Introduction
Generalized eruptive histiocytosis (histiocytoma) (GEH) is a very rare cutaneous non-Langerhans cell histiocytosis, characterized by recurrent crops of small red to brown papules.
Case Presentation
A 58-year-old woman with an 8-month history of hundreds of symmetric yellow-brown flat-topped papules (Figure 1, A and B) came for dermatologist consultation. The lesions appeared in crops localized on the trunk and extremities. It was believed that the skin lesions were caused by trazodone and lithium, which were being used in the treatment of bipolar disorder. The medications were stopped, but the lesions continued to develop. Routine blood and urine analyses were unremarkable.
Figure 1.
(A,B) Symmetric yellow-brown, flat-topped papules localized on the trunk (A) and extremities (B). (C) Dermoscopic finding: orange-yellow homogeneous pigmentation, delicate linear branching, and serpentine vessels. Solitary, red clods are present in some lesions. (D) Dermoscopic finding after 3 months: partially regressed lesions reveal yellow background and linear serpentine vessels. (E) Focally dispersed small dermal granulomas composed of histiocytes and multinuclear giant cells with peripheral arrangement of nuclei (E,F) (H&E, ×100). (F) Focal emperipolesis is noted in giant cells (arrows) (H&E, ×400). (G) Positive immunohistochemical staining of CD68 in granulomas (magnification ×200). Immunohistochemically, granulomas presented with profile CD68+ CD163+/−, and CD1a−.
Dermoscopy was performed on one representative lesion on the lower leg. The histology was consistent with the diagnosis of GEH (Figure 1, C–G).
After GEH diagnostics, additional investigations were done. Hyperprolactinemia, hypercorticism, and hypofunction of the thyroid gland were detected. Abdominal ultrasonography and MRI of the sella turcica and hematological studies with biopsy of the bone marrow were without pathological findings. Three years from the first onset, the skin lesions mostly resolved, leaving hyperpigmented macules.
Literature Review
Seventy-four cases (58.1% males) of GEH have been published, including 24 (32.4%) children (Table 1 and Supplementary References, which are appended to the pdf). The average age was 30.5 years. In adults and children the average age was 43.2 years and 4.2 years, respectively. The most frequent body site was the trunk (86%), followed by the extremities (79%). The lesions resolved spontaneously from 2 weeks onward, but in rare cases persisted for 20 years. In 4 children the lesions evolved into xanthoma disseminatum; in 1 child the lesions coexisted with juvenile xanthogranuloma.
Table 1.
Clinical Characteristics of the Published Cases With Generalized Eruptive Histiocytosis (Histiocytoma) (GEH)
| Referencea | Age at Onset (yrs)b | Sex | Location | Course | Associated Finding | 
|---|---|---|---|---|---|
| Wise (1919)c | 22 | M | Trunk, proximal part of extremities | Lasted 20 years | None | 
| Glauberzon and Lebedeff (1952)c | 34 | F | Disseminated | Not defined | None | 
| Calas et al (1959)c | 52 | M | Face, trunk, extremities | Not defined | None | 
| Baccaredda-Boy (1960)c | 33 | M | Trunk, extremities, face, mouth | No data, died after 19 years | Mutilating polyarthritis | 
| Herzberg (1961)c | 30 | F | Trunk, extremities | Spontaneous regression after 13 years | Amenorrhea | 
| Winkelmann and Muller (1963) | 51 | F | Trunk, extremities | Number of lesions increased within 15 months | Osteoarthritis | 
| Winkelmann and Muller (1963) | 58 | M | Trunk, axillae, pubic area and penis, buccal mucosa | Increasing in number within 4 years | None | 
| Winkelmann and Muller (1963) | 38 | F | Face, trunk, extremities | Cleared gradually after 12 years | None | 
| Cramer (1963) | 25 | M | Disseminated | Resistant to steroids | None | 
