no poten- tial conflict of interests. Received for publication: 29 October 2011. Revision received: 19 November 2011. Accepted for publication: 7 December 2011 This work is licensed under a Creative Commons Attribution NonCommercial 3.0 License (CC BY- NC 3.0). ©Copyright P. Maio et al., 2012 Licensee PAGEPress, Italy Dermatology Reports 2012; 4:e9 doi:10.4081/dr.2012.e9 No n- co mm er cia l u se on ly [Dermatology Reports 2012; 4:e9] [page 27] Several theories have been proposed to explain the pathogenic mechanism by which zosteri- form dissemination occurs, but none was ade- quately proven to date.12,14 Additional studies and proper biological profiling of the tumor cells may allow for better understanding of this pathogenesis and for the also proposal of new biological therapeutic targets. References 1. Lookingbill DP, Spangler N, Sexton FM. Skin involvement as the presenting sign of internal carcinoma: a retrospective study of 7316 can- cer patients. J Am Acad Dermatol 1990;22:19- 26. 2. White JW Jr. Evaluating cancer metastatic to the skin. Geriatrics 1985;40:67-73. 3. Augustin G, Kekez T, Bodgdaria B. Abdominal popular zosteriform cutaneous metastasis from endometrial carcinoma. Int J Gynaecol Obstet 2010;110:74. 4. Manteaux A, Cohen PR, Rapini RP. Zosteriform and epidermotropic metastasis. Report of two cases. J Dermatol Surg Oncol 1992;18:97-100. 5. Ahmed I, Holley KJ, Charles-Holmes R. Zosteriform metastasis of colonic carcinoma. Br J Dermatol 2000;142:182-3. 6. Bauzá A, Redondo P, Idoate MA. Cutaneous zosteriform squamous cell carcinoma metasta- sis arising in an imunocompetent patient. Clin Exp Dermatol 2002;27:199-201. 7. Murakami T, Cardones AR, Finkelstein SE, et al. Immune evasion by murine melanoma mediated through CCR10 chemokine receptor. J Exp Med 2003;198:1337-47. 8. Cuerda E, Sanchez F, Mansilla I, et al. Malignant melanoma with zosteriorm metas- tases. Cutis 2000:312-4. 9. Blanchi L, Orlandi A, Carboni I, et al. Zoateriform metastasis of occult bronchogenic carcinoma. Acta Derm Venereol 2000;80:391-2. 10. Werchau S, Hartschuh W, Hartmenn M. Zosteriform metastasis of endometrial cancer. Eur J Dermatol 2009;19:401-2. 11. Shafqat A, Viehman GE, Myers SA. Cuatneous squamous cell carcinoma with zos- teriform metastasis in a transplant recipient. J Am Acad Dermatol 1997;37:1008-9. 12. Savoia P, Fava P, Deboli T, et al. Zosteriform cutaneous metastases: a literature meta-analy- sis and a clinical report of three melanoma cases. Dermatol Surg 2009;35:1355-63. 13. Hu SC, Chen GS, Wu CS, et al. Rates of cutaneous metastases from different internal malignancies: experience from a Taiwanese medical center. J Am Acad Dermatol 2009;60:379-87. 14. Niiyama S, Satoh K, Kaneko S, et al. Zosteriform skin involvement of nodal T-cell lymphoma: a review of the published work of cutaneous malignancies mimicking herpes zoster. J Dermatol 2007;34:68-73. Brief Report Figure 1. Clinical presentation with zoster- iform pattern distribution. Figure 2. Histhopatology (Hematoxylin and Eosin 10¥). Figure 3. Immunohisthopatology showing CD20 positivity. No n- co mm er cia l u se on ly