Related Experiment Video
Updated: Jun 11, 2026

08:42
Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model
Published on: July 3, 2020
Case report: Short rib polydactyly syndrome - type 2 (Majewski syndrome)
Pramod Setty Jutur1, Chandan Pramod Kumar, Shetteppa Goroshi
1Department of Radio Diagnosis, J. J. M. Medical College, Davangere - 577 004, Karnataka, India.
The Indian Journal of Radiology & Imaging
|July 8, 2010
Summary
Short rib polydactyly syndrome type 2 (Majewski syndrome) is a lethal skeletal dysplasia. This case highlights its antenatal diagnosis via ultrasound, confirmed postnatally, aiding in understanding this rare genetic disorder.
Area of Science:
- Medical Genetics
- Skeletal Dysplasias
- Prenatal Diagnosis
Background:
- Short rib polydactyly syndrome type 2 (SRPS type 2), also known as Majewski syndrome, is a rare, lethal autosomal recessive skeletal dysplasia.
- It is characterized by distinctive features including horizontally oriented short ribs, polysyndactyly (extra digits), and micromelia (disproportionately short limbs).
Observation:
- This report details a specific case of SRPS type 2.
- Diagnosis was initially made using antenatal ultrasound (USG) at 28 weeks of gestation.
- Confirmation was achieved through subsequent postnatal radiography, fetal autopsy, and histopathological examination.
Findings:
- The case presentation aligns with the known phenotypic characteristics of SRPS type 2.
- Antenatal ultrasound proved effective for early identification of this severe skeletal dysplasia.
- Postnatal investigations corroborated the ultrasound findings, providing a comprehensive diagnostic picture.
Implications:
- Early and accurate diagnosis of SRPS type 2 is crucial for genetic counseling and family planning.
- This case underscores the utility of advanced imaging techniques in diagnosing lethal fetal conditions.
- Further research into the genetic basis and potential management strategies for SRPS type 2 may be warranted.
Related Concept Videos
Pleiotropy
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
Bones of the Upper Limb: Radius
The radius is longer of the two bones that make up the human antebrachium or forearm. At the proximal end, the radius articulates with the capitulum of the humerus and the radial notch of the ulna to form the elbow joint. At the distal end, the radius articulates with the ulna via the ulnar notch, forming the distal radioulnar joint. Distally, the radius also attaches to the carpal wrist bones (scaphoid and lunate) to form the radiocarpal joint.
The radius has a nail-shaped head, and a short...
The radius has a nail-shaped head, and a short...
Lethal Alleles
Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Nondisjunction
Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers. Nondisjunction is common during anaphase I or anaphase II of meiosis. Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold sister...
Nondisjunction
During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.
Nondisjunction
During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.
