Last on the list: A diagnosis seldom considered in males

Stephy George¹, RM. Subbaiah², G. Dominic Rodriguez³

¹PG Resident, Kauvery Hospital, Tennur, Trichy, India

²General Physician, Kauvery Hospital, Tennur, Trichy, India

³Consultant Hemato Oncology, Kauvery Hospital, Tennur, Trichy, India

*Correspondence: domappa1966@gmail.com

Abstract

Autoimmune diseases are generally more common in women than men. Sex hormones, especially oestrogen (but also prolactin and testosterone), play important roles in these diseases. Oestrogens are generally considered to enhance autoimmunity and have multiple effects on the immune system through various cell types and molecular pathways. There is much evidence supporting the role of oestrogen in the pathogenesis of systemic lupus erythematosus (SLE); the disease occurs much more frequently in women, especially during the years of child-bearing potential, and commonly flares up during pregnancy. We report a case of SLE in a young male who presented with pyrexia of unknown origin.

Case Presentation

An 18-years-aged male presented with a two months history of pain in the joints, both small and large joints, predominantly involving knees, ankles, metatarsals, wrist, elbows, and proximal interphalangeal joints. He also had intermittent fever and loss of weight of about 7 kg over 2 months.

He was evaluated elsewhere, found to have leukopenia, thrombocytopenia, and raised ESR (40 mm/hr). Urine and blood cultures were sterile. Chikungunya IgM and IgG were negative. Dengue NS1 and IgM were negative. Echocardiogram was normal. HRCT of the thorax revealed subpleural ground-glass opacities in the right lower lobe. RT-PCR for COVID was negative. He was treated with hydroxychloroquine, doxycycline, and low-dose steroids and was discharged on day 4.

Despite steroids, he continued to have fever. He presented to our hospital 3 weeks later with a cough and severe pain in the right lower chest along with polyarthralgia and fever.

On evaluation, he had oral ulcers, bilateral submandibular, posterior cervical, axillary and inguinal lymphadenopathy. He also had a right pleural effusion.

Investigations revealed Hb, 13.5 g%; total count, 3900 cells/mm3 (polymorphs, 39%; lymphocytes, 34%; monocytes, 33%); platelet, 8000 cells/mm3; ESR, 11; Creatinine, 0.86; CRP-2.2. Uric acid, 6.3; total protein, 6.7 (albumin 3.3, globulin 3.4); unremarkable urine analysis. Ultrasound abdomen revealed mild splenomegaly, minimal ascites and bilateral mild pleural effusion.

We found a febrile young male with polyarthralgia, oral ulcers, bilateral pleural effusions with ascites, generalised lymphadenopathy with leukopenia and severe thrombocytopenia.

Our differential diagnoses were

lymphoma
leukaemia
disseminated tuberculosis
auto immune disorder

We proceeded with a lymph node biopsy and obtained urgent consultation from haematologist for severe bicytopenia. He observed that the peripheral smear did not suggest any malignancy. Urgent bone marrow assessment showed a reactive marrow with normal cell lines. No evidence of leukaemia or lymphoma in the marrow. Autoimmune workup was suggested by him. However, we waited for biopsy report for the final conclusion to exclude lymphoma.

RA factor (<10) and anti-CCP (0.54) were negative. C3 and C4 levels were low. ANA by immunofluorescence was strongly positive +++, speckled pattern. Antibodies to PCNA (proliferative cell nuclear antigen) and antimitochondrial antibody were positive. The direct coombs test was negative.

Diagnosis of Systemic Lupus Erythematosus was made. He fulfilled the 6/11 criteria (ACR 1997), for SLE (serositis, oral ulcers, arthralgia, blood abnormalities, ANA positivity, and immunological criteria (By 2019 EULAR/ ACR criteria he had a score of 26 points.)

He was started on corticosteroids. He improved well and was discharged with prednisolone 60 mg/day and hydroxychloroquine 400 mg/day.

Discussion

Systemic lupus erythematosus (SLE) is a prototypic autoimmune disease characterised by the production of antibodies to components of the cell nucleus in association with a diverse array of clinical manifestations. It is substantially more common in females of childbearing age, where the reported female: male ratio is 8-15:1. Prepubertal and postmenopausal ratios are much lower at 2-6:1 and 3-8:1 respectively [1,2].

Patients present with variable clinical features ranging from mild joint and skin involvement to life-threatening kidney, hematologic, or central nervous system involvement. The clinical heterogeneity of SLE and the lack of pathognomonic features or tests pose a diagnostic challenge for the clinician. To complicate matters, patients may present with only a few clinical features of SLE, which can resemble other autoimmune, infectious, or hematologic diseases.

The diagnosis of SLE has been dependent on criteria developed by ACR in 1982 and revised in 1997. This carried a sensitivity of 82.8% and specificity of 93.4% and almost every physician knows it by heart and applies the same at the bedside [3,4]. Over the years new criteria have emerged to obtain more specificity and sensitivity and also to make the diagnosis early [5]. The following Table 1 summarises the criteria.

Table 1. Single criteria in the four SLE classification criteria sets since 1982.