| Pegum (1973) | 42 | M | Trunk, extremities | No regression after 2.5 years | High cholesterol | 
| Sohi et al (1979) | 49 | M | Generalized | Regressed in a few months, then recurred 2 years later | None | 
| Winkelmann (1980) | 3 months | F | Extensor limbs, buttocks | Persisted until at least 9 years old | Glaucoma and uveitis | 
| Caputo et al (1981) | 25 | M | Thorax, abdomen, inguinal fold, proximal extremities | Resolved spontaneously in 4 years | None | 
| Aso et al (1982) | 4 | M | Disseminated | Spontaneous regression of 80% lesions after 2 years | None | 
| Arnold et al (1982) | 32 | M | Disseminated | Persisted for 20 years | None | 
| Bobin et al (1983) | 22 | M | Trunk, extremities | Partial regression within 1 year | None | 
| Idikio and Hogan (1983) | 57 | F | Abdomen, pubic area, breasts, back, axillae, face | Unchanged in 9 years | Hyperlipidemia type IV | 
| Statham et al (1984) | 66 | F | Trunk, extremities, nasal mucosa | Death 18 months after the diagnosis from acute leukemia | Acute leukemia of monoblastic/histiocytic origin | 
| Caputo et al (1987) | 11 months | M | Trunk, neck, head, extremities | Disappeared in 5 years | None | 
| Caputo et al (1987) | 11 months | F | Face, trunk | Mostly regressed in 6 years | None | 
| Caputo et al (1987) | 10 months | M | Trunk, scrotum | Mostly regressed in 2 years | None | 
| Caputo et al (1987) | 44 months | F | Trunk, axillae, face | Mostly regressed in 3 years | None | 
| Shimizu et al (1987) | 24 | M | Cheeks, later generalized | Regressed in 1 year | None | 
| Sigal-Nahum et al (1987) | 7 | F | Face, buttocks, extremities | Spontaneous regression and new crops within few months | None | 
| Braun-Falco et al (1988) | 19 | M | Trunk, axillary, face, throat | Evolved into xanthoma disseminatum | None | 
| Grob et al (1988) | 25 | M | Face, axillary | Eruption persisted 2 years | None | 
| Umbert and Winkelmann (1989) | 67 | F | Face, trunk, arms | Slow progression within 9 years | Hypothyroidism, normolipemic xanthelasma, polyclonal gammopathy | 
| Ashworth et al (1990) | 21 | M | Disseminated, sparing mucosa | 8 years continual progression of the disease | Atopic dermatitis, asthma | 
| Saijo et al (1991) | 14 | F | Trunk | Within 14 months: partial regression with new lesions | None | 
| Stables and MacKie (1992) | 55 | F | Arms, trunk, upper thighs, face | Present for at least 24 months | None | 
| Izaki et al (1993) | 1 | M | Face, neck, upper arms | Persisted for next 5 years until spontaneous resolution | None | 
| Goerdt et al (1994) | 69 | M | Trunk, extremities | Persisted for at least 5 years | High cholesterol | 
| Repiso et al (1995) | 4 | M | Face, trunk, proximal extremities | Evolved into xanthoma disseminatum | Developed diabetes insipidus and brain infiltrations | 
| Gibbs and O’Grady (1996) | 41 | M | Face, arms, torso | Lesions persisted for 9 years | Diabetes mellitus type II | 
| Jang et al (1999) | 3 months | M | Face, trunk, groin, upper and lower limbs | Spontaneous regression within 2 months; no new lesions within 2 years | None | 
| Matsushima et al (1999) | 5 | F | Generalized | Spontaneous regression within 8 months | Rheumatic fever | 
| Wee et al (2000) | 9 | M | Trunk, proximal extremities | Spontaneous regression of some lesions with new crops | None | 
| Marzano et al (2002) | 33 | F | Trunk, extremities | Resolved within 6 months | None | 
| Wollenberg et al (2002) | 13 | F | Abdomen, trunk | Persisted for 3 years | Coexistence with skin lesions proven to be indeterminate cell histiocytosis | 
| Klemke et al (2003) | 59 | M | Trunk, neck, face, and thighs | Improved under aplasiogenic regimen | Acute monocytic leukemia | 
| Seward et al (2004) | 55 | M | Trunk, extremities | Several lesions resolved after cryotherapy | None | 
