Early Symptomatic Congenital Syphilis: Complete ICD-11 Coding Guide [1A60.0](/en/code/1A60.0)
1. Introduction
Early symptomatic congenital syphilis represents one of the most severe manifestations of vertical transmission of Treponema pallidum pallidum, a gram-negative bacterium responsible for syphilis. This condition affects newborns and children up to two years of age, resulting from untreated or inadequately treated maternal infection during pregnancy. The disease manifests through a characteristic set of clinical signs that include premature delivery, hepatosplenomegaly, skeletal abnormalities, and bullous skin lesions, constituting a clinical presentation that requires immediate recognition and urgent therapeutic intervention.
The clinical importance of this condition transcends the individual impact on the pediatric patient, representing a sensitive indicator of prenatal care quality and maternal-fetal screening programs. Congenital syphilis is considered a preventable condition when there is adequate access to prenatal care and timely maternal treatment. Its persistence in various regions of the world reflects challenges related to access to health services, adherence to prenatal care, and the effectiveness of serological screening programs during pregnancy.
From an epidemiological perspective, congenital syphilis remains a relevant global public health problem, with significant variations in prevalence among different regions and socioeconomic contexts. Accurate coding through ICD-11 code 1A60.0 is fundamental for adequate epidemiological monitoring, allowing identification of trends, evaluation of the effectiveness of preventive interventions, and directing resources to vulnerable populations. Furthermore, correct documentation facilitates continuity of care, clinical research, and appropriate allocation of diagnostic and therapeutic resources.
2. Correct ICD-11 Code
Code: 1A60.0
Description: Early symptomatic congenital syphilis
Parent category: 1A60 - Congenital syphilis
Official definition: Disease affecting newborns and children up to 2 years of age caused by gram-negative bacterium Treponema pallidum pallidum in utero. This disease is characterized by premature delivery, hepatosplenomegaly, skeletal abnormalities, and bullous skin disease. Transmission is vertical.
This specific code within the ICD-11 classification is intended exclusively for cases of congenital syphilis that manifest clinically in the first two years of life, presenting evident signs and symptoms of infection. The classification as "early" refers to the period of disease manifestation, differentiating it from late forms that emerge after two years of age. The qualifier "symptomatic" is crucial, as it distinguishes this presentation from latent forms, in which there is serological evidence of infection without apparent clinical manifestations.
The hierarchical structure of the code reflects the systematic organization of ICD-11, where 1A60.0 is a specific subcategory within the broader group of congenital syphilitic infections. This precision in coding allows not only adequate epidemiological recording, but also facilitates comparative studies, analysis of clinical outcomes, and evaluation of therapeutic protocols in different care settings.
3. When to Use This Code
Code 1A60.0 should be applied in specific clinical situations where there is diagnostic confirmation of congenital syphilis with symptomatic manifestations in the first two years of life. Below, we present detailed practical scenarios:
Scenario 1: Newborn with characteristic skin lesions A three-week-old infant presents with bullous rash on the palms and soles of the feet, associated with perioral desquamation. The mother had irregular prenatal care and did not undergo adequate serological screening. Treponemal and non-treponemal tests of the newborn are reactive with titers higher than maternal titers. This characteristic clinical presentation with laboratory confirmation justifies the use of code 1A60.0.
Scenario 2: Infant with hepatosplenomegaly and radiological findings A two-month-old child is evaluated for abdominal distension and irritability. Physical examination reveals hepatomegaly of 4 cm and splenomegaly of 3 cm below the costal margins. Long bone radiographs demonstrate osteochondritis and periostitis. Maternal history reveals untreated syphilis during pregnancy. Infant serology confirms active infection. Code 1A60.0 is appropriate due to the presence of evident clinical manifestations.
Scenario 3: Premature newborn with pneumonia alba A 34-week newborn presents with early respiratory distress and chest radiograph suggestive of interstitial pneumonia. Investigation reveals mother with untreated positive VDRL. Infant examination shows serosanguineous rhinorrhea and hepatosplenomegaly. Serological tests confirm congenital syphilis. Prematurity associated with respiratory and systemic manifestations characterizes the early symptomatic presentation.