ACR 1982	ACR 1997	SLICC 2012	EULAR/ACR 2019
			Mucocutaneous
1. Malar rash		1. Acute cutaneous LE*	Acute cutaneous LE	6
		or SCLE	SCLE	4
2. Discoid rash		2. Chronic cutaneous LE*	Discoid LE	4
3. Photosensitivity
4. Oral ulcers		3. Oral ulcers	Oral ulcers	2
		or nasal ulcers
		4. Non-scarring alopecia	Non-scarring alopecia	2
5. Arthritis		5. Synovitis	Joint involvement	6
6. Serositis		6. Serositis	Serosal
a) Pleuritis		Pleuritis	Effusion	5
b) Pericarditis		or pericarditis	Acute pericarditis	6
7. Renal disorder		7. Renal	Renal
a) Persistent proteinuria		Proteinuria	Proteinuria	4
b) Cellular casts		or red cell casts
		Histology compatible with lupus nephritis	ISN/RPS II/V	8
		Histology compatible with lupus nephritis	ISN/RPS III/IV	10
8.Neurologic disorder		8. Neurologic	Neuropsychiatric
a) Seizures		Seizures	Seizure	5
b) Psychosis		Psychosis	Psychosis	3
		Mononeuritis multiplex
		Myelitis
		Peripheral or cranial neuropathy
		Acute confusional state	Delirium	2
9. Hematologic disorder			Hematologic
a) Hemolytic anemia		9. Hemolytic anemia	Coombs+ hemolytic anemia	4
b) Leukopenia		10. Leukopenia	Leukopenia	3
c) Lymphopenia		or lymphopenia
d) Thrombocytopenia		11. Thrombocytopenia	Thrombocytopenia	4
10. Immunologic disorder
a) LE cell preparation
			SLE-specific antibodies
b) Anti-DNA	a) Anti-DNA	12. Anti-dsDNA	Anti-dsDNA	6
c) Anti-Sm	b) Anti-Sm	13. Anti-Sm	Anti-Sm	6
d) False-positive syphilis serology	c) Anti-phospholipid	14. Anti-phospholipid	Anti-phospholipid	2
		15. Low complements	Low complement
			C3 or C4 low	3
			C3 and C4 low	4
		16. Coombs test without hemolytic anemia
11. ANA	11. ANA	17. ANA	Entry criterion ANA

The criteria for the diagnosis of SLE have been built upon the original criteria developed by the ACR in 1982. Revisions of the original criteria have enabled a sensitivity of 94.1% and specificity of 97.4% (EULAR/ACR 2019).

Diagnostic criteria which are still used at the bedside and one that every physician knows goes by the mnemonic MD SOAP BRAIN – based on the older ACR criteria.

M-Malar rash; D- Discoid rash; S-Serositis; O-Oral ulcers; A-Arthralgia; P-Photosensitivity; B-Blood disorder; R-Renal involvement; A-ANA positivity; I-Immunological phenomena; N-Neurologic disorder.

The latest criteria require ANA positivity as an entry criterion plus 7 clinical and 3 immunological domains.

Clinical domains	Immunological domains
1. Constitutional	1. ANA
1. Hematological	2. complement
1. Neuropsychiatric	3. SLE specific antibodies
1. Mucocutaneous 2.Serosal 3. Musculoskeletal 4. Renal

It is widely known that SLE is much more common in women than in men with a ratio close to 9:1 [6]. The increased frequency of SLE among women may be attributed to differences in the metabolism of sex hormones and/or GnRH [7].

SLE tends to run a more severe course in males than in females, with a worse prognosis [8]. Because of the predominance of women in most studies, little is known about the disease in men. Recent studies suggest that the impairment that occurs in older men has higher mortality in one year than women with SLE [9].

Table 2. SLE clinical phenotype differs between males and females

Characteristic	Males	Females
Incidence [10]	Less compared to females	Higher in females of childbearing age with the ratio of 8-15:1
Age of onset [11,12,13]	The mean age range was 26-38.4 years.	Median age range 26.3-31.9 years.
Clinical features [14,15,16]	Discoid rash, subacute cutaneous lesions, serositis more frequent. more severe renal involvement.	Arthritis, Raynaud's phenomenon, photosensitivity, malar rash, oral ulcers are more common
Neurologic manifestations [17]	More seizures and peripheral neuropathy	More neuropsychiatric manifestations and headaches
Hematologic manifestations [13,18]	More autoimmune hemolytic anemia and thrombocytopenia. lupus anticoagulant is more common. Thrombosis was more common.	More leukopenia
Flares [19]	Less frequent	More frequent
Relapses [19]	Less frequent	More frequent
Prognosis [9,20]	Worse prognosis. End organ damage is more common	Better prognosis than males.

Conclusion

To conclude, the application of the old criteria is still practical at the bedside to make a diagnosis of SLE. The new criteria allow for an earlier diagnosis in certain situations.

There is a delay in the diagnosis of SLE in males because it is seldom considered in the differential diagnosis. A delay in diagnosis results in more organ damage.

SLE runs a more severe course in males. Partial treatment or steroid use without indications and a proper diagnosis, adds to the confusion and continued patient suffering.

Early diagnosis and disease categorization, patient education about the disease, and appropriate timely treatment are essential in treating all autoimmune disorders.

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Dr. Stephy George

PG Resident

Dr. R. M. Subbaih

Consultant Hemato Oncology

Dr. G. Dominic Rodriguez

General Physician

Last on the list: A diagnosis seldom considered in males