| Deng et al (2004) | 39 | M | Face, trunk, limbs | Spontaneously resolved within 6 months | Increased eosinophilia | 
| Mehravaran (2004) | 53 | F | Trunk, upper extremities | No follow-up | None | 
| Tamiya et al (2005) | 14 months | F | Trunk, extremities | Spontaneously resolved within 1 month | Immunoglobulin G, human herpesvirus 6 | 
| Vázquez-Blanco et al (2006) | 64 | M | Trunk, extremities, mucous membranes | Subsided after photochemotherapy, but reappeared | None | 
| Kiliç et al (2006) | 1 | M | Face, trunk, extremities | Stable for 12 months, partial regression after 41 months | None | 
| Lan Ma et al (2007) | 32 | F | Trunk, extremities, face | In 3 months resolved with PUVA | Eosinophilia in peripheral blood and in bone marrow cytology | 
| Tang et al (2007) | 36 | F | Trunk, abdomen, extremities | After 8 years, spontaneous regression of some lesions observed | None | 
| Fernández-Jorge et al (2007) | 41 | F | Trunk and arms | Spontaneously resolved in 11 months | Hypercholesterolemia | 
| Bajaj and Iqbal (2008) | 28 | M | Face, chest, axillae | Resolved after 1 week with liquid nitrogen | None | 
| Kwinter and DeKoven (2009) | 53 | F | Face, neck, arms | Resolved after 8 months with isotretinoin, then recurred | None | 
| Chern et al (2010) | 5 months | F | Face, trunk, arms, legs | Spontaneously resolved in 6 months | Mild leukocytosis | 
| Aggarwal et al (2010) | 61 | M | Trunk, arms, legs | Spontaneously resolved with relapses within 4 years | None | 
| Sharath Kumar et al (2011) | 23 | F | Face, trunk, arms, legs | Minimal resolution, persisted 5 years | None | 
| Attia et al (2011) | 48 | F | Upper limbs and trunk | Spontaneously resolved | None | 
| Montero et al (2012) | 80 | M | Trunk, abdomen | Resolved after 6 months | Chronic myelomonocytic leukemia | 
| Verma (2012) | 10 | M | Hands, feet, trunk | Coexistence with juvenile xanthogranuloma lesions | None | 
| Cardoso et al (2013) | 79 | M | Trunk, eyelids | Spontaneously resolved in 2 months | None | 
| Zamudio Vega et al (2013) | 8 | M | Face, upper extremities | 8 months unchanged | None | 
| Shon et al (2013) | 84 | M | Face, neck, arms | Died after 4 months | Chronic myelomonocytic leukemia | 
| Kazi et al (2014) | 23 | M | Lower extremities | No follow-up | None | 
| Ghandi et al (2015) | 28 | F | Face, trunk, extremities | Spreading within 2 years | None | 
| Ziegler et al (2015) | 20 | M | Trunk, extremities | Complete remission with imatinib | FIP1L1-PDGFRA-positive chronic eosinophilic leukemia | 
| Hansel et al (2015) | 60 | M | Trunk, extremities | Remission with PUVA and topical corticosteroids | None | 
| Mahajan et al (2015) | 60 | M | Extremities | No follow-up | None | 
| Wilk et al (2016) | 64 | M | Trunk, extremities | Unchanged for several years | None | 
| Piney et al (2016) | 28 | M | Face, trunk, extremities | Resistant to imatinib, interferon alpha, anakinra; resolved after PUVA therapy | Arthralgia | 
| Alperovich et al (2017) | 3 | F | Trunk, face | 6-month follow-up: CNS lesions-xanthomata | Diabetes insipidus | 
| Arif et al (2017) | 26 | F | Face, trunk, arms | Persisted and coalesced within 3 months | None | 
| Kar et al (2018) | 6 | F | Face, axillae, trunk | Spontaneously resolved | None | 
| Kaçar et al (2018) | 19 months | F | Diaper area, extremities, trunk | Spontaneously resolved | None | 
| Costin et al (2019) | 24 | F | Trunk, neck and proximal upper extremities | Unchanged after 1 year | None | 
| Takahashi et al (2019) | 1 | M | Trunk | After 1 year partially regressed | None | 
| Kobayashi et al (2019) | 7 months | M | Neck, trunk, extremities | 2-year follow-up; lesion evolved into xanthoma disseminatum; resistance to chemotherapy | Diabetes insipidus | 
Full references are provided in the supplementary content, which is appended to the pdf.
