Confluent and reticulated papillomatosis of Gougerot and Carteaud (also known as "Confluent and reticulated papillomatosis," "CRP", "CARP", "Familial cutaneous papillomatosis," and "Familial occurrence of confluent and reticulated papillomatosis") is an uncommon but distinctive acquired ichthyosiform dermatosis characterized by persistent dark, scaly, papules and plaques that tend to be localized predominantly on the central trunk.

Henri Gougerot and Alexandre Carteaud originally described the condition in 1927. The cause remains unknown, but the observation that the condition may clear with Minocycline turned attention to an infectious agent. "Actinomycete Dietzia" strain X was isolated from one individual. Other antibiotics found useful include azithromycin, fusidic acid, clarithromycin, erythromycin, tetracycline and cefdinir.

Reoviruses vaccines are advocated (in dams or in broilers) do not entirely solve the problem.

General hygiene and correct breeding conditions (especially correct brooding temperatures) may be efficient, but the disease often disappears as it had appeared, which makes it difficult to appreciate the effectiveness of control measures.

Causing agents may include

- viruses : reovirus (often considered as unique cause), adenoviruses, enteroviruses, rotaviruses, parvoviruses.

- bacteria like Escherichia coli, Proteus mirabilis, Enterococcus faecium, Staphylococcus cohnii, Clostridium perfringens, Bacteroides fragilis and Bacillus licheniformis, often isolated in affected birds.

Basophilia as an isolated finding is uncommon. However it is a common feature of myeloproliferative disorders and particularly prominent in chronic myelogenous leukemia.

Conditions Associated with Increased Numbers of Blood Basophils

- Allergy or inflammation

1. Ulcerative colitis

2. Drug, food, inhalant hypersensitivity

3. Erythroderma, urticaria

4. Juvenile rheumatoid arthritis

- Endocrinopathy

1. Diabetes mellitus

2. Estrogen administration

3. Hypothyroidism (myxedema)

- Infection

1. Chicken pox

2. Influenza

3. Smallpox

4. Tuberculosis

- Iron deficiency

- Exposure to ionizing radiation

- Neoplasia

1. "Basophilic leukemia" (see text)

- Myeloproliferative neoplasms (especially chronic myelogenous leukemia; also polycythemia vera, primary myelofibrosis, essential thrombocythemia)

- Carcinoma

Basophilia is a condition where the basophil quantity is abnormally elevated (more than 10 basophils per liter of blood). Basophilia is associated with pruritus (itching) due to the release of histamine.

Adermatoglyphia is an extremely rare genetic disorder which causes a person to have no fingerprints. There are only four known extended families worldwide which are affected by this condition.

In 2011, the description of a case of a person from Switzerland lacking fingerprints as an isolated finding was published. The phenotype was mapped to chromosome 4q22. In the splice-site of a 3' exon of the gene for SMARCAD1-helicase, a point mutation was detected. It results in a shortened form of the skin-specific protein. The heterozygous mode of mutation suggests an autosomal dominant mode of inheritance.

Other conditions can cause a lack of fingerprints, but unlike them, adermatoglyphia has no other side effects. Mutations in helicases are involved in other rare genetic diseases, for instance Werner syndrome.

Prevalence is estimated to be 0.005%. The age of onset has been found to be under 15 years in 40% of cases while it is between 10 and 14 years in one third of the cases. Females outnumber males, 4 to 1. Only 3% have attacks after age 52.

Isolated congenital asplenia (ICAS) is a rare disease in humans that can cause life-threatening bacterial infections in children due to primary immunodeficiency. The infections can include pneumococal sepsis and meningitis.

ICAS is a ribosomopathy, due to autosomal dominant mutation of the "RPSA" gene on chromosome 3p21. Unlike heterotaxy syndrome, the absent spleen is not associated with other structural developmental defects.

Benign hereditary chorea (BHC), also known as benign familial chorea, is a rare autosomal dominant neurogenetic syndrome. It typically presents in childhood with isolated chorea. Unlike other neurogenetic causes of chorea such as Huntington's disease, BHC is not progressive, and not associated with cognitive decline or psychiatric problems in the vast majority of cases.

