Table of Contents

2017 Month : June Volume : 3 Issue : 1 Page : 11-13


Pallavi Goyal1, Ankit Mehra2, Manisha Nijhawan3, Savita Agarwal4

1Third Year Postgraduate Resident, Department of Skin and V. D., Mahatma Gandhi Medical College and Hospital, Sitapura, Jaipur.
2Second Year Postgraduate Resident, Department of Skin and V. D., Mahatma Gandhi Medical College and Hospital, Sitapura, Jaipur.
3Professor and HOD, Department of Skin and V. D., Mahatma Gandhi Medical College and Hospital, Sitapura, Jaipur.
4Assistant Professor, Department of Skin and V. D., Mahatma Gandhi Medical College and Hospital, Sitapura, Jaipur.

Corresponding Author:
Dr. Pallavi Goyal,
PG Hostel, Type IV Building,
Mahatma Gandhi Medical College
& Hospital, Jaipur.



Nevi are visible, circumscribed, long-lasting lesions of the skin reflecting genetic mosaicism.[1] Porokeratotic Eccrine Ostial and Dermal Ductal Nevus (PEODDN) is believed to be a congenital hamartoma of possible eccrine origin with no malignant potential.[2] It is a rare variant of porokeratosis having characteristic feature of cornoid lamella on histopathology. It is a disorder of keratinisation involving the intraepidermal eccrine duct (acrosyringium) and is characterised by eccrine hamartoma and cornoid lamella in pathology.[3] It is usually localised at the single extremity, while wider systematised distribution has been documented rarely. Till now, a few cases have been reported. Here, we are reporting 2 cases of this rare entity with one having childhood origin and other having adult onset.


PEODDN, Porokeratosis, Coronoid, Lamella, Keratinisation Disorder, Eccrine Hamartoma.

How to cite this article

Goyal P, Mehra A, Nijhawan M, et al. Porokeratotic eccrine ostial and dermal ductal nevus (PEODDN)- a rare entity in 2 cases. Journal of Evolution of Research in Dermatology and Venereology 2017; Vol. 3, Issue 1, Jan-June 2017; Page: 11-13.


Case 1

A 17-year-old boy who was otherwise healthy presented in our department with multiple asymptomatic keratotic papules and plaques over dorsum of right hand extending from middle finger to wrist area since 10 years. It initially started from dorsum of hand and then gradually spread in a linear fashion. Past and family history were not relevant.

On cutaneous examination: Numerous punctate pits having comedo-like plugs were seen admixed with the papules (Figure 1). Palms and soles were spared. No extracutaneous involvement was seen.

Skin biopsy showed orthokeratosis and parakeratotic column filling invaginations in the epidermis. Epidermis at the base of column showed loss of granular cells. Eccrine ducts seen at the base of invagination were consistent with acrosyringeal origin (Figure 2).





Case 2

A 20-year-old female presented with multiple small asymptomatic black/dark brown papules over hyperpigmented surface of upper abdomen since 3 months with pits in the centre. Past and family history were not relevant. A few lesions had coalesced to form plaques        (Figure 3). Histopathology showed orthokeratosis filling a deep cup shaped invagination in the epidermis. Epidermis at the base of column showed loss of granular cells replaced by cluster of dyskeratotic cells. Dermis show fibrosis, pigmentary incontinence and mild interstitial and perivascular lymphocytic infiltrate (Figure 4).

Figure 3

Figure 4


The term “PEODDN” was first given by Abell and Read in 1980.[4] However, it was described as comedo nevus of the palm by Marsden et al in 1979 and on scanning electron microscopy keratotic plugs occluding the eccrine ostia were present.[5] Other synonymous terms used for PEODDN are comedo nevus of the palm, linear eccrine nevus with comedones, palmar and plantar pseudocomedo porokeratotic sweat nevus and porokeratotic eccrine ostial and hair follicle nevus.[6] It usually appears at birth or early childhood.[7] Although, PEODDN is considered to be congenital, but a review of the literature showed us that the frequency of a late-onset variant may be as high as 26%.[8] It has a linear distribution following the Blaschko lines. Most common sites of presentation are palms and soles, but can involve other areas like trunk, neck and forehead. Duration between onset and diagnosis may vary from several months to years. Out of the 23 cases of PEODDN described in the review by Sassmannshausen et al, the ratio of M:F was 12:10 suggesting the gender ratio is almost equal.[6] It is usually asymptomatic, but may be associated with pruritus, hyperhidrosis or anhydrosis. Pathogenesis of PEODDN is still not clear. Hypothesis suggests that it might be caused by mutations in the GJB2 gene coding for the gap junction protein connexin 26 (Cx26) associated with KID or similar gap junction disorders.[9] Bergman et al demonstrated that it stained positively for carcinoembryonic antigen (CEA) in its lower course, but negatively in  the inner borders of the invagination from which the parakeratotic column arose which suggests that the epithelial structure in PEODDN is an abnormally keratinising epidermal invagination through which an acrosyringium-like duct traverses.[10]