Scenario 4: Infant with hemolytic anemia and prolonged jaundice A six-week-old child with persistent jaundice since the neonatal period, cutaneomucous pallor, and hepatosplenomegaly. Laboratory investigation reveals hemolytic anemia with negative Coombs test, thrombocytopenia, and elevated liver enzymes. Maternal history of inadequately treated syphilis and infant serology confirm the diagnosis of symptomatic congenital syphilis.
Scenario 5: Newborn with syphilitic rhinitis and lymphadenopathy A two-week-old neonate presents with persistent nasal obstruction with serosanguineous discharge, feeding difficulty, and generalized lymphadenopathy. Physical examination also reveals perioral fissures and discrete hepatosplenomegaly. Mother with late diagnosis of syphilis in the third trimester without complete treatment. Serological confirmation justifies code 1A60.0.
Scenario 6: Infant with Parrot's pseudoparalysis A four-month-old child with painful limitation of movements in the right upper limb, irritability with handling, and localized edema. Radiograph demonstrates osteochondritis and periostitis of the humerus. Investigation reveals maternal history of syphilis and positive infant serology with elevated titers. The symptomatic osteoarticular manifestation characterizes the early symptomatic form of the disease.
4. When NOT to Use This Code
It is fundamental to recognize situations where code 1A60.0 is not appropriate, avoiding coding errors that compromise epidemiological and administrative records:
Early latent congenital syphilis: When there is serological evidence of congenital infection in a child under two years of age, but without any apparent clinical manifestation, the correct code is 1A60.1. The absence of symptoms is the fundamental differential criterion. For example, an eight-month-old infant with positive treponemal serology, but without hepatosplenomegaly, skin lesions, radiological changes, or any other clinical sign should be coded as latent form.
Late manifestations of congenital syphilis: When symptoms appear after two years of age, different codes should be used. Late congenital syphilitic ocular disease (1A60.2) applies to ophthalmological manifestations that appear after this period, such as interstitial keratitis. Late congenital neurosyphilis (1A60.3) refers to neurological involvement with late manifestation, including general paresis of the insane and juvenile tabes dorsalis.
Acquired syphilis in children: Although rare, syphilis can be acquired by children through routes other than vertical transmission. In these cases, the appropriate codes are those for acquired syphilis, not congenital. The epidemiological history and clinical context are essential for this differentiation.
Other congenital infections with similar presentation: Conditions such as congenital toxoplasmosis, congenital cytomegalovirus infection, congenital rubella, and neonatal herpes can present overlapping clinical manifestations, including hepatosplenomegaly, skin lesions, and prematurity. Specific laboratory confirmation is indispensable for correct coding, and these conditions have their own codes in ICD-11.
False-positive serological reactions: Occasionally, non-treponemal tests may present nonspecific reactivity in newborns due to maternal autoimmune conditions or other clinical situations. Without confirmation through treponemal tests and without compatible clinical manifestations, code 1A60.0 should not be applied.
5. Coding Step by Step
Step 1: Assess diagnostic criteria
The diagnosis of symptomatic early congenital syphilis is based on a combination of clinical, laboratory, and epidemiological criteria. Initially, maternal history of syphilis during pregnancy should be verified, including treatment received, adequacy of therapy, and serological response. Investigation of the newborn or infant should include thorough physical examination seeking characteristic manifestations such as bullous or maculopapular skin lesions, hepatosplenomegaly, serosanguineous rhinitis, lymphadenopathy, jaundice, edema, and pseudoparalysis.
Laboratory evaluation is fundamental and should include both treponemal and non-treponemal serological tests. Non-treponemal test titers in the infant should be compared to maternal titers, being suggestive of active infection when four times higher. Complete blood count may reveal anemia, thrombocytopenia, and leukocytosis. Radiographs of long bones are essential to identify osteochondritis, periostitis, and characteristic metaphyseal alterations. Cerebrospinal fluid analysis should be performed to evaluate possible neurosyphilis, even in cases without evident neurological manifestations.