BHC is caused by a single-nucleotide insertion mutation in "TITF1", which encodes thyroid transcription factor 1 (TTF-1). This gene is also known as NK2 homeobox 1 (NKX2-1)

In some cases, additional developmental abnormalities of lung and thyroid tissue are found in BHC, leading to the suggested alternative name "brain-lung-thyroid syndrome".

Minor degrees of curvature are common. Reports of incidence vary between 1% and 19.5%.

Warty dyskeratoma, also known as an Isolated dyskeratosis follicularis, is a benign epidermal proliferation with distinctive histologic findings that may mimic invasive squamous cell carcinoma and commonly manifests as an umbilicated (Having a central mark or depression resembling a navel) lesion with a keratotic plug, WD have some histopathologic similarities to viral warts but it's not caused by HPV and the majority of these lesions display overall histopathologic features consistent with a follicular adnexal neoplasm. usually limited to the head, neck, scalp or face and vulva. Lesions are generally and sporadic and may be associated with a follicular unit. Oral involvement, particularly the hard palate, and genital involvement have been reported. it can also be thought of as one of the manifestations of focal acantholytic dyskeratosis, an epidermal reaction pattern that can be seen in several disorders, including Darier's disease and Grover's disease. But the main Difference between Darier disease and Warty dyskeratoma, is that Darier disease inherited dermatosis (autosomal dominant) consisting of multiple keratotic papules on the face, trunk, and extremities, while WD occurs as an isolated, noninherited, single keratotic nodule mainly confined to the head and neck as mentioned earlier.

Premature thelarche is a rare medical condition that is characterized by isolated breast development (thelarche being the onset of breast development) at a very early age with no other signs of sexual maturation. It generally occurs within the first 1 to 4 years of life, with a peak incidence of 2 years of age, and tends to resolve within 1 to 2 years without treatment. The condition never advances beyond Tanner stage III breast development.

Premature thelarche is distinct from neonatal breast hyperplasia (see also witch's milk), which is common in the first few months of life and is due to acute exposure to high levels of sex hormones like estrogen during pregnancy. Premature thelarche is also distinct from precocious puberty, which generally occurs later in childhood and also includes development of other pubertal characteristics.

Treatment with fennel ("Foeniculum vulgare") has been associated with premature thelarche in several case reports. Estradiol levels were found to be elevated by 15–20 times for the ages of the afflicted girls (5 months to 5 years). Also, fennel is known to contain anethole, an estrogenic compound.

In Ollier disease isolated enchondromas are present without the presence of hemangiomas.

Warty dyskeratoma must be differentiated from vulvar dysplasia, Bowenoid papulosis, squamous carcinoma, condyloma, and other viral-induced squamous lesions.

von Zumbusch (acute) generalized pustular psoriasis, (acute GPP) is the most severe form of generalized pustular psoriasis, and can be associated with life-threatening complications.

Acropachy or thyroid acropachy refers to a dermopathy associated with Graves' disease. It is characterized by soft-tissue swelling of the hands and clubbing of the fingers. Radiographic imaging of affected extremities typically demonstrates periostitis, most commonly the metacarpal bones. The exact cause is unknown, but it is thought to be caused by stimulating auto-antibodies that are implicated in the pathophysiology of Graves' thyrotoxicosis. There is no effective treatment for acropachy.

Since it is closely associated with Graves' disease, it is associated with other manifestations of Graves' disease, such as Graves' ophthalmopathy and thyroid dermopathy.

Hereditary acropachy (also known as "isolated congenital nail clubbing") may be associated with HPGD.

Clinodactyly is an autosomal dominant trait that has variable expressiveness and incomplete penetrance.

Clinodactyly can be passed through inheritance and presents as either an isolated anomaly or a component manifestation of a genetic syndrome. Many syndromes are associated with clinodactyly, including Down Syndrome, Turner syndrome, Aarskog syndrome, Carpenter syndrome, Seckel syndrome, Cornelia de Lange syndrome, orofaciodigital syndrome 1, 13q deletion syndrome, XXYY syndrome and Silver–Russell syndrome.

When identified prenatally, for example during obstetric ultrasonography, it may be an indication for intrauterine sampling for fetal chromosome analysis as it is statistically correlated with increased risk of chromosome aberration in the fetus.

Acute GPP typically requires inpatient management including both topical and systemic therapy, and supportive measures. Systemic glucocorticoid withdrawal is a common causative agent. Withdrawal or administration of certain drugs in the patient's previous medication regimen may be required. Oral retinoids are the most effective treatment, and are considered first line. Cyclosporine or infliximab may be required for particularly acute cases.