There are rare case reports of PEODDN associated with conditions like hyperthyroidism, sensory polyneuropathy, breast hypoplasia, Bowen’s disease, deafness, developmental delay, seizure disorder, hemiparesis, scoliosis, alopecia, onychodysplasia and squamous cell carcinoma.[11] Co-occurrence with linear psoriasis has also been described.[12]

The mainstay of diagnosis is histopathology and its pathognomonic feature is multiple cornoid lamella-like parakeratotic columns arising over eccrine sweat ducts with dilated acrosyringium. Our diagnosis was made on the basis of clinical and histopathological correlation. Differential diagnoses include porokeratosis plantaris discreta, inflammatory linear verrucous epidermal nevus, nevus comedonicus, linear epidermal nevus, linear psoriasis, spiny keratoderma and linear porokeratosis. Nevus comedonicus was excluded by the absence of grouped undeveloped hair follicles filled with cornified debris devoid of hair shafts.[13]

Usually, the treatment is not effective. Various treatment options that have been tried in the past are topical agents like keratolytics, retinoids, steroids, calcipotriol, phototherapy and cryotherapy. Ultrapulse CO2 laser is comparatively effective and has better cosmetic results.[11]



  1. Happle R. What is a nevus? A proposed definition of a common medical term. Dermatology 1995;191(1):1-5.
  2. Cambiaghi S, Gianotti R, Caputo R. Widespread porokeratotic eccrine ostial and dermal duct nevus along Blaschko lines. Pediatr Dermatol 2007;24(2):162-7.
  3. Naraghi MM, Nikoo A, Goodarzi A. Porokeratotic eccrine ostial and dermal duct nevus. Case Rep Dermatol Med Article ID 953840, 2013;2013: p. 3.
  4. Abell E, Read SI. Porokeratotic eccrine ostial and dermal duct naevus. Br J Dermatol 1980;103(4):435-41.
  5. Marsden RA, Fleming K, Dawber RP. Comedo naevus of the palm - a sweat duct naevus? Br J Dermatol 1979;101(6):717-22.
  6. Sassmannshausen J, Bogomilsky J, Chaffins M. Porokeratotic eccrine ostial and dermal duct nevus: a case report and review of the literature. J Am Acad Dermatol 2000;43(2 Pt 2):364-7.

  7. Masferrer E, Vicente MA, Bassas-Vila J, et al. Porokeratotic eccrine ostial and dermal duct naevus: report of 10 cases. J Eur Acad Dermatol Venereol 2010;24(7):847-51.
  8. Valks R, Abajo P, Fraga J, et al. Porokeratotic eccrine ostial and dermal duct nevus of late onset: more frequent than previously suggested? Dermatology 1996;193(2):138-40.
  9. Easton JA, Donnelly S, Kamps MA, et al. Porokeratotic eccrine nevus may be caused by somatic connexin26 mutations. J Invest Dermatol 2012;132(9):2184-91.
  10. Bergman R, Lichtig C, Cohen A, et al. Porokeratotic eccrine ostial and dermal duct nevus. An abnormally keratinizing epidermal invagination or a dilated, porokeratotically plugged acrosyringium and dermal duct? Am J Dermatopathol 1992;14(4):319-22.
  11. Pathak D, Kubba R, Kubba A. Porokeratotic eccrine ostial and dermal duct nevus. Indian J Dermatol Venereol Leprol 2011;77(2):174-6.
  12. Yu HJ, Ko JY, Kwon HM, et al. Linear psoriasis with porokeratoticeccrineostial and dermal duct nevus. J Am Acad Dermatol 2004;50(5):S81-3.
  13. Bandyopadhyay D, Saha A, Das D, et al. Porokeratotic eccrine ostial and dermal duct nevus. Indian Dermatol Online J 2015;6(2):117-9.


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