Step 2: Verify specifiers
After confirming the diagnosis, it is necessary to adequately characterize the clinical presentation. The child's age must be less than two years for classification as early form. The presence of symptoms must be clearly documented, differentiating from latent forms. The severity of manifestations must be recorded, including extent of skin lesions, degree of hepatosplenomegaly, presence of hematological involvement, radiological alterations, and involvement of multiple organ systems.
Documenting the presence of specific complications is important, such as alba pneumonia, nephrotic syndrome, neurological involvement, ophthalmological alterations, or cardiovascular manifestations. Treatment response should also be monitored through serial clinical evaluations and serological follow-up, although this does not alter the initial code, it contributes to complete case documentation.
Step 3: Differentiate from other codes
1A60.1 - Early congenital syphilis, latent form: The fundamental difference lies in the absence of clinical manifestations. While 1A60.0 applies to cases with evident symptoms, 1A60.1 is used when there is only serological evidence of infection in an asymptomatic child under two years of age. For example, a ten-month-old infant with positive treponemal tests and elevated VDRL titers, but without any physical examination findings, normal radiographs, and without laboratory alterations, should be coded as 1A60.1.
1A60.2 - Late congenital syphilitic oculopathy: This code applies specifically to ophthalmological manifestations of congenital syphilis that emerge after two years of age, with interstitial keratitis being the most characteristic presentation. The temporal differentiation is clear: manifestations in the first two years use 1A60.0 (if there are ocular symptoms associated with other manifestations) or specific codes if ocular involvement is isolated and late.
1A60.3 - Late congenital neurosyphilis: Refers to neurological involvement with late manifestation, usually after two years of age, including conditions such as juvenile general paresis and tabes dorsalis. Although early symptomatic congenital syphilis may include cerebrospinal fluid alterations, code 1A60.3 is reserved for frank neurological manifestations of late onset.
Step 4: Required documentation
Adequate documentation should include a checklist of mandatory information: detailed maternal history of syphilis including timing of diagnosis, treatment performed, adequacy of therapy, and serological response; results of maternal and infant serological tests with specific dates and titers; complete description of physical examination identifying all clinical manifestations present; results of complementary examinations including complete blood count, liver function, radiographs of long bones, and cerebrospinal fluid analysis; description of skin lesions with location and characteristics; measurements of hepatomegaly and splenomegaly when present.
The record must specify the child's age at the time of diagnosis, confirming that it is within the two-year period that characterizes the early form. The justification for classification as symptomatic must be clear, listing the signs and symptoms that support this categorization. Documenting the therapeutic plan instituted and the follow-up scheme planned also contributes to continuity of care and outcome evaluation.
6. Complete Practical Example
Clinical Case:
A female infant, 45 days old, is brought to the pediatric emergency department with irritability, feeding difficulty, and appearance of skin lesions for five days. The mother, 22 years old, had irregular prenatal care with only three visits, without documented serological screening in the first trimester. In the third trimester, syphilis was diagnosed through reactive VDRL 1:64, but she received only one dose of benzathine penicillin two weeks before delivery, which occurred at 37 weeks of gestation.
On physical examination, the infant presents with weight of 3,200g (10th percentile for age), irritability on handling, moderate mucocutaneous pallor. The skin shows disseminated erythematous maculopapular rash, with bullous lesions on the palms and soles, some already in the desquamation phase. There are radial perioral fissures and nasal desquamation. The abdomen is distended with hepatomegaly of 3.5 cm and splenomegaly of 2.5 cm below the costal margins. Palpable lymph nodes in cervical, axillary, and inguinal chains, mobile, painless, measuring up to 1 cm. No signs of evident neurological involvement, but the child presents with weak cry and discrete hypotonia.
Laboratory investigation reveals: infant VDRL 1:256, FTA-Abs IgM positive; complete blood count with hemoglobin 8.5 g/dL, leukocytes 18,000/mm³ with left shift, platelets 95,000/mm³; total bilirubin 6.2 mg/dL (direct 3.8 mg/dL); ALT 145 U/L, AST 178 U/L. Radiographs of long bones demonstrate metaphyseal osteochondritis and periostitis in tibias and femurs bilaterally. Cerebrospinal fluid analysis shows proteinorrhachia of 120 mg/dL, normal glycorrhachia, 15 cells/mm³ with lymphocytic predominance, non-reactive cerebrospinal fluid VDRL.