Patients are normal at birth and the syndrome manifests during childhood and puberty. The enchondromas affect the extremities and their distribution is asymmetrical. The most common sites of enchondromas are the metacarpal bones and phalanges of the hands. The feet are less commonly afflicted.

Disfigurations of the extremities are a result. Pathological fractures can arise in affected metaphyses and diaphyses of the long bones and are common (26%).

The risk for sarcomatous degeneration of enchondromas, hemangiomas, or lymphangiomas is 15-30% in the setting of Maffucci syndrome. Maffucci syndrome is associated with a higher risk of CNS, pancreatic, and ovarian malignancies. Multiple enchondromas may present in 3 disorders: Ollier disease, Maffucci syndrome, and metachondromatosis. It is important to make the distinction between these diseases, particularly Ollier disease and Maffucci syndrome. Ollier disease is more common than Maffucci syndrome, and presents with multiple enchondromas often in a unilateral distribution. However, hemangiomas and lymphangiomas are not seen in Ollier disease. Metachondromatosis demonstrates autosomal-dominant transmission and presents with both multiple osteochondromas and enchondromas.

Pogosta disease is a viral disease, established to be identical with other diseases, Karelian fever and Ockelbo disease. The names are derived from the words Pogosta, Karelia and Ockelbo, respectively.

The symptoms of the disease include usually rash, as well as mild fever and other flu-like symptoms; in most cases the symptoms last less than 5 days. However, in some cases, the patients develop a painful arthritis. There are no known chemical agents available to treat the disease.

It has long been suspected that the disease is caused by a Sindbis-like virus, a positive-stranded RNA virus belonging to the Alphavirus genus and family Togaviridae. In 2002 a strain of Sindbis was isolated from patients during an outbreak of the Pogosta disease in Finland, confirming the hypothesis.

This disease is mainly found in the Eastern parts of Finland; a typical Pogosta disease patient is a middle-aged person who has been infected through a mosquito bite while picking berries in the autumn. The prevalence of the disease is about 100 diagnosed cases every year, with larger outbreaks occurring in 7-year intervals.

Familial Isolated Vitamin E Deficiency also known as Ataxia With Vitamin E Deficiency is a rare autosomal recessive neurodegenerative disease. Symptoms are similar to those of Friedreich ataxia.

Vitamin E deficiency is rare and is almost never caused by a poor diet. Instead, there are three specific situations when a vitamin E deficiency is likely to occur:

- Premature, very low birth weight infants - birth weights less than 1500 grams, or 3.5 pounds. A neonatologist, a pediatrician specializing in the care of newborns, typically evaluates the nutritional needs of premature infants.

- Rare disorders of fat metabolism - There is a rare genetic condition termed isolated vitamin E deficiency or 'ataxia with isolated with vitamin E deficiency', caused by mutations in the gene for the tocopherol transfer protein. These individuals have an extremely poor capacity to absorb vitamin E and develop neurological complications that are reversed by high doses of vitamin E.

- Fat malabsorption - Some dietary fat is needed for the absorption of vitamin E from the gastrointestinal tract. Anyone diagnosed with cystic fibrosis, individuals who have had part or all of their stomach removed or who have had a gastric bypass, and individuals with malabsorptive problems such as Crohn's disease, liver disease or exocrine pancreatic insufficiency may not absorb fat (people who cannot absorb fat often pass greasy stools or have chronic diarrhea and bloating). Abetalipoproteinemia is a rare inherited disorder of fat metabolism that results in poor absorption of dietary fat and vitamin E. The vitamin E deficiency associated with this disease causes problems such as poor transmission of nerve impulses, muscle weakness, and degeneration of the retina that can cause blindness.

Adrenocorticotropic hormone deficiency (ACTH deficiency) is a result of a decreased or absent production of adrenocorticotropic hormone (ACTH) by the pituitary gland.

It can be associated with "TBX19".

In the above brachydactyly syndromes, short digits are the most prominent of the anomalies, but in many other syndromes (Down syndrome, Rubinstein-Taybi syndrome, etc.), brachydactyly is a minor feature compared to the other anomalies or problems comprising the syndrome.