Age is given in years except where indicated as months.
In 1963 Winkelmann and Muller reported 3 cases of GEH, but some cases with cutaneous and histological abnormalities consistent with GEH were reported before their report, under different names (Sohi et al, Dermatologica. 1979;159(6):71–75; Bobin et al, Ann Dermatol Venereol. 1983;110(10):817–824).
Although GEH is a benign, self-healing eruption of non-Langerhans cell lineage, follow-up is necessary.
Two age groups of GEH patients are reported: up to 14 years and adults. Brain infiltrations and diabetes insipidus are reported in 3 (12.5%) children up to age 4 years with xanthomatous evolvement. In 5 (10.0%) of the published adult cases, hematological disorders of myeloid lineage such as acute monocytic/monoblastic leukemia (2 cases) or chronic myelomonocytic/eosinophilic leukemia (3 cases) are reported (Table 1). In preschool children, diabetes insipidus should be suspected if GEH evolves into xanthoma. In adults, hematological follow-up is suggested.
Clinical differential diagnosis of GEH includes other histiocytic disorders such as Letterer-Siwe disease, juvenile xanthogranuloma (multiple), papular xanthoma, and progressive nodular histiocytosis. Exanthema due to medications and viruses, with separate entity Gianotti-Crosti syndrome and early eruption of guttate psoriasis, are main differentials as well.
A case describing dermoscopy of GEH lesions resembling molluscum contagiosum in an infant has been published [1]. A homogeneous orange-yellow pattern with an erythematous border described as “setting-sun” was recognized. Histology revealed histiocytic cells with foamy xanthomatous cytoplasm [1]. The dermoscopic finding in our case presented with orange-yellow homogeneous pigmentation, delicate linear branching, serpentine vessels, and solitary, red clods. Histology revealed histiocytic cells forming granulomas.
The dermoscopic differential diagnosis of GEH is broad and encompasses juvenile xanthogranuloma, cutaneous sarcoidosis, necrobiosis lipoidica, granuloma annulare (palisading granuloma histological subtype), elastosis perforans serpiginosa, granulomatous rosacea, annular elastolytic giant cell granuloma, and rheumatoid nodules. Among infective diseases, lupus vulgaris, cutaneous leishmaniasis, borderline tuberculoid leprosy, and Majocchi granuloma are the most important differentials [2]. Combining clinical, dermoscopic, and histological findings is of greatest importance in any of the diseases mentioned.
Conclusions
Our case emphasizes the importance of dermoscopic examination in the everyday practice of dermatologists. Further studies of skin histiocytic disorders are required in order to establish all dermoscopic criteria.
Acknowledgment
The authors thank Mrs. Ana Ivkovic from the Institute of Oncology and Radiology of Serbia, Belgrade, Serbia, and Mr. William Russell-Edu from the European Institute of Oncology, Milan, Italy, for providing scientific literature.
Footnotes
Funding: None.
Competing interests: The authors have no conflicts of interest to disclose.
Authorship: All authors have contributed significantly to this publication.
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