Coding Step by Step:
Criteria analysis: The infant presents with multiple clinical manifestations characteristic of congenital syphilis, including typical skin lesions (palmoplantar bullae, perioral fissures), hepatosplenomegaly, lymphadenopathy, hematological alterations (anemia, thrombocytopenia), elevation of liver enzymes, and skeletal radiological alterations. The age of 45 days classifies the condition as early form. The maternal history of inadequately treated syphilis (only one dose of penicillin, less than four weeks before delivery) and the infant's serological titers significantly higher than maternal titers confirm active congenital infection.
Code chosen: 1A60.0 - Early congenital syphilis, symptomatic
Complete justification: Code 1A60.0 is appropriate because all diagnostic criteria are present: confirmed vertical transmission (maternal history and serology), age less than two years (45 days), presence of multiple symptomatic clinical manifestations. The symptomatic form is unequivocal due to characteristic skin lesions, hepatosplenomegaly, hematological and radiological alterations. It is not a latent form (1A60.1) due to the presence of evident symptoms. It is not late form since the age is within the first two years and there are no specific manifestations that would justify codes for late ocular disease (1A60.2) or neurosyphilis (1A60.3).
Complementary codes: Depending on the coding system used and the need to specify complications, complementary codes may be added for anemia (3A00.0), thrombocytopenia, hepatitis, or other specific manifestations, although the primary code 1A60.0 already encompasses the main diagnosis. Documentation should mention the treatment instituted (intravenous crystalline penicillin G for 10 days) and the plan for clinical and serological follow-up.
7. Related Codes and Differentiation
Within the Same Category:
1A60.1 - Early congenital syphilis, latent form
When to use vs. 1A60.0: This code applies exclusively to children under two years of age who present with serological evidence of congenital syphilis but remain completely asymptomatic. The fundamental differentiation is the absence of any clinical manifestation on physical examination, absence of bone radiological changes, and absence of laboratory abnormalities attributable to syphilis (except positive serology).
Main difference: The presence or absence of symptoms. While 1A60.0 requires evident clinical manifestations, 1A60.1 is characterized by complete absence of symptoms despite serological confirmation. A six-month-old infant with positive FTA-Abs and VDRL 1:32, but with normal physical examination, normal radiographs, and unremarkable complete blood count, should be coded as 1A60.1.
1A60.2 - Late congenital syphilitic ocular disease
When to use vs. 1A60.0: This code is specific for ophthalmological manifestations of congenital syphilis that emerge after two years of age. Interstitial keratitis is the most characteristic presentation, usually appearing between 5 and 20 years of age, manifesting with photophobia, tearing, decreased visual acuity, and corneal opacification.
Main difference: Differentiation is based on two criteria: temporal (after two years of age) and anatomical (specific ocular involvement). If a child with early congenital syphilis presents with ocular manifestations in the first two years associated with other systemic symptoms, code 1A60.0 remains appropriate. Code 1A60.2 is reserved for isolated ophthalmological manifestations of late onset.
1A60.3 - Late congenital neurosyphilis
When to use vs. 1A60.0: Applies to late neurological involvement of congenital syphilis, including juvenile general paresis (manifesting with cognitive deterioration, behavioral changes, and progressive neurological deficits) and juvenile tabes dorsalis (with ataxia, lancinating pains, areflexia, and sphincter disturbances). These manifestations usually emerge in the second decade of life.
Main difference: The temporal criterion is fundamental: neurological manifestations in the first two years, even if prominent, still fall under 1A60.0 if there are other systemic manifestations of the early form. Code 1A60.3 is specific for well-defined late neurological syndromes that appear years after the neonatal period, representing sequelae or progression of untreated or inadequately treated infection.
Differential Diagnoses:
Other congenital infections of the TORCH complex: Toxoplasmosis, rubella, cytomegalovirus, and herpes can present with clinical manifestations overlapping with congenital syphilis, including hepatosplenomegaly, jaundice, petechiae, microcephaly, and chorioretinitis. Differentiation requires specific serology for each agent. The presence of peripheral cerebral calcifications suggests toxoplasmosis, while periventricular calcifications are more typical of cytomegalovirus. The absence of characteristic bone changes and specific serology allow for distinction.
Neonatal sepsis: Can present with hepatosplenomegaly, hematological changes, and systemic involvement similar to congenital syphilis. Positive blood cultures, elevated C-reactive protein, and absence of characteristic skin lesions or bone changes of syphilis guide the diagnosis. Maternal history and serology are fundamental for differentiation.
Hemolytic disease of the newborn: Can cause anemia, jaundice, and hepatosplenomegaly, but the Coombs test is positive, there is documented maternal-fetal blood incompatibility, and absence of characteristic skin or bone lesions of syphilis. Negative treponemal serology excludes congenital syphilis.
8. Differences with ICD-10
In the ICD-10 classification, symptomatic early congenital syphilis was coded as A50.0. The transition to ICD-11 brought significant structural changes in the organization of infectious disease codes, including greater specificity and clarity in categorization.
The main structural change is the hierarchical reorganization, where ICD-11 uses the alphanumeric system 1A60.0, while ICD-10 used A50.0. ICD-11 offers greater granularity in differentiating between early and late forms, symptomatic and latent, facilitating precise coding and reducing interpretive ambiguities.
In ICD-10, category A50 encompassed all forms of congenital syphilis, with less detailed subdivisions. ICD-11, through category 1A60 and its specific subcategories (1A60.0, 1A60.1, 1A60.2, 1A60.3), provides greater precision in classifying the different clinical and temporal presentations of the disease.
The practical impact of these changes includes greater ease in epidemiological analysis, allowing clear distinction between early symptomatic cases and latent and late forms. This facilitates monitoring of trends, evaluation of prevention programs, and comparison of data between different regions and periods. For healthcare professionals, the clearer structure of ICD-11 reduces coding errors and improves communication between different levels of care.
Health information systems needed to adapt to the new coding structure, but the transition offers benefits in terms of diagnostic precision and analytical capacity. The correspondence between A50.0 (ICD-10) and 1A60.0 (ICD-11) should be established in systems that still maintain historical records in both classifications, ensuring continuity in time series analysis.
9. Frequently Asked Questions
How is early symptomatic congenital syphilis diagnosed?
The diagnosis is based on a combination of maternal history of syphilis during pregnancy, characteristic clinical manifestations in the infant, and laboratory confirmation. Maternal evaluation should include verification of adequate treatment (benzathine penicillin in appropriate doses, with correct intervals and at least 30 days before delivery). In the infant, physical examination seeks bullous or maculopapular skin lesions, hepatosplenomegaly, rhinitis, perioral fissures, lymphadenopathy, and pseudoparalysis. Serological tests include quantitative VDRL or RPR (infant titers should be compared to maternal titers) and confirmatory treponemal tests. Long bone radiographs identify osteochondritis and periostitis. Cerebrospinal fluid analysis is recommended in all cases to evaluate neurosyphilis. Complete blood count may reveal anemia, thrombocytopenia, and leukocytosis.
Is treatment available in public health systems?
Yes, treatment for congenital syphilis is widely available in public health systems in various countries, as penicillin, the drug of choice, is a low-cost antibiotic included in essential medicine lists of international health organizations. Standard treatment consists of intravenous crystalline penicillin G or intramuscular penicillin G procaine for 10 to 14 days. Availability may vary depending on the region and local infrastructure, but congenital syphilis control programs generally prioritize access to adequate treatment. Clinical and serological follow-up should also be ensured to assess therapeutic response and identify possible treatment failures.
How long does treatment last?
Standard treatment for symptomatic congenital syphilis lasts 10 to 14 days, using intravenous crystalline penicillin G every 12 hours (first week of life) or every 8 hours (after the first week), or intramuscular penicillin G procaine once daily. The specific duration may be adjusted according to the severity of the clinical presentation and presence of neurosyphilis. After treatment, clinical and serological follow-up should be maintained for at least 12 months, with evaluations at 1, 2, 3, 6, and 12 months, including quantitative serological tests to document decline in titers. In cases of neurosyphilis, cerebrospinal fluid analysis should be repeated every 6 months until complete normalization.
Can this code be used in medical certificates?
Yes, code 1A60.0 can be used in medical documentation, including certificates, reports, and medical records, when appropriate to the clinical context. However, considerations regarding confidentiality and stigma should be observed. In some situations, it may be more appropriate to use general descriptive terms such as "congenital infection" in documents that will be widely shared, reserving complete diagnostic specification for internal medical documentation and communication between healthcare professionals. The decision should consider the purpose of the document, local legal requirements, and the best interest of the child and family, always respecting ethical principles of confidentiality and non-discrimination.
Can early symptomatic congenital syphilis cause permanent sequelae?
Yes, despite adequate treatment, some manifestations of congenital syphilis may result in permanent sequelae. Bone alterations, when severe, can leave skeletal deformities. Neurological involvement, even when treated, may result in persistent cognitive or motor deficits. Hearing alterations, including sensorineural deafness, may occur and be irreversible. Therefore, early diagnosis and immediate treatment are fundamental to minimize sequelae. Prolonged follow-up is essential to identify and intervene early in late complications, including ophthalmological, audiological, and neuropsychomotor development evaluation.
How to differentiate congenital syphilis from other neonatal infections?
Differentiation is based on specific clinical characteristics and laboratory confirmation. Bullous skin lesions on palms and soles are highly suggestive of syphilis. Characteristic bone radiological alterations (metaphyseal osteochondritis, periostitis) are distinctive. Maternal history of syphilis is fundamental. Other infections in the TORCH complex present particularities: toxoplasmosis frequently causes chorioretinitis and cerebral calcifications; cytomegalovirus may cause microcephaly and periventricular calcifications; congenital rubella is associated with cardiac disease and cataract. Specific serology for each infectious agent is essential for definitive diagnostic confirmation.
What is the importance of prenatal care in preventing congenital syphilis?
Adequate prenatal care is fundamental for preventing congenital syphilis, as it allows maternal serological screening, early diagnosis of infection, and timely treatment before vertical transmission or significant fetal damage occurs. Screening should be performed at the first prenatal visit and repeated in the third trimester and at the time of delivery in at-risk populations. Maternal treatment with benzathine penicillin, when performed adequately and with sufficient time before delivery (at least 30 days), is highly effective in preventing vertical transmission. The sexual partner should also be tested and treated to prevent maternal reinfection. Congenital syphilis is considered a sentinel event for the quality of prenatal care.
Is hospitalization necessary for treatment of symptomatic congenital syphilis?
Yes, early symptomatic congenital syphilis generally requires hospitalization for intravenous penicillin administration, rigorous clinical monitoring, and evaluation of complications. Administration of intravenous crystalline penicillin G every 8-12 hours for 10-14 days requires reliable venous access and hospital supervision. Furthermore, symptomatic infants frequently present complications requiring hospital management, including severe anemia, thrombocytopenia, respiratory compromise, feeding difficulty, and need for nutritional support. The hospital environment allows multidisciplinary evaluation, performance of complementary tests, and therapeutic adjustments as needed. After hospital discharge, rigorous outpatient follow-up should be maintained.
Keywords: ICD-11 1A60.0, early symptomatic congenital syphilis, Treponema pallidum, vertical transmission, neonatal hepatosplenomegaly, syphilitic osteochondritis, bullous lesions on palms and soles, diagnosis of congenital syphilis, penicillin treatment, prenatal prevention
External References
This article was prepared based on reliable scientific sources:
- 🌍 WHO ICD-11 - Early symptomatic congenital syphilis
- 🔬 PubMed Research on Early symptomatic congenital syphilis
- 🌍 WHO Health Topics
- 📋 CDC - Centers for Disease Control
- 📊 Clinical Evidence: Early symptomatic congenital syphilis
- 📋 Ministry of Health - Brazil
- 📊 Cochrane Systematic Reviews
References verified on 2026-02-04